feat: return timestamp from GetIDs

.github/workflows/lint.yml

@@ -52,5 +52,9 @@ jobs:
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@v4
+      - name: set up go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
       - run: make proto-gen
       - run: make proto-lint

.github/workflows/proto.yml

@@ -9,6 +9,10 @@ jobs:
     timeout-minutes: 5
     steps:
       - uses: actions/checkout@v4
+      - name: set up go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
       - name: "Check protobuf generated code matches committed code"
         # yamllint disable
         run: |

Makefile

@@ -65,14 +65,21 @@ test: vet
 	@go test -v -race -covermode=atomic -coverprofile=coverage.txt $(pkgs) -run $(run) -count=$(count)
 .PHONY: test
 
-## proto-gen: Generate protobuf files. Requires docker.
-proto-gen:
+## check-proto-deps: Check protobuf deps
+check-proto-deps:
+ifeq (,$(shell which protoc-gen-gocosmos))
+	@go install github.com/cosmos/gogoproto/protoc-gen-gocosmos@latest
+endif
+.PHONY: check-proto-deps
+
+## proto-gen: Generate protobuf files
+proto-gen: check-proto-deps
 	@echo "--> Generating Protobuf files"
-	./proto/gen.sh
+	@go run github.com/bufbuild/buf/cmd/buf@latest generate --path proto/da
 .PHONY: proto-gen
 
-## proto-lint: Lint protobuf files. Requires docker.
-proto-lint:
+## proto-lint: Lint protobuf files.
+proto-lint: check-proto-deps
 	@echo "--> Linting Protobuf files"
-	@$(DOCKER_BUF) lint --error-format=json
+	@go run github.com/bufbuild/buf/cmd/buf@latest lint --error-format=json
 .PHONY: proto-lint

buf.gen.yaml

@@ -3,8 +3,13 @@ version: v1beta1
 # The plugins to run.
 plugins:
   # The name of the plugin.
-  - name: gogofaster
+  - name: gocosmos
      # The the relative output directory.
     out: types/pb
     # Any options to provide to the plugin.
-    opt: plugins=grpc,paths=source_relative
+    opt:
+      - Mgoogle/protobuf/timestamp.proto=github.com/cosmos/gogoproto/types
+      - Mgoogle/protobuf/duration.proto=github.com/golang/protobuf/ptypes/duration
+      - Mgoogle/protobuf/wrappers.proto=github.com/cosmos/gogoproto/types
+      - plugins=grpc
+      - paths=source_relative

buf.lock

@@ -0,0 +1,8 @@
+# Generated by buf. DO NOT EDIT.
+version: v1beta1
+deps:
+  - remote: buf.build
+    owner: cosmos
+    repository: gogo-proto
+    commit: 88ef6483f90f478fb938c37dde52ece3
+    digest: shake256:89c45df2aa11e0cff97b0d695436713db3d993d76792e9f8dc1ae90e6ab9a9bec55503d48ceedd6b86069ab07d3041b32001b2bfe0227fa725dd515ff381e5ba

buf.yaml

@@ -1,12 +1,13 @@
 version: v1beta1
-
+deps:
+  - buf.build/cosmos/gogo-proto
 build:
   roots:
     - proto
     - third_party/proto
 lint:
   use:
-    - DEFAULT
+    - STANDARD
     - COMMENTS
     - FILE_LOWER_SNAKE_CASE
   except:

da.go

@@ -1,6 +1,9 @@
 package da
 
-import "context"
+import (
+	"context"
+	"time"
+)
 
 // DA defines very generic interface for interaction with Data Availability layers.
 type DA interface {
@@ -14,7 +17,7 @@ type DA interface {
 	Get(ctx context.Context, ids []ID, namespace Namespace) ([]Blob, error)
 
 	// GetIDs returns IDs of all Blobs located in DA at given height.
-	GetIDs(ctx context.Context, height uint64, namespace Namespace) ([]ID, error)
+	GetIDs(ctx context.Context, height uint64, namespace Namespace) (*GetIDsResult, error)
 
 	// GetProofs returns inclusion Proofs for Blobs specified by their IDs.
 	GetProofs(ctx context.Context, ids []ID, namespace Namespace) ([]Proof, error)
@@ -53,3 +56,9 @@ type Commitment = []byte
 
