diff --git a/Cargo.lock b/Cargo.lock
index 8d72818904e3..1b6f03b18329 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -164,7 +164,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0d0864d84b8e07b145449be9a8537db86bf9de5ce03b913214694643b4743502"
 dependencies = [
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -187,20 +187,30 @@ version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7deb0a829ca7bcfaf5da70b073a8d128619259a7be8216a355e23f00763059e5"
 
+[[package]]
+name = "async-macros"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e421d59b24c1feea2496e409b3e0a8de23e5fc130a2ddc0b012e551f3b272bba"
+dependencies = [
+ "futures-core-preview",
+ "pin-utils",
+]
+
 [[package]]
 name = "async-std"
-version = "1.5.0"
+version = "0.99.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "538ecb01eb64eecd772087e5b6f7540cbc917f047727339a472dafed2185b267"
+checksum = "44501a9f7961bb539b67be0c428b3694e26557046a52759ca7eaf790030a64cc"
 dependencies = [
- "async-task",
- "broadcaster",
- "crossbeam-channel",
+ "async-macros",
+ "async-task 1.3.1",
+ "crossbeam-channel 0.3.9",
  "crossbeam-deque",
- "crossbeam-utils",
+ "crossbeam-utils 0.6.6",
  "futures-core",
  "futures-io",
- "futures-timer 2.0.2",
+ "futures-timer 1.0.3",
  "kv-log-macro",
  "log 0.4.8",
  "memchr",
@@ -213,6 +223,30 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "async-std"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a45cee2749d880d7066e328a7e161c7470ced883b2fd000ca4643e9f1dd5083a"
+dependencies = [
+ "async-task 3.0.0",
+ "crossbeam-utils 0.7.2",
+ "futures-channel",
+ "futures-core",
+ "futures-io",
+ "futures-timer 3.0.2",
+ "kv-log-macro",
+ "log 0.4.8",
+ "memchr",
+ "num_cpus",
+ "once_cell",
+ "pin-project-lite",
+ "pin-utils",
+ "slab",
+ "smol",
+ "wasm-bindgen-futures",
+]
+
 [[package]]
 name = "async-task"
 version = "1.3.1"
@@ -223,6 +257,12 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
+[[package]]
+name = "async-task"
+version = "3.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c17772156ef2829aadc587461c7753af20b7e8db1529bc66855add962a3b35d3"
+
 [[package]]
 name = "async-tls"
 version = "0.7.0"
@@ -301,9 +341,9 @@ dependencies = [
 
 [[package]]
 name = "bindgen"
-version = "0.53.2"
+version = "0.53.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6bb26d6a69a335b8cb0e7c7e9775cd5666611dc50a37177c3f2cedcfc040e8c8"
+checksum = "c72a978d268b1d70b0e963217e60fdabd9523a941457a6c42a7315d15c7e89e5"
 dependencies = [
  "bitflags",
  "cexpr",
@@ -315,7 +355,7 @@ dependencies = [
  "lazycell",
  "log 0.4.8",
  "peeking_take_while",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
  "regex",
  "rustc-hash",
@@ -419,20 +459,6 @@ dependencies = [
  "byte-tools",
 ]
 
-[[package]]
-name = "broadcaster"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d9c972e21e0d055a36cf73e4daae870941fe7a8abcd5ac3396aab9e4c126bd87"
-dependencies = [
- "futures-channel",
- "futures-core",
- "futures-sink",
- "futures-util",
- "parking_lot 0.10.2",
- "slab",
-]
-
 [[package]]
 name = "bs58"
 version = "0.3.1"
@@ -748,13 +774,36 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "crossbeam"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69323bff1fb41c635347b8ead484a5ca6c3f11914d784170b158d8449ab07f8e"
+dependencies = [
+ "cfg-if",
+ "crossbeam-channel 0.4.2",
+ "crossbeam-deque",
+ "crossbeam-epoch",
+ "crossbeam-queue",
+ "crossbeam-utils 0.7.2",
+]
+
+[[package]]
+name = "crossbeam-channel"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8ec7fcd21571dc78f96cc96243cab8d8f035247c3efd16c687be154c3fa9efa"
+dependencies = [
+ "crossbeam-utils 0.6.6",
+]
+
 [[package]]
 name = "crossbeam-channel"
 version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cced8691919c02aac3cb0a1bc2e9b73d89e832bf9a06fc579d4e71b68a2da061"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "maybe-uninit",
 ]
 
@@ -765,7 +814,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f02af974daeee82218205558e51ec8768b48cf524bd01d550abe5573a608285"
 dependencies = [
  "crossbeam-epoch",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "maybe-uninit",
 ]
 
@@ -777,7 +826,7 @@ checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 dependencies = [
  "autocfg 1.0.0",
  "cfg-if",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "lazy_static",
  "maybe-uninit",
  "memoffset",
@@ -791,7 +840,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
 dependencies = [
  "cfg-if",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
+]
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.6.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04973fa96e96579258a5091af6003abde64af786b860f18622b82e026cca60e6"
+dependencies = [
+ "cfg-if",
+ "lazy_static",
 ]
 
 [[package]]
@@ -855,9 +914,9 @@ dependencies = [
 
 [[package]]
 name = "data-encoding"
-version = "2.2.0"
+version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11c0346158a19b3627234e15596f5e465c360fcdb97d817bcb255e0510f5a788"
+checksum = "72aa14c04dfae8dd7d8a2b1cb7ca2152618cd01336dbfe704b8dcbf8d41dbd69"
 
 [[package]]
 name = "derive_more"
@@ -891,9 +950,9 @@ version = "0.99.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2127768764f1556535c01b5326ef94bd60ff08dcfbdc544d53e69ed155610f5d"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -1011,9 +1070,9 @@ version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "946ee94e3dbf58fdd324f9ce245c7b238d46a66f00e86a020b71996349e46cce"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -1117,9 +1176,9 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aa4da3c766cd7a0db8242e326e9e4e081edd567072893ed320008189715366a4"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "synstructure",
 ]
 
@@ -1208,16 +1267,16 @@ checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
 [[package]]
 name = "fork-tree"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
 ]
 
 [[package]]
 name = "frame-benchmarking"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -1233,8 +1292,8 @@ dependencies = [
 
 [[package]]
 name = "frame-benchmarking-cli"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "parity-scale-codec",
@@ -1251,8 +1310,8 @@ dependencies = [
 
 [[package]]
 name = "frame-executive"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -1266,8 +1325,8 @@ dependencies = [
 
 [[package]]
 name = "frame-metadata"
-version = "11.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "11.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "serde",
@@ -1277,8 +1336,8 @@ dependencies = [
 
 [[package]]
 name = "frame-support"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "bitmask",
  "frame-metadata",
@@ -1302,41 +1361,41 @@ dependencies = [
 
