hyperledger/fabric · error

failed to serialize signer

Error message

failed to serialize signer

What it means

Install() could not obtain the local signer's serialized identity via i.Signer.Serialize(), which is needed to embed the creator in the install proposal. This reflects an msp/identity configuration problem in the peer CLI process.

Source

Thrown at internal/peer/lifecycle/chaincode/install.go:135

		i.Input.PackageFile = args[0]
	}
}

// Install installs a chaincode for use with _lifecycle.
func (i *Installer) Install() error {
	err := i.Input.Validate()
	if err != nil {
		return err
	}

	pkgBytes, err := i.Reader.ReadFile(i.Input.PackageFile)
	if err != nil {
		return errors.WithMessagef(err, "failed to read chaincode package at '%s'", i.Input.PackageFile)
	}

	serializedSigner, err := i.Signer.Serialize()
	if err != nil {
		return errors.Wrap(err, "failed to serialize signer")
	}

	proposal, err := i.createInstallProposal(pkgBytes, serializedSigner)
	if err != nil {
		return err
	}

	signedProposal, err := signProposal(proposal, i.Signer)
	if err != nil {
		return errors.WithMessage(err, "failed to create signed proposal for chaincode install")
	}

	return i.submitInstallProposal(signedProposal)
}

func (i *Installer) submitInstallProposal(signedProposal *pb.SignedProposal) error {
	proposalResponse, err := i.EndorserClient.ProcessProposal(context.Background(), signedProposal)
	if err != nil {

View on GitHub (pinned to 2736b63f8f)

Solutions

1. Verify CORE_PEER_MSPCONFIGPATH points to a valid MSP directory containing signcerts/ and keystore/ (or sk) files.
2. Confirm CORE_PEER_LOCALMSPID matches the MSP folder name.
3. Re-copy or regenerate the MSP material from the crypto config.
4. Export the admin signer correctly (e.g. use the org admin MSP path).

Example fix

// before
export CORE_PEER_MSPCONFIGPATH=/tmp/empty-msp
// after
export CORE_PEER_LOCALMSPID=Org1MSP
export CORE_PEER_MSPCONFIGPATH=${PWD}/crypto/peerOrganizations/org1/users/Admin@org1/msp

mspDir := os.Getenv("CORE_PEER_MSPCONFIGPATH")
for _, p := range []string{"signcerts", "keystore"} {
    if _, err := os.Stat(filepath.Join(mspDir, p)); err != nil {
        return fmt.Errorf("MSP dir %s missing %s", mspDir, p)
    }
}
if os.Getenv("CORE_PEER_LOCALMSPID") == "" {
    return errors.New("CORE_PEER_LOCALMSPID not set")
}

if err := install(); err != nil {
    if strings.Contains(err.Error(), "failed to serialize signer") {
        // re-export CORE_PEER_MSPCONFIGPATH to a valid admin MSP and retry
    }
    return err
}

When it happens

Trigger: i.Signer.Serialize() errors during `peer lifecycle chaincode install` because the local MSP identity could not be loaded or serialized (missing cert/key files, malformed MSP directory).

Common situations: CORE_PEER_LOCALMSPID / CORE_PEER_MSPCONFIGPATH wrong or pointing to an incomplete MSP dir (missing signcerts/keystore); admin cert not present in the MSP; env set after switching users/orgs.

Related errors

• collection-name: %s -- contains an identity that is not part
• Failed verifying that proposal's creator satisfies local MSP
• failed deserializing identity
• Cannot create signed proposal, due to %s
• invalid identity type, expected *identity

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/1dfc1d9bf494ac59. Report an issue: GitHub.