 // Proof should contain serialized proof of inclusion (publication) of Blob in Data Availability layer.
 type Proof = []byte
+
+// GetIDsResult holds the result of GetIDs call: IDs and timestamp of corresponding block.
+type GetIDsResult struct {
+	IDs       []ID
+	Timestamp time.Time
+}

go.mod

@@ -3,8 +3,8 @@ module github.com/rollkit/go-da
 go 1.21.1
 
 require (
+	github.com/cosmos/gogoproto v1.7.0
 	github.com/filecoin-project/go-jsonrpc v0.6.0
-	github.com/gogo/protobuf v1.3.2
 	github.com/ipfs/go-log/v2 v2.5.1
 	github.com/stretchr/testify v1.9.0
 	google.golang.org/grpc v1.66.2
@@ -13,6 +13,7 @@ require (
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/websocket v1.4.2 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
@@ -26,7 +27,7 @@ require (
 	golang.org/x/text v0.16.0 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240604185151-ef581f913117 // indirect
-	google.golang.org/protobuf v1.34.1 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
 

go.sum

@@ -3,19 +3,21 @@ github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cosmos/gogoproto v1.7.0 h1:79USr0oyXAbxg3rspGh/m4SWNyoz/GLaAh0QlCe2fro=
+github.com/cosmos/gogoproto v1.7.0/go.mod h1:yWChEv5IUEYURQasfyBW5ffkMHR/90hiHgbNgrtp4j0=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/filecoin-project/go-jsonrpc v0.6.0 h1:/fFJIAN/k6EgY90m7qbyfY28woMwyseZmh2gVs5sYjY=
 github.com/filecoin-project/go-jsonrpc v0.6.0/go.mod h1:/n/niXcS4ZQua6i37LcVbY1TmlJR0UIK9mDFQq2ICek=
-github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
-github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69NZV8Q=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 h1:ZgQEtGgCBiWRM39fZuwSd1LwSqqSW0hOdXCYYDX0R3I=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
@@ -25,8 +27,6 @@ github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0U
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
 github.com/ipfs/go-log/v2 v2.5.1 h1:1XdUzF7048prq4aBjDQQ4SL5RxftpRGdXhNRwKSAlcY=
 github.com/ipfs/go-log/v2 v2.5.1/go.mod h1:prSpmC1Gpllc9UYWxDiZDreBYw7zp4Iqp1kOLU9U5UI=
-github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
-github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+oQHNcck=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
@@ -44,8 +44,6 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
-github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
-github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
@@ -59,23 +57,18 @@ go.uber.org/zap v1.19.1 h1:ue41HOKd1vGURxrmeKIgELGb3jPW9DMUDGtsinblHwI=
 go.uber.org/zap v1.19.1/go.mod h1:j3DNczoxDZroyBnOT1L/Q79cfUMGZxlv/9dzN7SM1rI=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/lint v0.0.0-20181026193005-c67002cb31c3/go.mod h1:UVdnD1Gm6xHRNCYTkRU2/jEulfH38KcIWyp/GAMgvoE=
 golang.org/x/lint v0.0.0-20190227174305-5b3e6a55c961/go.mod h1:wehouNa3lNwaWXcvxsM5YxQ5yQlVC4a0KAMCusXpPoU=
 golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ=
 golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE=
@@ -84,14 +77,11 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190502145724-3ef323f4f1fd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -109,12 +99,9 @@ golang.org/x/tools v0.0.0-20190114222345-bf090417da8b/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20190226205152-f727befe758c/go.mod h1:9Yl7xja0Znq3iFh3HoIrodX9oNMXvdceNzlUR8zjMvY=
 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
-golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
-golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
@@ -127,8 +114,8 @@ google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZi
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.66.2 h1:3QdXkuq3Bkh7w+ywLdLvM56cmGvQHUMZpiCzt6Rqaoo=
 google.golang.org/grpc v1.66.2/go.mod h1:s3/l6xSSCURdVfAnL+TqCNMyTDAGN6+lZeVxnZR128Y=
-google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
-google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

proto/da/da.proto

@@ -1,6 +1,8 @@
 syntax = "proto3";
 package da;
 
+import "google/protobuf/timestamp.proto";
+
 // DAService is the protobuf service definition for interaction with Data Availability layers.
 service DAService {
     // MaxBlobSize returns the maximum blob size
@@ -79,6 +81,7 @@ message GetIdsRequest {
 // GetIdsResponse is the response type for the GetIds rpc method.
 message GetIdsResponse {
 	repeated ID ids = 1;
+  google.protobuf.Timestamp timestamp = 2;
 }
 
