diff --git a/examples/stream_events/main.go b/examples/stream_events/main.go index b704cc037..e74816cef 100644 --- a/examples/stream_events/main.go +++ b/examples/stream_events/main.go @@ -34,11 +34,10 @@ func main() { func demo() { ctx := context.Background() - flowClient, err := grpc.NewClient("access-003.devnet46.nodes.onflow.org:9000") + flowClient, err := grpc.NewClient("access.testnet.nodes.onflow.org:9000") examples.Handle(err) block, err := flowClient.GetLatestBlock(ctx, true) - // block, err := flowClient.GetBlockByID(ctx, flow.HexToID("7582cc6e1bb5ca1784e309ca63013e9b7ecf34b74bf7fdb029aa0faa0deb7958err")) examples.Handle(err) fmt.Printf("Block Height: %d\n", block.Height) fmt.Printf("Block ID: %s\n", block.ID) diff --git a/examples/stream_events_reconnect/main.go b/examples/stream_events_reconnect/main.go new file mode 100644 index 000000000..c670adfe7 --- /dev/null +++ b/examples/stream_events_reconnect/main.go @@ -0,0 +1,107 @@ +/* + * Flow Go SDK + * + * Copyright 2019 Dapper Labs, Inc. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package main + +import ( + "context" + "fmt" + + "github.com/onflow/flow-go-sdk/access/grpc" + + "github.com/onflow/flow-go-sdk" + "github.com/onflow/flow-go-sdk/examples" +) + +func main() { + demo() +} + +// This is an example of streaming events, and handling reconnect when errors are encountered on the stream. + +func demo() { + ctx := context.Background() + flowClient, err := grpc.NewClient("access.testnet.nodes.onflow.org:9000") + examples.Handle(err) + + block, err := flowClient.GetLatestBlock(ctx, true) + examples.Handle(err) + fmt.Printf("Block Height: %d\n", block.Height) + fmt.Printf("Block ID: %s\n", block.ID) + + data, errChan, initErr := flowClient.SubscribeEvents(ctx, block.ID, 0, flow.EventFilter{}) + examples.Handle(initErr) + + reconnect := func(height uint64) { + fmt.Printf("Reconnecting at block %d\n", height) + + var err error + flowClient, err = grpc.NewClient("access.testnet.nodes.onflow.org:9000") + examples.Handle(err) + + data, errChan, err = flowClient.SubscribeEvents(ctx, flow.EmptyID, height, flow.EventFilter{}) + examples.Handle(err) + } + + // track the most recently seen block height. we will use this when reconnecting + lastHeight := block.Height + for { + select { + case <-ctx.Done(): + return + + case eventData, ok := <-data: + if !ok { + if ctx.Err() != nil { + return // graceful shutdown + } + // unexpected close + reconnect(lastHeight + 1) + continue + } + + fmt.Printf("~~~ Height: %d ~~~\n", eventData.Height) + printEvents(eventData.Events) + + lastHeight = eventData.Height + + case err, ok := <-errChan: + if !ok { + if ctx.Err() != nil { + return // graceful shutdown + } + // unexpected close + reconnect(lastHeight + 1) + continue + } + + fmt.Printf("~~~ ERROR: %s ~~~\n", err.Error()) + reconnect(lastHeight + 1) + continue + } + } + +} + +func printEvents(events []flow.Event) { + for _, event := range events { + fmt.Printf("\nType: %s\n", event.Type) + fmt.Printf("Values: %v\n", event.Value) + fmt.Printf("Transaction ID: %s\n", event.TransactionID) + } +} diff --git a/go.mod b/go.mod index 84c6bf5be..ff5213717 100644 --- a/go.mod +++ b/go.mod @@ -11,7 +11,7 @@ require ( github.com/onflow/cadence v0.42.5 github.com/onflow/crypto v0.24.9 github.com/onflow/flow-cli/flowkit v1.8.0 - github.com/onflow/flow/protobuf/go/flow v0.3.2-0.20231121210617-52ee94b830c2 + github.com/onflow/flow/protobuf/go/flow v0.3.2-0.20231121210617-52ee94b830c2 github.com/onflow/sdks v0.5.0 github.com/pkg/errors v0.9.1 github.com/spf13/afero