 [[package]]
 name = "frame-support-procedural"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support-procedural-tools",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "frame-support-procedural-tools"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support-procedural-tools-derive",
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "frame-support-procedural-tools-derive"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "frame-system"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "impl-trait-for-tuples",
@@ -1351,8 +1410,8 @@ dependencies = [
 
 [[package]]
 name = "frame-system-benchmarking"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -1365,8 +1424,8 @@ dependencies = [
 
 [[package]]
 name = "frame-system-rpc-runtime-api"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-api",
@@ -1449,6 +1508,12 @@ version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "59f5fff90fd5d971f936ad674802482ba441b6f09ba5e15fd8b39145582ca399"
 
+[[package]]
+name = "futures-core-preview"
+version = "0.3.0-alpha.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b35b6263fb1ef523c3056565fa67b1d16f0a8604ff12b11b08c25f28a734c60a"
+
 [[package]]
 name = "futures-cpupool"
 version = "0.1.8"
@@ -1500,9 +1565,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0b5a30a4328ab5473878237c447333c093297bded83a4983d10f4deea240d39"
 dependencies = [
  "proc-macro-hack",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -1520,6 +1585,16 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "futures-timer"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7946248e9429ff093345d3e8fdf4eb0f9b2d79091611c9c14f744971a6f8be45"
+dependencies = [
+ "futures-core-preview",
+ "pin-utils",
+]
+
 [[package]]
 name = "futures-timer"
 version = "2.0.2"
@@ -1993,9 +2068,9 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7ef5550a42e3740a0e71f909d4c861056a284060af885ae7aa6242820f920d9d"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -2053,6 +2128,15 @@ dependencies = [
  "either",
 ]
 
+[[package]]
+name = "itertools"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itoa"
 version = "0.4.5"
@@ -2143,9 +2227,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8609af8f63b626e8e211f52441fcdb6ec54f1a446606b10d5c89ae9bf8a20058"
 dependencies = [
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -2297,9 +2381,9 @@ dependencies = [
 
 [[package]]
 name = "kv-log-macro"
-version = "1.0.5"
+version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a2d3beed37e5483887d81eb39de6de03a8346531410e1306ca48a9a89bd3a51"
+checksum = "4ff57d6d215f7ca7eb35a9a64d656ba4d9d2bef114d741dc08048e75e2f5d418"
 dependencies = [
  "log 0.4.8",
 ]
@@ -2380,9 +2464,9 @@ checksum = "3576a87f2ba00f6f106fdfcd16db1d698d648a26ad8e0573cad8537c3c362d2a"
 
 [[package]]
 name = "libc"
-version = "0.2.70"
+version = "0.2.71"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3baa92041a6fec78c687fa0cc2b3fae8884f743d672cf551bed1d6dac6988d0f"
+checksum = "9457b06509d27052635f90d6466700c65095fdf75409b3fbdd903e988b886f49"
 
 [[package]]
 name = "libflate"
@@ -2452,9 +2536,9 @@ dependencies = [
 
 [[package]]
 name = "libp2p-core"
-version = "0.19.0"
+version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "80a6000296bdbff540b6c00ef82108ef23aa68d195b9333823ea491562c338d7"
+checksum = "4f5e30dcd8cb13a02ad534e214da234eca1595a76b5788b645dfa5c734d2124b"
 dependencies = [
  "asn1_der",
  "bs58",
@@ -2491,7 +2575,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f09548626b737ed64080fde595e06ce1117795b8b9fc4d2629fa36561c583171"
 dependencies = [
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -2554,7 +2638,7 @@ version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "51b00163d13f705aae67c427bea0575f8aaf63da6524f9bd4a5a093b8bda0b38"
 dependencies = [
- "async-std",
+ "async-std 0.99.12",
  "data-encoding",
  "dns-parser",
  "either",
@@ -2673,7 +2757,7 @@ version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "309f95fce9bec755eff5406f8b822fd3969990830c2b54f752e1fc181d5ace3e"
 dependencies = [
- "async-std",
+ "async-std 0.99.12",
  "futures 0.3.5",
  "futures-timer 3.0.2",
  "get_if_addrs",
@@ -2826,9 +2910,9 @@ dependencies = [
 
 [[package]]
 name = "lru"
-version = "0.4.4"
+version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "348b828e43d7d1d7a247a6ece0c041d95fb0e34d5496bb4c308428face25df6b"
+checksum = "9e488db3a9e108382265a30764f43cfc87517322e5d04ae0603b32a33461dca3"
 dependencies = [
  "hashbrown",
 ]
@@ -3019,9 +3103,9 @@ checksum = "d8883adfde9756c1d30b0f519c9b8c502a94b41ac62f696453c37c7fc0a958ce"
 
 [[package]]
 name = "multistream-select"
-version = "0.8.0"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74cdcf7cfb3402881e15a1f95116cb033d69b33c83d481e1234777f5ef0c3d2c"
+checksum = "991c33683908c588b8f2cf66c221d8f390818c1bdcd13fce55208408e027a796"
 dependencies = [
  "bytes 0.5.4",
  "futures 0.3.5",
@@ -3259,8 +3343,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-authority-discovery"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3275,8 +3359,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-authorship"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3290,8 +3374,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-babe"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3312,8 +3396,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-balances"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3326,8 +3410,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-collective"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3342,8 +3426,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-democracy"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3357,8 +3441,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-elections-phragmen"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3372,8 +3456,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-finality-tracker"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3388,8 +3472,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-grandpa"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3408,8 +3492,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-identity"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "enumflags2",
  "frame-benchmarking",
@@ -3424,8 +3508,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-im-online"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3444,8 +3528,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-indices"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3460,8 +3544,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-membership"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3474,8 +3558,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-nicks"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3488,8 +3572,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-offences"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3503,8 +3587,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-offences-benchmarking"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3524,8 +3608,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-randomness-collective-flip"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3537,8 +3621,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-recovery"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "enumflags2",
  "frame-support",
@@ -3552,8 +3636,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-scheduler"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3567,8 +3651,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-session"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3585,8 +3669,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-session-benchmarking"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3599,8 +3683,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-society"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3613,8 +3697,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-staking"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3635,19 +3719,19 @@ dependencies = [
 
 [[package]]
 name = "pallet-staking-reward-curve"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "pallet-sudo"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3660,8 +3744,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-timestamp"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3678,8 +3762,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-transaction-payment"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -3692,8 +3776,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-transaction-payment-rpc"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "jsonrpc-core",
  "jsonrpc-core-client",
@@ -3710,8 +3794,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-transaction-payment-rpc-runtime-api"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-support",
  "parity-scale-codec",
@@ -3723,8 +3807,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-treasury"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3738,8 +3822,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-utility"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-benchmarking",
  "frame-support",
@@ -3754,8 +3838,8 @@ dependencies = [
 
