{"record":{"id":"c9d4b0e148994c24","repo":"hyperledger/fabric","slug":"failed-to-s","errorCode":null,"errorMessage":"Failed to %s","messagePattern":"Failed to (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"core/scc/cscc/configure.go","lineNumber":219,"sourceCode":"\t\t}\n\t\treturn e.getChannelConfig(args[1])\n\tcase GetChannels:\n\t\t// 2. check get channels policy\n\t\tif err = e.aclProvider.CheckACL(resources.Cscc_GetChannels, \"\", sp); err != nil {\n\t\t\treturn shim.Error(fmt.Sprintf(\"access denied for [%s]: %s\", fname, err))\n\t\t}\n\n\t\treturn e.getChannels()\n\n\t}\n\treturn shim.Error(fmt.Sprintf(\"Requested function %s not found.\", fname))\n}\n\n// validateConfigBlock validate configuration block to see whenever it's contains valid config transaction\nfunc validateConfigBlock(block *common.Block, bccsp bccsp.BCCSP) error {\n\tenvelopeConfig, err := protoutil.ExtractEnvelope(block, 0)\n\tif err != nil {\n\t\treturn errors.Errorf(\"Failed to %s\", err)\n\t}\n\n\tconfigEnv := &common.ConfigEnvelope{}\n\t_, err = protoutil.UnmarshalEnvelopeOfType(envelopeConfig, common.HeaderType_CONFIG, configEnv)\n\tif err != nil {\n\t\treturn errors.Errorf(\"Bad configuration envelope: %s\", err)\n\t}\n\n\tif configEnv.Config == nil {\n\t\treturn errors.New(\"Nil config envelope Config\")\n\t}\n\n\tif configEnv.Config.ChannelGroup == nil {\n\t\treturn errors.New(\"Nil channel group\")\n\t}\n\n\tif configEnv.Config.ChannelGroup.Groups == nil {\n\t\treturn errors.New(\"No channel configuration groups are available\")","sourceCodeStart":201,"sourceCodeEnd":237,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/core/scc/cscc/configure.go#L201-L237","documentation":"In cscc (the CSCC system chaincode) validateConfigBlock validates that a block submitted for join/config contains a valid config transaction. When protoutil.ExtractEnvelope(block, 0) fails to extract the envelope at index 0 of the block, the error is wrapped (poorly) as 'Failed to %s' with the underlying error interpolated. The message wording is a known cosmetic bug — the real cause is in the wrapped error text.","triggerScenarios":"Calling cscc Invoke with JOIN (InvokeNoShim -> JoinChain -> validateConfigBlock) on a genesis/config block whose Data has no transactions at index 0, or the block is malformed/not a proper config block; passing a block file that is corrupt, truncated, or not actually a genesis block (e.g. an application block or wrong-channel genesis block).","commonSituations":"peer channel join with a corrupted or wrong genesis.block file; joining with a block produced by a different channel; using an old genesis block incompatible with the current Fabric version (capabilities mismatch); manually constructing blocks in tests with an empty payload.","solutions":["Regenerate the genesis block (configtxgen -outputBlock genesis.block) for the correct channel/profile and re-run peer channel join","Verify the block file is a genuine config/genesis block for the intended channel (configtxlator or protoutil inspection)","Check the full wrapped error after 'Failed to ' — it names the actual extraction failure (e.g. missing envelope index, unmarshal error)","Ensure Fabric binary and genesis block were produced by compatible versions/capabilities"],"exampleFix":"// before (fabric source, misleading wrap)\nreturn errors.Errorf(\"Failed to %s\", err)\n// after\nreturn errors.Wrap(err, \"failed extracting config envelope from block\")","handlingStrategy":"validation","validationCode":"func validateGenesisBlockFile(path string) error {\n    data, err := os.ReadFile(path)\n    if err != nil { return err }\n    block := &common.Block{}\n    if err := proto.Unmarshal(data, block); err != nil { return fmt.Errorf(\"not a valid block: %w\", err) }\n    if block.Data == nil || len(block.Data.Data) == 0 { return errors.New(\"block contains no envelopes\") }\n    env, err := protoutil.ExtractEnvelope(block, 0)\n    if err != nil { return fmt.Errorf(\"envelope 0 extraction failed: %w\", err) }\n    _ = env\n    return nil\n}","typeGuard":"func isWellFormedBlock(b *common.Block) bool {\n    return b != nil && b.Data != nil && len(b.Data.Data) > 0 && b.Header != nil\n}","tryCatchPattern":"if err := validateConfigBlock(block, bccsp); err != nil {\n    // message reads 'Failed to <cause>'; parse the cause after the prefix\n    cause := strings.TrimPrefix(err.Error(), \"Failed to \")\n    return fmt.Errorf(\"config block validation failed: %s\", cause)\n}","preventionTips":["Always join with a freshly generated genesis block for the exact channel profile","Verify block integrity (checksum) after configtxgen and before peer channel join","Ensure genesis block and peer binaries come from compatible Fabric versions/capability levels","Inspect the block with configtxlator before joining if in doubt"],"tags":["hyperledger-fabric","cscc","config","genesis-block"],"backgroundTag":"invalid-config-block","analyzedSha":"2736b63f8fd5932511d56fe68b7039d15977f7f6","analyzedAt":"2026-09-04T08:52:36.465Z","contentChangedAt":"2026-09-04T08:52:36.465Z","schemaVersion":2},"datasetVersion":"2026-09-08T10:18:20.063Z"}