{"record":{"id":"afc09e73ed439319","repo":"hyperledger/fabric","slug":"nil-config-envelope-config","errorCode":null,"errorMessage":"Nil config envelope Config","messagePattern":"Nil config envelope Config","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"core/scc/cscc/configure.go","lineNumber":229,"sourceCode":"\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\")\n\t}\n\n\t_, exists := configEnv.Config.ChannelGroup.Groups[channelconfig.ApplicationGroupKey]\n\tif !exists {\n\t\treturn errors.Errorf(\"Invalid configuration block, missing %s \"+\n\t\t\t\"configuration group\", channelconfig.ApplicationGroupKey)\n\t}\n\n\t// Check the capabilities requirement\n\tif err = channelconfig.ValidateCapabilities(block, bccsp); err != nil {","sourceCodeStart":211,"sourceCodeEnd":247,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/core/scc/cscc/configure.go#L211-L247","documentation":"validateConfigBlock successfully unmarshaled the envelope into a common.ConfigEnvelope, but the inner Config field is nil. The envelope was the right type, yet its payload contained an empty/unpopulated ConfigEnvelope (no channel configuration at all). cscc refuses to proceed because there is no configuration to apply to the channel.","triggerScenarios":"Submitting a ConfigEnvelope created with only ChannelId/Sequence set but Config left nil; constructing the envelope manually and forgetting to assign the *common.Config obtained from configtxlator/proto_decode; an unmarshaled default ConfigEnvelope{} passed to JoinChain.","commonSituations":"Hand-rolled channel creation scripts that allocate the envelope struct without populating it; configtxlator round-trips where only the wrapper was re-encoded; partially written tools that extract the envelope but drop the payload.","solutions":["Populate ConfigEnvelope.Config with the *common.Config produced by configtxgen/configtxlator (or from an Update message applied to the previous config)","If starting a new channel, generate a proper genesis block via `configtxgen -profile <profile> -channelID <id> -outputBlock genesis.block` and extract its config envelope","Validate the decoded envelope client-side before submission: `if env.Config == nil { fail }`","Re-encode with `configtxlator proto_encode --type common.ConfigEnvelope` to ensure the Config field is serialized"],"exampleFix":"// before\nconfigEnv := &common.ConfigEnvelope{ChannelId: chID}\n// after\ncfg := readConfigFromConfigtxlatorOrGenesisBlock()\nconfigEnv := &common.ConfigEnvelope{ChannelId: chID, Config: cfg}","handlingStrategy":"validation","validationCode":"if configEnv.Config == nil {\n    return errors.New(\"refusing to submit: ConfigEnvelope.Config is nil; regenerate with configtxgen\")\n}","typeGuard":"func hasConfig(env *common.ConfigEnvelope) bool { return env != nil && env.Config != nil }","tryCatchPattern":"if configEnv.Config == nil {\n    return fmt.Errorf(\"nil Config in ConfigEnvelope: regenerate genesis/config tx with configtxgen\")\n}","preventionTips":["Populate both ChannelId and Config fields when constructing a ConfigEnvelope","Round-trip check: proto_decode the encoded envelope and assert Config != nil","Prefer configtxgen/configtxlator output over hand-built structs","Unit-test the envelope construction before invoking cscc"],"tags":["fabric","system-chaincode","config-envelope","nil-field"],"backgroundTag":"malformed-config-envelope","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"}