 [[package]]
 name = "pallet-vesting"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "enumflags2",
  "frame-benchmarking",
@@ -3852,9 +3936,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a0ec292e92e8ec7c58e576adacc1e3f399c597c8f263c42f18420abe58e7245"
 dependencies = [
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -3885,8 +3969,8 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f557c32c6d268a07c921471619c0295f5efad3a0e76d4f97a05c091a51d110b2"
 dependencies = [
- "proc-macro2 1.0.13",
- "syn 1.0.23",
+ "proc-macro2 1.0.17",
+ "syn 1.0.27",
  "synstructure",
 ]
 
@@ -3948,9 +4032,9 @@ dependencies = [
 
 [[package]]
 name = "paste"
-version = "0.1.12"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a229b1c58c692edcaa5b9b0948084f130f55d2dcc15b02fcc5340b2b4521476"
+checksum = "3431e8f72b90f8a7af91dec890d9814000cb371258e0ec7370d93e085361f531"
 dependencies = [
  "paste-impl",
  "proc-macro-hack",
@@ -3958,14 +4042,14 @@ dependencies = [
 
 [[package]]
 name = "paste-impl"
-version = "0.1.12"
+version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2e0bf239e447e67ff6d16a8bb5e4d4bd2343acf5066061c0e8e06ac5ba8ca68c"
+checksum = "25af5fc872ba284d8d84608bf8a0fa9b5376c96c23f503b007dfd9e34dde5606"
 dependencies = [
  "proc-macro-hack",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -4004,9 +4088,9 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
 [[package]]
 name = "petgraph"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "29c127eea4a29ec6c85d153c59dc1213f33ec74cead30fe4730aecc88cc1fd92"
+checksum = "467d164a6de56270bd7c4d070df81d07beace25012d5103ced4e9ff08d6afdb7"
 dependencies = [
  "fixedbitset",
  "indexmap",
@@ -4027,9 +4111,9 @@ version = "0.4.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e58db2081ba5b4c93bd6be09c40fd36cb9193a8336c384f3b40012e531aa7e40"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -4044,6 +4128,18 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "piper"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b0deb65f46e873ba8aa7c6a8dbe3f23cb1bf59c339a81a1d56361dde4d66ac8"
+dependencies = [
+ "crossbeam-utils 0.7.2",
+ "futures-io",
+ "futures-sink",
+ "futures-util",
+]
+
 [[package]]
 name = "pkg-config"
 version = "0.3.17"
@@ -4390,6 +4486,7 @@ dependencies = [
  "sp-staking",
  "sp-std",
  "sp-trie",
+ "static_assertions",
  "trie-db",
 ]
 
@@ -4646,9 +4743,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98e9e4b82e0ef281812565ea4751049f1bdcdfccda7d3f459f2e138a40c08678"
 dependencies = [
  "proc-macro-error-attr",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "version_check",
 ]
 
@@ -4658,18 +4755,18 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4f5444ead4e9935abd7f27dc51f7e852a0569ac888096d5ec2499470794e2e53"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "syn-mid",
  "version_check",
 ]
 
 [[package]]
 name = "proc-macro-hack"
-version = "0.5.15"
+version = "0.5.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d659fe7c6d27f25e9d80a1a094c223f5246f6a6596453e09d7229bf42750b63"
+checksum = "7e0456befd48169b9f13ef0f0ad46d492cf9d2dbb918bcf38e01eed4ce3ec5e4"
 
 [[package]]
 name = "proc-macro-nested"
@@ -4688,9 +4785,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.13"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53f5ffe53a6b28e37c9c1ce74893477864d64f74778a93a4beb43c8fa167f639"
+checksum = "1502d12e458c49a4c9cbff560d0fe0060c252bc29799ed94ca2ed4bb665a0101"
 dependencies = [
  "unicode-xid 0.2.0",
 ]
@@ -4742,7 +4839,7 @@ checksum = "02b10678c913ecbd69350e8535c3aef91a8676c0773fc1d7b95cdd196d7f2f26"
 dependencies = [
  "bytes 0.5.4",
  "heck",
- "itertools",
+ "itertools 0.8.2",
  "log 0.4.8",
  "multimap",
  "petgraph",
@@ -4759,10 +4856,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "537aa19b95acde10a12fec4301466386f757403de4cd4e5b4fa78fb5ecb18f72"
 dependencies = [
  "anyhow",
- "itertools",
- "proc-macro2 1.0.13",
+ "itertools 0.8.2",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -4819,7 +4916,7 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54a21852a652ad6f610c9510194f398ff6f8692e334fd1145fed931f7fbe44ea"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
 ]
 
 [[package]]
@@ -5058,7 +5155,7 @@ checksum = "08a89b46efaf957e52b18062fb2f4660f8b8a4dde1807ca002690868ef2c85a9"
 dependencies = [
  "crossbeam-deque",
  "crossbeam-queue",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "lazy_static",
  "num_cpus",
 ]
@@ -5113,9 +5210,9 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "602eb59cda66fcb9aec25841fb76bc01d2b34282dcdd705028da297db6f3eec8"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -5218,7 +5315,7 @@ dependencies = [
  "base64 0.11.0",
  "blake2b_simd",
  "constant_time_eq",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
 ]
 
 [[package]]
@@ -5307,8 +5404,8 @@ dependencies = [
 
 [[package]]
 name = "sc-authority-discovery"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "bytes 0.5.4",
  "derive_more 0.99.7",
@@ -5334,8 +5431,8 @@ dependencies = [
 
 [[package]]
 name = "sc-block-builder"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sc-client-api",
@@ -5350,8 +5447,8 @@ dependencies = [
 
 [[package]]
 name = "sc-chain-spec"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "impl-trait-for-tuples",
  "sc-chain-spec-derive",
@@ -5366,19 +5463,19 @@ dependencies = [
 
 [[package]]
 name = "sc-chain-spec-derive"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "sc-cli"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "ansi_term 0.12.1",
  "atty",
@@ -5418,8 +5515,8 @@ dependencies = [
 
 [[package]]
 name = "sc-client-api"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "fnv",
@@ -5454,8 +5551,8 @@ dependencies = [
 
 [[package]]
 name = "sc-client-db"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "blake2-rfc",
  "hash-db",
@@ -5483,8 +5580,8 @@ dependencies = [
 
 [[package]]
 name = "sc-consensus"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "sc-client-api",
  "sp-blockchain",
@@ -5494,8 +5591,8 @@ dependencies = [
 
 [[package]]
 name = "sc-consensus-babe"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "fork-tree",
@@ -5536,8 +5633,8 @@ dependencies = [
 
 [[package]]
 name = "sc-consensus-babe-rpc"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "futures 0.3.5",
@@ -5559,8 +5656,8 @@ dependencies = [
 
 [[package]]
 name = "sc-consensus-epochs"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "fork-tree",
  "parity-scale-codec",
@@ -5572,8 +5669,8 @@ dependencies = [
 
 [[package]]
 name = "sc-consensus-slots"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "futures-timer 3.0.2",
@@ -5594,8 +5691,8 @@ dependencies = [
 
