{"record":{"id":"ab80afe0cd0bb8f5","repo":"hyperledger/fabric","slug":"unmarshalling-envelope-s","errorCode":null,"errorMessage":"unmarshalling envelope: %s","messagePattern":"unmarshalling envelope: (.+?)","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"cmd/osnadmin/main.go","lineNumber":235,"sourceCode":"\tblockChannelID, err := protoutil.GetChannelIDFromBlock(block)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\t// quick sanity check that the orderer admin is joining\n\t// the channel they think they're joining.\n\tif channelID != blockChannelID {\n\t\treturn fmt.Errorf(\"specified --channelID %s does not match channel ID %s in config block\", channelID, blockChannelID)\n\t}\n\n\treturn nil\n}\n\nfunc validateEnvelopeChannelID(envelopeBytes []byte, channelID string) error {\n\tenvelope := &common.Envelope{}\n\terr := proto.Unmarshal(envelopeBytes, envelope)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"unmarshalling envelope: %s\", err)\n\t}\n\n\tenvelopeChannelID, err := protoutil.GetChannelIDFromEnvelope(envelope)\n\tif err != nil {\n\t\treturn err\n\t}\n\n\t// quick sanity check that the orderer admin is joining\n\t// the channel they think they're joining.\n\tif channelID != envelopeChannelID {\n\t\treturn fmt.Errorf(\"specified --channelID %s does not match channel ID %s in config update envelope\", channelID, envelopeChannelID)\n\t}\n\n\treturn nil\n}\n","sourceCodeStart":217,"sourceCodeEnd":251,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/cmd/osnadmin/main.go#L217-L251","documentation":"validateEnvelopeChannelID unmarshals the --configUpdateEnvelope bytes into common.Envelope; a proto.Unmarshal failure is wrapped as this error. It indicates the file is not a valid protobuf-encoded fabric envelope.","triggerScenarios":"Providing a block instead of an envelope, a JSON/YAML configtx artifact, a corrupted or empty file, or a gzipped envelope.","commonSituations":"Mixing up configtxgen outputs (block vs envelope), corruption during container copy, or using an envelope from a different fabric major version.","solutions":["Regenerate the envelope with configtxgen (e.g. -outputUpdateChannelUpdate or -outputAnchorPeersUpdate).","Confirm the file is the envelope, not the block or other artifact.","Re-transfer the file to rule out corruption.","Verify fabric binary versions match between artifact generation and use."],"exampleFix":"// before\nosnadmin channel update --configUpdateEnvelope mychannel.block\n// after\nosnadmin channel update --configUpdateEnvelope config_update_envelope.pb","handlingStrategy":"validation","validationCode":"func looksLikeEnvelope(b []byte) bool {\n    env := &common.Envelope{}\n    return proto.Unmarshal(b, env) == nil && env.Payload != nil\n}\n// run before invoking osnadmin update","typeGuard":"func isProtoEnvelope(b []byte) bool {\n    env := &common.Envelope{}\n    if proto.Unmarshal(b, env) != nil { return false }\n    return env.Payload != nil && env.Signature != nil\n}","tryCatchPattern":"if err := runOsnadmin(); err != nil {\n    if strings.Contains(err.Error(), \"unmarshalling envelope:\") {\n        log.Fatalf(\"--configUpdateEnvelope is not a valid protobuf envelope: %v\", err)\n    }\n}","preventionTips":["Use configtxgen to generate envelopes; never hand-craft bytes.","Keep blocks and envelopes in distinctly named files.","Verify checksums after cross-host transfers.","Regenerate envelopes when upgrading fabric versions."],"tags":["protobuf","validation","hyperledger-fabric"],"backgroundTag":"protobuf-unmarshal-failed","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"}