chore: bring in github.com/orijtech/chdbg tool

Signed-off-by: Elias Naur <elias@orijtech.com>

tools/chdbg/README.md

@@ -0,0 +1,28 @@
+# chdbg
+Command `chdbg` is a debugger for determining the root cause of a Cosmos chain halt.
+Its initial release can analyze two databases and output their differences. As an
+example, here's the output when run on the example directories from
+[`iavlviewer`](https://github.com/cosmos/iavl/tree/master/cmd/iaviewer):
+
+```
+go run cosmossdk.io/tools/chdbg bns-a.db bns-b.db
+chdbg: hash mismatch: 96AAD58DBDF2BA87D90BE1F620E80AC3D1662B5113A7667B51303596163A5969 != 56E581EBD9C0A3D726A91579839F7FF8A9251BEB063FDF0FA0415A0B3429DF6E
+chdbg: key _i.bchnft_owner:4C97A7423B1782D7C8CAB362247B848DEC96B1EC: key proofs differ
+chdbg: key _i.bchnft_owner:E28AE9A6EB94FC88B73EB7CBD6B87BF93EB9BEF0: key proofs differ
+chdbg: key _i.tkrnft_owner:E28AE9A6EB94FC88B73EB7CBD6B87BF93EB9BEF0: key proofs differ
+chdbg: key _i.usrnft_chainaddr:1152542575310734325L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdbg: key _i.usrnft_chainaddr:12256717727036376470L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdbg: key _i.usrnft_chainaddr:14285752342776807606L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdbg: key _i.usrnft_chainaddr:177168082075485743L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdbg: key _i.usrnft_chainaddr:2980033962229439650L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdbg: key _i.usrnft_chainaddr:3070406526139113375L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdbg: key _i.usrnft_chainaddr:8565302995323734695L;da3ed6a45429278bac2666961289ca17ad86595d33b31037615d4b8e8f158bba: key proofs differ
+chdgb: ... (additional diffs omitted)
+chdbg: database mismatch at version 190258 with 88 differences
+exit status 2
+```
+
+It is expected that the tool will develop to cover more chain halt causes.
+
+# LICENSE
+Copyright Cosmos Network Authors. All Rights Reserved.

tools/chdbg/go.mod

@@ -0,0 +1,42 @@
+module cosmossdk.io/tools/chdbg
+
+go 1.19
+
+require (
+	github.com/cosmos/cosmos-db v0.0.0-20221127110041-4564dc28e22b
+	github.com/cosmos/iavl v0.19.2-0.20221208111139-992120de42e1
+)
+
+require (
+	github.com/DataDog/zstd v1.4.5 // indirect
+	github.com/HdrHistogram/hdrhistogram-go v1.1.2 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
+	github.com/cockroachdb/errors v1.8.1 // indirect
+	github.com/cockroachdb/logtags v0.0.0-20190617123548-eb05cc24525f // indirect
+	github.com/cockroachdb/pebble v0.0.0-20220817183557-09c6e030a677 // indirect
+	github.com/cockroachdb/redact v1.0.8 // indirect
+	github.com/cockroachdb/sentry-go v0.6.1-cockroachdb.2 // indirect
+	github.com/confio/ics23/go v0.9.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/google/btree v1.1.2 // indirect
+	github.com/jmhodges/levigo v1.0.0 // indirect
+	github.com/klauspost/compress v1.15.9 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/linxGnu/grocksdb v1.7.5 // indirect
+	github.com/onsi/ginkgo v1.16.4 // indirect
+	github.com/onsi/gomega v1.18.1 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rogpeppe/go-internal v1.9.0 // indirect
+	github.com/spf13/cast v1.5.0 // indirect
+	github.com/stretchr/testify v1.8.1 // indirect
+	github.com/syndtr/goleveldb v1.0.1-0.20200815110645-5c35d600f0ca // indirect
+	golang.org/x/crypto v0.4.0 // indirect
+	golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e // indirect
+	golang.org/x/sys v0.3.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20200902074654-038fdea0a05b // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)