 [[package]]
 name = "sc-consensus-uncles"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "log 0.4.8",
  "sc-client-api",
@@ -5608,8 +5705,8 @@ dependencies = [
 
 [[package]]
 name = "sc-executor"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "lazy_static",
@@ -5636,8 +5733,8 @@ dependencies = [
 
 [[package]]
 name = "sc-executor-common"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "log 0.4.8",
@@ -5653,8 +5750,8 @@ dependencies = [
 
 [[package]]
 name = "sc-executor-wasmi"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "log 0.4.8",
  "parity-scale-codec",
@@ -5668,8 +5765,8 @@ dependencies = [
 
 [[package]]
 name = "sc-executor-wasmtime"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "cranelift-codegen",
  "cranelift-wasm",
@@ -5689,8 +5786,8 @@ dependencies = [
 
 [[package]]
 name = "sc-finality-grandpa"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "assert_matches",
  "derive_more 0.99.7",
@@ -5726,8 +5823,8 @@ dependencies = [
 
 [[package]]
 name = "sc-finality-grandpa-rpc"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "finality-grandpa",
@@ -5743,8 +5840,8 @@ dependencies = [
 
 [[package]]
 name = "sc-informant"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "ansi_term 0.12.1",
  "futures 0.3.5",
@@ -5760,8 +5857,8 @@ dependencies = [
 
 [[package]]
 name = "sc-keystore"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "hex",
@@ -5775,8 +5872,8 @@ dependencies = [
 
 [[package]]
 name = "sc-network"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "bitflags",
  "bs58",
@@ -5827,8 +5924,8 @@ dependencies = [
 
 [[package]]
 name = "sc-network-gossip"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "futures-timer 3.0.2",
@@ -5842,8 +5939,8 @@ dependencies = [
 
 [[package]]
 name = "sc-network-test"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "env_logger",
  "futures 0.3.5",
@@ -5869,8 +5966,8 @@ dependencies = [
 
 [[package]]
 name = "sc-offchain"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "bytes 0.5.4",
  "fnv",
@@ -5896,8 +5993,8 @@ dependencies = [
 
 [[package]]
 name = "sc-peerset"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "libp2p",
@@ -5909,8 +6006,8 @@ dependencies = [
 
 [[package]]
 name = "sc-proposer-metrics"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "log 0.4.8",
  "substrate-prometheus-endpoint",
@@ -5918,8 +6015,8 @@ dependencies = [
 
 [[package]]
 name = "sc-rpc"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "hash-db",
@@ -5950,8 +6047,8 @@ dependencies = [
 
 [[package]]
 name = "sc-rpc-api"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "futures 0.3.5",
@@ -5974,8 +6071,8 @@ dependencies = [
 
 [[package]]
 name = "sc-rpc-server"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "jsonrpc-core",
  "jsonrpc-http-server",
@@ -5989,8 +6086,8 @@ dependencies = [
 
 [[package]]
 name = "sc-service"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "exit-future",
@@ -6047,8 +6144,8 @@ dependencies = [
 
 [[package]]
 name = "sc-state-db"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "log 0.4.8",
  "parity-scale-codec",
@@ -6061,8 +6158,8 @@ dependencies = [
 
 [[package]]
 name = "sc-telemetry"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "bytes 0.5.4",
  "futures 0.3.5",
@@ -6083,8 +6180,8 @@ dependencies = [
 
 [[package]]
 name = "sc-tracing"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "erased-serde",
  "log 0.4.8",
@@ -6098,8 +6195,8 @@ dependencies = [
 
 [[package]]
 name = "sc-transaction-graph"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "futures 0.3.5",
@@ -6118,8 +6215,8 @@ dependencies = [
 
 [[package]]
 name = "sc-transaction-pool"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "futures 0.3.5",
@@ -6176,6 +6273,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ea6a9290e3c9cf0f18145ef7ffa62d68ee0bf5fcd651017e586dc7fd5da448c2"
 
+[[package]]
+name = "scoped-tls-hkt"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2e9d7eaddb227e8fbaaa71136ae0e1e913ca159b86c7da82f3e8f0044ad3a63"
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"
@@ -6197,9 +6300,9 @@ version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e367622f934864ffa1c704ba2b82280aab856e3d8213c84c5720257eb34b15b9"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -6283,9 +6386,9 @@ version = "1.0.110"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "818fbf6bfa9a42d3bfcaca148547aa00c7b915bec71d1757aa2d44ca68771984"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -6319,9 +6422,9 @@ checksum = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
 
 [[package]]
 name = "sha2"
-version = "0.8.1"
+version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27044adfd2e1f077f649f59deb9490d3941d674002f7d062870a60ebe9bd47a0"
+checksum = "a256f46ea78a0c0d9ff00077504903ac881a1dafdc20da66545699e7776b3e69"
 dependencies = [
  "block-buffer",
  "digest",
@@ -6433,9 +6536,9 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a945ec7f7ce853e89ffa36be1e27dce9a43e82ff9093bf3461c30d5da74ed11b"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -6453,6 +6556,25 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c7cb5678e1615754284ec264d9bb5b4c27d2018577fd90ac0ceb578591ed5ee4"
 
+[[package]]
+name = "smol"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "686c634ad1873fffef6aed20f180eede424fbf3bb31802394c90fd7335a661b7"
+dependencies = [
+ "async-task 3.0.0",
+ "crossbeam",
+ "futures-io",
+ "futures-util",
+ "nix 0.17.0",
+ "once_cell",
+ "piper",
+ "scoped-tls-hkt",
+ "slab",
+ "socket2",
+ "wepoll-binding",
+]
+
 [[package]]
 name = "snow"
 version = "0.6.2"
@@ -6505,8 +6627,8 @@ dependencies = [
 
 [[package]]
 name = "sp-allocator"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "log 0.4.8",
@@ -6517,8 +6639,8 @@ dependencies = [
 
 [[package]]
 name = "sp-api"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "hash-db",
  "parity-scale-codec",
@@ -6532,20 +6654,20 @@ dependencies = [
 
 [[package]]
 name = "sp-api-proc-macro"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "blake2-rfc",
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "sp-application-crypto"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "serde",
@@ -6556,8 +6678,8 @@ dependencies = [
 
 [[package]]
 name = "sp-arithmetic"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "integer-sqrt",
  "num-traits 0.2.11",
@@ -6569,8 +6691,8 @@ dependencies = [
 
 [[package]]
 name = "sp-authority-discovery"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-api",
@@ -6581,8 +6703,8 @@ dependencies = [
 
 [[package]]
 name = "sp-authorship"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-inherents",
@@ -6592,8 +6714,8 @@ dependencies = [
 
 [[package]]
 name = "sp-block-builder"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-api",
@@ -6604,8 +6726,8 @@ dependencies = [
 