 // GetProofsRequest is the request type for the GetProofs rpc method.

proxy/grpc/client.go

@@ -3,6 +3,7 @@ package grpc
 import (
 	"context"
 
+	"github.com/cosmos/gogoproto/types"
 	"google.golang.org/grpc"
 
 	"github.com/rollkit/go-da"
@@ -65,14 +66,18 @@ func (c *Client) Get(ctx context.Context, ids []da.ID, namespace da.Namespace) (
 }
 
 // GetIDs returns IDs of all Blobs located in DA at given height.
-func (c *Client) GetIDs(ctx context.Context, height uint64, namespace da.Namespace) ([]da.ID, error) {
+func (c *Client) GetIDs(ctx context.Context, height uint64, namespace da.Namespace) (*da.GetIDsResult, error) {
 	req := &pbda.GetIdsRequest{Height: height, Namespace: &pbda.Namespace{Value: namespace}}
 	resp, err := c.client.GetIds(ctx, req)
 	if err != nil {
 		return nil, err
 	}
 
-	return idsPB2DA(resp.Ids), nil
+	timestamp, err := types.TimestampFromProto(resp.Timestamp)
+	if err != nil {
+		return nil, err
+	}
+	return &da.GetIDsResult{IDs: idsPB2DA(resp.Ids), Timestamp: timestamp}, nil
 }
 
 // GetProofs returns inclusion Proofs for all Blobs located in DA at given height.

proxy/grpc/server.go

@@ -3,6 +3,7 @@ package grpc
 import (
 	"context"
 
+	"github.com/cosmos/gogoproto/types"
 	"google.golang.org/grpc"
 
 	"github.com/rollkit/go-da"
@@ -38,12 +39,16 @@ func (p *proxySrv) Get(ctx context.Context, request *pbda.GetRequest) (*pbda.Get
 }
 
 func (p *proxySrv) GetIds(ctx context.Context, request *pbda.GetIdsRequest) (*pbda.GetIdsResponse, error) {
-	ids, err := p.target.GetIDs(ctx, request.Height, request.Namespace.GetValue())
+	ret, err := p.target.GetIDs(ctx, request.Height, request.Namespace.GetValue())
 	if err != nil {
 		return nil, err
 	}
 
-	return &pbda.GetIdsResponse{Ids: idsDA2PB(ids)}, nil
+	timestamp, err := types.TimestampProto(ret.Timestamp)
+	if err != nil {
+		return nil, err
+	}
+	return &pbda.GetIdsResponse{Ids: idsDA2PB(ret.IDs), Timestamp: timestamp}, nil
 }
 
 func (p *proxySrv) Commit(ctx context.Context, request *pbda.CommitRequest) (*pbda.CommitResponse, error) {

proxy/jsonrpc/client.go

@@ -22,7 +22,7 @@ type API struct {
 	Internal struct {
 		MaxBlobSize       func(ctx context.Context) (uint64, error)                                            `perm:"read"`
 		Get               func(ctx context.Context, ids []da.ID, ns da.Namespace) ([]da.Blob, error)           `perm:"read"`
-		GetIDs            func(ctx context.Context, height uint64, ns da.Namespace) ([]da.ID, error)           `perm:"read"`
+		GetIDs            func(ctx context.Context, height uint64, ns da.Namespace) (*da.GetIDsResult, error)  `perm:"read"`
 		GetProofs         func(ctx context.Context, ids []da.ID, ns da.Namespace) ([]da.Proof, error)          `perm:"read"`
 		Commit            func(ctx context.Context, blobs []da.Blob, ns da.Namespace) ([]da.Commitment, error) `perm:"read"`
 		Validate          func(context.Context, []da.ID, []da.Proof, da.Namespace) ([]bool, error)             `perm:"read"`
@@ -42,7 +42,7 @@ func (api *API) Get(ctx context.Context, ids []da.ID, ns da.Namespace) ([]da.Blo
 }
 
 // GetIDs returns IDs of all Blobs located in DA at given height.
-func (api *API) GetIDs(ctx context.Context, height uint64, ns da.Namespace) ([]da.ID, error) {
+func (api *API) GetIDs(ctx context.Context, height uint64, ns da.Namespace) (*da.GetIDsResult, error) {
 	return api.Internal.GetIDs(ctx, height, ns)
 }