v1.10.0 @@ -66,21 +66,18 @@ require ( github.com/stretchr/objx v0.5.0 // indirect github.com/texttheater/golang-levenshtein/levenshtein v0.0.0-20200805054039-cae8b0eaed6c // indirect github.com/turbolent/prettier v0.0.0-20220320183459-661cc755135d // indirect - github.com/vektra/mockery v1.1.2 // indirect github.com/x448/float16 v0.8.4 // indirect github.com/zeebo/blake3 v0.2.3 // indirect go.opencensus.io v0.24.0 // indirect go.opentelemetry.io/otel v1.16.0 // indirect golang.org/x/crypto v0.14.0 // indirect golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect - golang.org/x/mod v0.12.0 // indirect golang.org/x/net v0.17.0 // indirect golang.org/x/oauth2 v0.13.0 // indirect golang.org/x/sync v0.5.0 // indirect golang.org/x/sys v0.13.0 // indirect golang.org/x/text v0.13.0 // indirect golang.org/x/time v0.3.0 // indirect - golang.org/x/tools v0.13.0 // indirect golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect google.golang.org/appengine v1.6.7 // indirect google.golang.org/genproto/googleapis/api v0.0.0-20231016165738-49dd2c1f3d0b // indirect diff --git a/go.sum b/go.sum index 8c9868a75..417407667 100644 --- a/go.sum +++ b/go.sum @@ -80,7 +80,6 @@ github.com/bits-and-blooms/bitset v1.7.0/go.mod h1:gIdJ4wp64HaoK2YrL1Q5/N7Y16edY github.com/btcsuite/btcd/btcec/v2 v2.2.1 h1:xP60mv8fvp+0khmrN0zTdPC3cNm24rfeE6lh2R/Yv3E= github.com/btcsuite/btcd/btcec/v2 v2.2.1/go.mod h1:9/CSmJxmuvqzX9Wh2fXMWToLOHhPd11lSPuIupwTkI8= github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= -github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc= github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI= github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI= github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU= @@ -187,7 +186,6 @@ github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1: github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc= github.com/invopop/jsonschema v0.7.0 h1:2vgQcBz1n256N+FpX3Jq7Y17AjYt46Ig3zIWyy770So= github.com/invopop/jsonschema v0.7.0/go.mod h1:O9uiLokuu0+MGFlyiaqtWxwqJm41/+8Nj0lD7A36YH0= -github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo= github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU= github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/XSXhF0NWZEnDohbsk= github.com/k0kubun/pp/v3 v3.2.0 h1:h33hNTZ9nVFNP3u2Fsgz8JXiF5JINoZfFq4SvKJwNcs= @@ -196,7 +194,6 @@ github.com/kisielk/gotool v1.0.0/go.mod h1:XhKaO+MFFWcvkIS/tQcRk01m1F5IRFswLeQ+o github.com/klauspost/cpuid/v2 v2.0.12/go.mod h1:g2LTdtYhdyuGPqyWyv7qRAmj1WBqxuObKfj5c0PQa7c= github.com/klauspost/cpuid/v2 v2.2.5 h1:0E5MSMDEoAulmXNFquVs//DdoomxaoTY1kUhbc/qbZg= github.com/klauspost/cpuid/v2 v2.2.5/go.mod h1:Lcz8mBdAVJIBVzewtcLocK12l3Y+JytZYpaMropDUws= -github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ= github.com/kr/fs v0.1.0/go.mod h1:FFnZGqtBN9Gxj7eW1uZ42v5BccTP0vu6NEaFoC2HwRg= github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo= github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI= @@ -222,8 +219,6 @@ github.com/onflow/crypto v0.24.9 h1:jYP1qdwid0qCineFzBFlxBchg710A7RuSWpTqxaOdog= github.com/onflow/crypto v0.24.9/go.mod h1:J/V7IEVaqjDajvF8K0B/SJPJDgAOP2G+LVLeb0hgmbg= github.com/onflow/flow-cli/flowkit v1.8.0 h1:unc+tx43yLNU6FdjvJUqivB45gmci+kaUk6szTNMJV0= github.com/onflow/flow-cli/flowkit v1.8.0/go.mod h1:3qW2eV6N3hzMO4e5NHjQei9A5Jcy62Kc/FPgaWk1CP0= -github.com/onflow/flow/protobuf/go/flow v0.3.2-0.20231018182244-e72527c55c63 h1:SX8OhYbyKBExhy4qEDR/Hw6MVTBTzlDb8LfCHfFyte4= -github.com/onflow/flow/protobuf/go/flow