 [[package]]
 name = "sp-blockchain"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "log 0.4.8",
@@ -6620,8 +6742,8 @@ dependencies = [
 
 [[package]]
 name = "sp-chain-spec"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "serde",
  "serde_json",
@@ -6629,8 +6751,8 @@ dependencies = [
 
 [[package]]
 name = "sp-consensus"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "futures 0.3.5",
@@ -6652,8 +6774,8 @@ dependencies = [
 
 [[package]]
 name = "sp-consensus-aura"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-api",
@@ -6666,8 +6788,8 @@ dependencies = [
 
 [[package]]
 name = "sp-consensus-babe"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "merlin",
  "parity-scale-codec",
@@ -6683,8 +6805,8 @@ dependencies = [
 
 [[package]]
 name = "sp-consensus-vrf"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "schnorrkel",
@@ -6695,8 +6817,8 @@ dependencies = [
 
 [[package]]
 name = "sp-core"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "base58",
  "blake2-rfc",
@@ -6737,8 +6859,8 @@ dependencies = [
 
 [[package]]
 name = "sp-database"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "kvdb",
  "parking_lot 0.10.2",
@@ -6746,18 +6868,18 @@ dependencies = [
 
 [[package]]
 name = "sp-debug-derive"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "sp-externalities"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "environmental",
  "parity-scale-codec",
@@ -6767,8 +6889,8 @@ dependencies = [
 
 [[package]]
 name = "sp-finality-grandpa"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "finality-grandpa",
  "log 0.4.8",
@@ -6783,8 +6905,8 @@ dependencies = [
 
 [[package]]
 name = "sp-finality-tracker"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-inherents",
@@ -6793,8 +6915,8 @@ dependencies = [
 
 [[package]]
 name = "sp-inherents"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "parity-scale-codec",
@@ -6805,8 +6927,8 @@ dependencies = [
 
 [[package]]
 name = "sp-io"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "hash-db",
@@ -6825,8 +6947,8 @@ dependencies = [
 
 [[package]]
 name = "sp-keyring"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "lazy_static",
  "sp-core",
@@ -6836,8 +6958,8 @@ dependencies = [
 
 [[package]]
 name = "sp-offchain"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "sp-api",
  "sp-core",
@@ -6846,8 +6968,8 @@ dependencies = [
 
 [[package]]
 name = "sp-panic-handler"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "backtrace",
  "log 0.4.8",
@@ -6855,8 +6977,8 @@ dependencies = [
 
 [[package]]
 name = "sp-phragmen"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "serde",
@@ -6867,19 +6989,19 @@ dependencies = [
 
 [[package]]
 name = "sp-phragmen-compact"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "sp-rpc"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "serde",
  "sp-core",
@@ -6887,8 +7009,8 @@ dependencies = [
 
 [[package]]
 name = "sp-runtime"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "hash256-std-hasher",
  "impl-trait-for-tuples",
@@ -6908,8 +7030,8 @@ dependencies = [
 
 [[package]]
 name = "sp-runtime-interface"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "primitive-types",
@@ -6923,20 +7045,20 @@ dependencies = [
 
 [[package]]
 name = "sp-runtime-interface-proc-macro"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "Inflector",
  "proc-macro-crate",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
 name = "sp-serializer"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "serde",
  "serde_json",
@@ -6944,8 +7066,8 @@ dependencies = [
 
 [[package]]
 name = "sp-session"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-api",
@@ -6957,8 +7079,8 @@ dependencies = [
 
 [[package]]
 name = "sp-staking"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "parity-scale-codec",
  "sp-runtime",
@@ -6967,8 +7089,8 @@ dependencies = [
 
 [[package]]
 name = "sp-state-machine"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "hash-db",
  "log 0.4.8",
@@ -6986,13 +7108,13 @@ dependencies = [
 
 [[package]]
 name = "sp-std"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 
 [[package]]
 name = "sp-storage"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "impl-serde 0.2.3",
  "ref-cast",
@@ -7003,8 +7125,8 @@ dependencies = [
 
 [[package]]
 name = "sp-timestamp"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "impl-trait-for-tuples",
  "parity-scale-codec",
@@ -7017,16 +7139,16 @@ dependencies = [
 
 [[package]]
 name = "sp-tracing"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "tracing",
 ]
 
 [[package]]
 name = "sp-transaction-pool"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "derive_more 0.99.7",
  "futures 0.3.5",
@@ -7040,8 +7162,8 @@ dependencies = [
 
 [[package]]
 name = "sp-trie"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "hash-db",
  "memory-db",
@@ -7054,8 +7176,8 @@ dependencies = [
 
 [[package]]
 name = "sp-utils"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "futures-core",
@@ -7065,8 +7187,8 @@ dependencies = [
 
 [[package]]
 name = "sp-version"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "impl-serde 0.2.3",
  "parity-scale-codec",
@@ -7077,8 +7199,8 @@ dependencies = [
 
 [[package]]
 name = "sp-wasm-interface"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "impl-trait-for-tuples",
  "parity-scale-codec",
@@ -7165,9 +7287,9 @@ checksum = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
 dependencies = [
  "heck",
  "proc-macro-error",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -7186,9 +7308,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0054a7df764039a6cd8592b9de84be4bec368ff081d203a7d5371cbfa8e65c81"
 dependencies = [
  "heck",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -7205,8 +7327,8 @@ dependencies = [
 
 [[package]]
 name = "substrate-browser-utils"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "chrono",
  "clear_on_drop",
@@ -7232,16 +7354,16 @@ dependencies = [
 
 [[package]]
 name = "substrate-build-script-utils"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "platforms",
 ]
 
 [[package]]
 name = "substrate-frame-rpc-system"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "frame-system-rpc-runtime-api",
  "futures 0.3.5",
@@ -7261,10 +7383,10 @@ dependencies = [
 
 [[package]]
 name = "substrate-prometheus-endpoint"
-version = "0.8.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "0.8.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
- "async-std",
+ "async-std 1.6.0",
  "derive_more 0.99.7",
  "futures-util",
  "hyper 0.13.5",
@@ -7275,8 +7397,8 @@ dependencies = [
 
 [[package]]
 name = "substrate-test-client"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "hash-db",
@@ -7296,8 +7418,8 @@ dependencies = [
 
 [[package]]
 name = "substrate-test-runtime"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "cfg-if",
  "frame-executive",
@@ -7336,8 +7458,8 @@ dependencies = [
 
 [[package]]
 name = "substrate-test-runtime-client"
-version = "2.0.0-rc1"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+version = "2.0.0-rc2"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 dependencies = [
  "futures 0.3.5",
  "parity-scale-codec",
@@ -7357,7 +7479,7 @@ dependencies = [
 [[package]]
 name = "substrate-wasm-builder-runner"
 version = "1.0.6"
-source = "git+https://github.com/paritytech/substrate#ffcce8538f08ad64656ac5eb8da783dce1a79eae"
+source = "git+https://github.com/paritytech/substrate#2d39ec2c4aaec1cc0f91fcb91734de8f408dc1b2"
 
