{"record":{"id":"71cff47dfb4d8109","repo":"hyperledger/fabric","slug":"channel-header-cannot-be-nil","errorCode":null,"errorMessage":"channel header cannot be nil","messagePattern":"channel header cannot be nil","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"core/common/ccpackage/ccpackage.go","lineNumber":28,"sourceCode":"\t\"bytes\"\n\t\"errors\"\n\t\"fmt\"\n\n\t\"github.com/hyperledger/fabric-protos-go-apiv2/common\"\n\t\"github.com/hyperledger/fabric-protos-go-apiv2/peer\"\n\t\"github.com/hyperledger/fabric/internal/pkg/identity\"\n\t\"github.com/hyperledger/fabric/protoutil\"\n\t\"google.golang.org/protobuf/proto\"\n)\n\n// ExtractSignedCCDepSpec extracts the messages from the envelope\nfunc ExtractSignedCCDepSpec(env *common.Envelope) (*common.ChannelHeader, *peer.SignedChaincodeDeploymentSpec, error) {\n\tp := &common.Payload{}\n\tif err := proto.Unmarshal(env.Payload, p); err != nil {\n\t\treturn nil, nil, err\n\t}\n\tif p.Header == nil {\n\t\treturn nil, nil, errors.New(\"channel header cannot be nil\")\n\t}\n\tch := &common.ChannelHeader{}\n\tif err := proto.Unmarshal(p.Header.ChannelHeader, ch); err != nil {\n\t\treturn nil, nil, err\n\t}\n\n\tsp := &peer.SignedChaincodeDeploymentSpec{}\n\tif err := proto.Unmarshal(p.Data, sp); err != nil {\n\t\treturn nil, nil, err\n\t}\n\n\treturn ch, sp, nil\n}\n\n// This file provides functions for helping with the chaincode install\n// package workflow. In particular\n//     OwnerCreateSignedCCDepSpec - each owner creates signs the package using the same deploy\n//     CreateSignedCCDepSpecForInstall - an admin or owner creates the package to be installed","sourceCodeStart":10,"sourceCodeEnd":46,"githubUrl":"https://github.com/hyperledger/fabric/blob/2736b63f8fd5932511d56fe68b7039d15977f7f6/core/common/ccpackage/ccpackage.go#L10-L46","documentation":"ExtractSignedCCDepSpec unmarshalled the envelope payload but the payload's Header (specifically its ChannelHeader) was nil, meaning the chaincode package envelope is malformed — it lacks the channel header required to identify the package.","triggerScenarios":"Thrown at core/common/ccpackage/ccpackage.go:28 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Regenerate or re-sign the chaincode install package so the envelope contains a proper channel header","Verify the envelope was produced by OwnerCreateSignedCCDepSpec/createSignedCCDepSpec and not corrupted in transit","Reject the package file and obtain a valid copy from the owner"],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"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"}