v0.3.2-0.20231018182244-e72527c55c63/go.mod h1:NA2pX2nw8zuaxfKphhKsk00kWLwfd+tv8mS23YXO4Sk= github.com/onflow/flow/protobuf/go/flow v0.3.2-0.20231121210617-52ee94b830c2 h1:qZjl4wSTG/E9znEjkHF0nNaEdlBLJoOEAtr7xUsTNqc= github.com/onflow/flow/protobuf/go/flow v0.3.2-0.20231121210617-52ee94b830c2/go.mod h1:NA2pX2nw8zuaxfKphhKsk00kWLwfd+tv8mS23YXO4Sk= github.com/onflow/sdks v0.5.0 h1:2HCRibwqDaQ1c9oUApnkZtEAhWiNY2GTpRD5+ftdkN8= @@ -245,11 +240,9 @@ github.com/sirupsen/logrus v1.9.0/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVs github.com/spf13/afero v1.10.0 h1:EaGW2JJh15aKOejeuJ+wpFSHnbd7GE6Wvp3TsNhb6LY= github.com/spf13/afero v1.10.0/go.mod h1:UBogFpq8E9Hx+xc5CNTTEpTnuHVmXDwZcZcE1eb/UhQ= github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= -github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw= github.com/stretchr/objx v0.5.0 h1:1zr/of2m5FGMsad5YfcqgdqdWrIhu+EBEJRhR1U7z/c= github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo= -github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= github.com/stretchr/testify v1.3.1-0.20190311161405-34c6fa2dc709/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4= github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA= @@ -264,8 +257,6 @@ github.com/texttheater/golang-levenshtein/levenshtein v0.0.0-20200805054039-cae8 github.com/texttheater/golang-levenshtein/levenshtein v0.0.0-20200805054039-cae8b0eaed6c/go.mod h1:JlzghshsemAMDGZLytTFY8C1JQxQPhnatWqNwUXjggo= github.com/turbolent/prettier v0.0.0-20220320183459-661cc755135d h1:5JInRQbk5UBX8JfUvKh2oYTLMVwj3p6n+wapDDm7hko= github.com/turbolent/prettier v0.0.0-20220320183459-661cc755135d/go.mod h1:Nlx5Y115XQvNcIdIy7dZXaNSUpzwBSge4/Ivk93/Yog= -github.com/vektra/mockery v1.1.2 h1:uc0Yn67rJpjt8U/mAZimdCKn9AeA97BOkjpmtBSlfP4= -github.com/vektra/mockery v1.1.2/go.mod h1:VcfZjKaFOPO+MpN4ZvwPjs4c48lkq1o3Ym8yHZJu0jU= github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM= github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg= github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74= @@ -334,7 +325,6 @@ golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc= -golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs= 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 v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4= @@ -482,7 +472,6 @@ golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapK golang.org/x/tools v0.0.0-20200227222343-706bc42d1f0d/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28= golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw= golang.org/x/tools v0.0.0-20200312045724-11d5b4c81c7d/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw= -golang.org/x/tools v0.0.0-20200323144430-8dcfad9e016e/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8= golang.org/x/tools v0.0.0-20200331025713-a30bf2db82d4/go.mod h1:Sl4aGygMT6LrqrWclx+PTx3U+LnKx/seiNR+3G19Ar8= golang.org/x/tools v0.0.0-20200501065659-ab2804fb9c9d/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= golang.org/x/tools v0.0.0-20200512131952-2bc93b1c0c88/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE= @@ -499,7 +488,6 @@ golang.org/x/tools v0.0.0-20210105154028-b0ab187a4818/go.mod h1:emZCQorbCU4vsT4f golang.org/x/tools v0.0.0-20210108195828-e2f9c7f1fc8e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA= golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0= golang.org/x/tools v0.13.0 h1:Iey4qkscZuv0VvIt8E0neZjtPVQFSc870HQ448QgEmQ= -golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58= 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=