 [[package]]
 name = "substrate-wasm-builder-runner"
@@ -7490,11 +7612,11 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.23"
+version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95b5f192649e48a5302a13f2feb224df883b98933222369e4b3b0fe2a5447269"
+checksum = "ef781e621ee763a2a40721a8861ec519cb76966aee03bb5d00adb6a31dc1c1de"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
  "unicode-xid 0.2.0",
 ]
@@ -7505,9 +7627,9 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -7525,9 +7647,9 @@ version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "unicode-xid 0.2.0",
 ]
 
@@ -7661,22 +7783,22 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5976891d6950b4f68477850b5b9e5aa64d955961466f9e174363f573e54e8ca7"
+checksum = "b13f926965ad00595dd129fa12823b04bbf866e9085ab0a5f2b05b850fbfc344"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab81dbd1cd69cd2ce22ecfbdd3bdb73334ba25350649408cc6c085f46d89573d"
+checksum = "893582086c2f98cde18f906265a65b5030a074b1046c674ae898be6519a7f479"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -7825,7 +7947,7 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fb2d1b8f4548dbf5e1f7818512e9c406860678f29c300cdf0ebac72d1a3a1671"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "futures 0.1.29",
 ]
 
@@ -7857,7 +7979,7 @@ version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09bc590ec4ba8ba87652da2068d150dcada2cfa2e07faae270a5e0409aa51351"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "futures 0.1.29",
  "lazy_static",
  "log 0.4.8",
@@ -7914,7 +8036,7 @@ checksum = "df720b6581784c118f0eb4310796b12b1d242a7eb95f716a8367855325c25f89"
 dependencies = [
  "crossbeam-deque",
  "crossbeam-queue",
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "futures 0.1.29",
  "lazy_static",
  "log 0.4.8",
@@ -7929,7 +8051,7 @@ version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "93044f2d313c95ff1cb7809ce9a7a05735b012288a888b62d4434fd58c94f296"
 dependencies = [
- "crossbeam-utils",
+ "crossbeam-utils 0.7.2",
  "futures 0.1.29",
  "slab",
  "tokio-executor",
@@ -8014,9 +8136,9 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "99bbad0de3fd923c9c3232ead88510b783e5a4d16a6154adffa3d53308de984c"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
 ]
 
 [[package]]
@@ -8211,9 +8333,9 @@ checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
 [[package]]
 name = "version_check"
-version = "0.9.1"
+version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "078775d0255232fb988e6fccf26ddc9d1ac274299aaedcedce21c6f72cc533ce"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
 
 [[package]]
 name = "void"
@@ -8276,9 +8398,9 @@ dependencies = [
  "bumpalo",
  "lazy_static",
  "log 0.4.8",
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "wasm-bindgen-shared",
 ]
 
@@ -8310,9 +8432,9 @@ version = "0.2.62"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8eb197bd3a47553334907ffd2f16507b4f4f01bbec3ac921a7719e0decdfe72a"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
@@ -8475,6 +8597,25 @@ dependencies = [
  "webpki",
 ]
 
+[[package]]
+name = "wepoll-binding"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "374fff4ff9701ff8b6ad0d14bacd3156c44063632d8c136186ff5967d48999a7"
+dependencies = [
+ "bitflags",
+ "wepoll-sys",
+]
+
+[[package]]
+name = "wepoll-sys"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9082a777aed991f6769e2b654aa0cb29f1c3d615daf009829b07b66c7aff6a24"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "westend-runtime"
 version = "0.8.0"
@@ -8545,6 +8686,7 @@ dependencies = [
  "sp-transaction-pool",
  "sp-trie",
  "sp-version",
+ "static_assertions",
  "substrate-wasm-builder-runner 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "tiny-keccak 1.5.0",
  "trie-db",
@@ -8670,26 +8812,26 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de251eec69fc7c1bc3923403d18ececb929380e016afe103da75f396704f8ca2"
 dependencies = [
- "proc-macro2 1.0.13",
+ "proc-macro2 1.0.17",
  "quote 1.0.6",
- "syn 1.0.23",
+ "syn 1.0.27",
  "synstructure",
 ]
 
 [[package]]
 name = "zstd"
-version = "0.5.1+zstd.1.4.4"
+version = "0.5.2+zstd.1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c5d978b793ae64375b80baf652919b148f6a496ac8802922d9999f5a553194f"
+checksum = "644352b10ce7f333d6e0af85bd4f5322dc449416dc1211c6308e95bca8923db4"
 dependencies = [
  "zstd-safe",
 ]
 
 [[package]]
 name = "zstd-safe"
-version = "2.0.3+zstd.1.4.4"
+version = "2.0.4+zstd.1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bee25eac9753cfedd48133fa1736cbd23b774e253d89badbeac7d12b23848d3f"
+checksum = "7113c0c9aed2c55181f2d9f5b0a36e7d2c0183b11c058ab40b35987479efe4d7"
 dependencies = [
  "libc",
  "zstd-sys",
@@ -8697,11 +8839,12 @@ dependencies = [
 
 [[package]]
 name = "zstd-sys"
-version = "1.4.15+zstd.1.4.4"
+version = "1.4.16+zstd.1.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89719b034dc22d240d5b407fb0a3fe6d29952c181cff9a9f95c0bd40b4f8f7d8"
+checksum = "c442965efc45353be5a9b9969c9b0872fff6828c7e06d118dda2cb2d0bb11d5a"
 dependencies = [
  "cc",
  "glob",
+ "itertools 0.9.0",
  "libc",
 ]
diff --git a/runtime/common/Cargo.toml b/runtime/common/Cargo.toml
index 98c78b61efd9..4b65d681f26b 100644
--- a/runtime/common/Cargo.toml
+++ b/runtime/common/Cargo.toml
@@ -11,6 +11,7 @@ log = { version = "0.3.9", optional = true }
 rustc-hex = { version = "2.0.1", default-features = false }
 serde = { version = "1.0.102", default-features = false }
 serde_derive = { version = "1.0.102", optional = true }
+static_assertions = "1.1.0"
 
 sp-api = { git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 inherents = { package = "sp-inherents", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
diff --git a/runtime/common/src/claims.rs b/runtime/common/src/claims.rs
index 829e1f6621e1..f8c03ff5af44 100644
--- a/runtime/common/src/claims.rs
+++ b/runtime/common/src/claims.rs
@@ -684,7 +684,7 @@ mod tests {
 	}
 
 	parameter_types!{
-		pub const Prefix: &'static [u8] = b"Pay RUSTs to the TEST account:";
+		pub Prefix: &'static [u8] = b"Pay RUSTs to the TEST account:";
 	}
 
 	impl Trait for Test {
diff --git a/runtime/common/src/lib.rs b/runtime/common/src/lib.rs
index 293a83496ef9..e10a394c4e3e 100644
--- a/runtime/common/src/lib.rs
+++ b/runtime/common/src/lib.rs
@@ -38,7 +38,7 @@ use frame_support::{
 	parameter_types, traits::{Currency, Filter},
 	weights::{Weight, constants::WEIGHT_PER_SECOND},
 };
-
+use static_assertions::const_assert;
 pub use frame_support::weights::constants::{BlockExecutionWeight, ExtrinsicBaseWeight, RocksDbWeight};
 
 #[cfg(feature = "std")]
@@ -56,15 +56,17 @@ use sp_runtime::traits::Dispatchable;
 
 pub type NegativeImbalance<T> = <balances::Module<T> as Currency<<T as system::Trait>::AccountId>>::NegativeImbalance;
 
+const AVERAGE_ON_INITIALIZE_WEIGHT: Perbill = Perbill::from_percent(10);
 parameter_types! {
 	pub const BlockHashCount: BlockNumber = 2400;
 	pub const MaximumBlockWeight: Weight = 2 * WEIGHT_PER_SECOND;
 	pub const AvailableBlockRatio: Perbill = Perbill::from_percent(75);
-	pub const MaximumExtrinsicWeight: Weight = AvailableBlockRatio::get()
-		.saturating_sub(Perbill::from_percent(10)) * MaximumBlockWeight::get();
+	pub MaximumExtrinsicWeight: Weight = AvailableBlockRatio::get()
+		.saturating_sub(AVERAGE_ON_INITIALIZE_WEIGHT) * MaximumBlockWeight::get();
 	pub const MaximumBlockLength: u32 = 5 * 1024 * 1024;
 }
 
+const_assert!(AvailableBlockRatio::get().deconstruct() >= AVERAGE_ON_INITIALIZE_WEIGHT.deconstruct());
 
 /// Apply a given filter to transactions.
 pub struct TransactionCallFilter<T: Filter<Call>, Call>(PhantomData<(T, Call)>);
diff --git a/runtime/common/src/parachains.rs b/runtime/common/src/parachains.rs
index a343f130e153..8b503c914fc3 100644
--- a/runtime/common/src/parachains.rs
+++ b/runtime/common/src/parachains.rs
@@ -1811,7 +1811,7 @@ mod tests {
 	}
 
 	parameter_types! {
-		pub const OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
+		pub OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
 	}
 
 	impl offences::Trait for Test {
diff --git a/runtime/kusama/src/lib.rs b/runtime/kusama/src/lib.rs
index dd395fa2457b..28be46c111e5 100644
--- a/runtime/kusama/src/lib.rs
+++ b/runtime/kusama/src/lib.rs
@@ -35,7 +35,7 @@ use runtime_common::{attestations, claims, parachains, registrar, slots,
 };
 use sp_runtime::{
 	create_runtime_str, generic, impl_opaque_keys, ModuleId,
-	ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill, Perquintill,
+	ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill, Perquintill, PerThing,
 	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
 	curve::PiecewiseLinear,
 	traits::{
@@ -85,7 +85,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	impl_name: create_runtime_str!("parity-kusama"),
 	authoring_version: 2,
 	spec_version: 1064,
-	impl_version: 0,
+	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,
 };
@@ -190,10 +190,16 @@ impl balances::Trait for Runtime {
 
 parameter_types! {
 	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
-	// for a sane configuration, this should always be less than `AvailableBlockRatio`.
 	pub const TargetBlockFullness: Perquintill = Perquintill::from_percent(25);
 }
 
+// for a sane configuration, this should always be less than `AvailableBlockRatio`.
+const_assert!(
+	TargetBlockFullness::get().deconstruct() <
+	(AvailableBlockRatio::get().deconstruct() as <Perquintill as PerThing>::Inner)
+		* (<Perquintill as PerThing>::ACCURACY / <Perbill as PerThing>::ACCURACY as <Perquintill as PerThing>::Inner)
+);
+
 impl transaction_payment::Trait for Runtime {
 	type Currency = Balances;
 	type OnTransactionPayment = DealWithFees;
@@ -368,18 +374,17 @@ impl collective::Trait<CouncilCollective> for Runtime {
 	type MaxProposals = CouncilMaxProposals;
 }
 
-const DESIRED_MEMBERS: u32 = 17;
 parameter_types! {
 	pub const CandidacyBond: Balance = 1 * DOLLARS;
 	pub const VotingBond: Balance = 5 * CENTS;
 	/// Daily council elections.
 	pub const TermDuration: BlockNumber = 24 * HOURS;
-	pub const DesiredMembers: u32 = DESIRED_MEMBERS;
+	pub const DesiredMembers: u32 = 17;
 	pub const DesiredRunnersUp: u32 = 7;
 	pub const ElectionsPhragmenModuleId: LockIdentifier = *b"phrelect";
 }
 // Make sure that there are no more than MAX_MEMBERS members elected via phragmen.
-const_assert!(DESIRED_MEMBERS <= collective::MAX_MEMBERS);
+const_assert!(DesiredMembers::get() <= collective::MAX_MEMBERS);
 
 impl elections_phragmen::Trait for Runtime {
 	type Event = Event;
@@ -455,7 +460,7 @@ impl treasury::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
+	pub OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
 }
 
 impl offences::Trait for Runtime {
@@ -507,8 +512,8 @@ impl grandpa::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
-	pub const ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
+	pub WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
+	pub ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
 }
 
 impl finality_tracker::Trait for Runtime {
@@ -648,7 +653,7 @@ impl slots::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const Prefix: &'static [u8] = b"Pay KSMs to the Kusama account:";
+	pub Prefix: &'static [u8] = b"Pay KSMs to the Kusama account:";
 }
 
 impl claims::Trait for Runtime {
diff --git a/runtime/polkadot/src/lib.rs b/runtime/polkadot/src/lib.rs
index c3e03911cddb..adc189d1492f 100644
--- a/runtime/polkadot/src/lib.rs
+++ b/runtime/polkadot/src/lib.rs
@@ -36,7 +36,7 @@ use primitives::{
 };
 use sp_runtime::{
 	create_runtime_str, generic, impl_opaque_keys, ModuleId,
-	ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill, Perquintill,
+	ApplyExtrinsicResult, KeyTypeId, Percent, Permill, Perbill, Perquintill, PerThing,
 	transaction_validity::{
 		TransactionValidity, TransactionSource, TransactionPriority,
 	},
@@ -213,10 +213,16 @@ impl balances::Trait for Runtime {
 
 parameter_types! {
 	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
-	// for a sane configuration, this should always be less than `AvailableBlockRatio`.
 	pub const TargetBlockFullness: Perquintill = Perquintill::from_percent(25);
 }
 
+// for a sane configuration, this should always be less than `AvailableBlockRatio`.
+const_assert!(
+	TargetBlockFullness::get().deconstruct() <
+	(AvailableBlockRatio::get().deconstruct() as <Perquintill as PerThing>::Inner)
+		* (<Perquintill as PerThing>::ACCURACY / <Perbill as PerThing>::ACCURACY as <Perquintill as PerThing>::Inner)
+);
+
 impl transaction_payment::Trait for Runtime {
 	type Currency = Balances;
 	type OnTransactionPayment = DealWithFees;
@@ -390,19 +396,18 @@ impl collective::Trait<CouncilCollective> for Runtime {
 	type MaxProposals = CouncilMaxProposals;
 }
 
-const DESIRED_MEMBERS: u32 = 13;
 parameter_types! {
 	pub const CandidacyBond: Balance = 100 * DOLLARS;
 	pub const VotingBond: Balance = 5 * DOLLARS;
 	/// Weekly council elections initially, later monthly.
 	pub const TermDuration: BlockNumber = 7 * DAYS;
 	/// 13 members initially, to be increased to 23 eventually.
-	pub const DesiredMembers: u32 = DESIRED_MEMBERS;
+	pub const DesiredMembers: u32 = 13;
 	pub const DesiredRunnersUp: u32 = 20;
 	pub const ElectionsPhragmenModuleId: LockIdentifier = *b"phrelect";
 }
 // Make sure that there are no more than MAX_MEMBERS members elected via phragmen.
-const_assert!(DESIRED_MEMBERS <= collective::MAX_MEMBERS);
+const_assert!(DesiredMembers::get() <= collective::MAX_MEMBERS);
 
 impl elections_phragmen::Trait for Runtime {
 	type Event = Event;
@@ -478,7 +483,7 @@ impl treasury::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
+	pub OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
 }
 
 impl offences::Trait for Runtime {
@@ -530,8 +535,8 @@ impl grandpa::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
-	pub const ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
+	pub WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
+	pub ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
 }
 
 impl finality_tracker::Trait for Runtime {
@@ -673,7 +678,7 @@ impl slots::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const Prefix: &'static [u8] = b"Pay DOTs to the Polkadot account:";
+	pub Prefix: &'static [u8] = b"Pay DOTs to the Polkadot account:";
 }
 
 impl claims::Trait for Runtime {
diff --git a/runtime/test-runtime/src/lib.rs b/runtime/test-runtime/src/lib.rs
index ff7c22efa340..bb89250c2b78 100644
--- a/runtime/test-runtime/src/lib.rs
+++ b/runtime/test-runtime/src/lib.rs
@@ -200,7 +200,6 @@ impl balances::Trait for Runtime {
 
 parameter_types! {
 	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
-	// for a sane configuration, this should always be less than `AvailableBlockRatio`.
 	pub const TargetBlockFullness: Perquintill = Perquintill::from_percent(25);
 }
 
@@ -424,7 +423,7 @@ impl system::offchain::SigningTypes for Runtime {
 }
 
 parameter_types! {
-	pub const OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
+	pub OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
 }
 
 impl offences::Trait for Runtime {
@@ -465,7 +464,7 @@ impl slots::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const Prefix: &'static [u8] = b"Pay KSMs to the Kusama account:";
+	pub Prefix: &'static [u8] = b"Pay KSMs to the Kusama account:";
 }
 
 impl claims::Trait for Runtime {
diff --git a/runtime/westend/Cargo.toml b/runtime/westend/Cargo.toml
index 14ba9dc0bafb..181f872c0f4d 100644
--- a/runtime/westend/Cargo.toml
+++ b/runtime/westend/Cargo.toml
@@ -13,6 +13,7 @@ rustc-hex = { version = "2.0.1", default-features = false }
 serde = { version = "1.0.102", default-features = false }
 serde_derive = { version = "1.0.102", optional = true }
 smallvec = "1.4.0"
+static_assertions = "1.1.0"
 
 authority-discovery-primitives = { package = "sp-authority-discovery", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
 babe-primitives = { package = "sp-consensus-babe", git = "https://github.com/paritytech/substrate", branch = "master", default-features = false }
diff --git a/runtime/westend/src/lib.rs b/runtime/westend/src/lib.rs
index eb51cdc000fa..c78bce274271 100644
--- a/runtime/westend/src/lib.rs
+++ b/runtime/westend/src/lib.rs
@@ -21,6 +21,7 @@
 #![recursion_limit="256"]
 
 use sp_std::prelude::*;
+use static_assertions::const_assert;
 use codec::{Encode, Decode};
 use primitives::{
 	AccountId, AccountIndex, Balance, BlockNumber, Hash, Nonce, Signature, Moment,
@@ -34,7 +35,7 @@ use runtime_common::{attestations, parachains, registrar,
 };
 use sp_runtime::{
 	create_runtime_str, generic, impl_opaque_keys,
-	ApplyExtrinsicResult, KeyTypeId, Perbill, Perquintill, curve::PiecewiseLinear,
+	ApplyExtrinsicResult, KeyTypeId, Perbill, Perquintill, curve::PiecewiseLinear, PerThing,
 	transaction_validity::{TransactionValidity, TransactionSource, TransactionPriority},
 	traits::{
 		BlakeTwo256, Block as BlockT, OpaqueKeys, ConvertInto, IdentityLookup,
@@ -179,10 +180,16 @@ impl balances::Trait for Runtime {
 
 parameter_types! {
 	pub const TransactionByteFee: Balance = 10 * MILLICENTS;
-	// for a sane configuration, this should always be less than `AvailableBlockRatio`.
 	pub const TargetBlockFullness: Perquintill = Perquintill::from_percent(25);
 }
 
+// for a sane configuration, this should always be less than `AvailableBlockRatio`.
+const_assert!(
+	TargetBlockFullness::get().deconstruct() <
+	(AvailableBlockRatio::get().deconstruct() as <Perquintill as PerThing>::Inner)
+		* (<Perquintill as PerThing>::ACCURACY / <Perbill as PerThing>::ACCURACY as <Perquintill as PerThing>::Inner)
+);
+
 impl transaction_payment::Trait for Runtime {
 	type Currency = Balances;
 	type OnTransactionPayment = ToAuthor<Runtime>;
@@ -309,7 +316,7 @@ parameter_types! {
 }
 
 parameter_types! {
-	pub const OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
+	pub OffencesWeightSoftLimit: Weight = Perbill::from_percent(60) * MaximumBlockWeight::get();
 }
 
 impl offences::Trait for Runtime {
@@ -361,8 +368,8 @@ impl grandpa::Trait for Runtime {
 }
 
 parameter_types! {
-	pub const WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
-	pub const ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
+	pub WindowSize: BlockNumber = finality_tracker::DEFAULT_WINDOW_SIZE.into();
+	pub ReportLatency: BlockNumber = finality_tracker::DEFAULT_REPORT_LATENCY.into();
 }
 
 impl finality_tracker::Trait for Runtime {