Failed getting local MSP principal during channelless check

Error message

Failed getting local MSP principal during channelless check policy with policy [%s]: [%s]

What it means

p.principalGetter.Get(policyName) failed while loading the MSPPrincipal needed to evaluate the channelless (local) policy. The principal getter resolves a policy name into an MSPPrincipal for the peer's local MSP; failure means the requested principal does not exist in the local MSP configuration, so the policy cannot be evaluated.

Source

Thrown at core/policy/policy.go:141

		return fmt.Errorf("Failing extracting header during channelless check policy with policy [%s]: [%s]", policyName, err)
	}

	shdr, err := protoutil.UnmarshalSignatureHeader(header.SignatureHeader)
	if err != nil {
		return fmt.Errorf("Invalid Proposal's SignatureHeader during channelless check policy with policy [%s]: [%s]", policyName, err)
	}

	// Deserialize proposal's creator with the local MSP
	id, err := p.localMSP.DeserializeIdentity(shdr.Creator)
	if err != nil {
		logger.Warnw("Failed deserializing proposal creator during channelless check policy", "error", err, "policyName", policyName, "identity", protoutil.LogMessageForSerializedIdentity(shdr.Creator))
		return fmt.Errorf("Failed deserializing proposal creator during channelless check policy with policy [%s]: [%s]", policyName, err)
	}

	// Load MSPPrincipal for policy
	principal, err := p.principalGetter.Get(policyName)
	if err != nil {
		return fmt.Errorf("Failed getting local MSP principal during channelless check policy with policy [%s]: [%s]", policyName, err)
	}

	// Verify that proposal's creator satisfies the principal
	err = id.SatisfiesPrincipal(principal)
	if err != nil {
		logger.Warnw("Failed verifying that proposal's creator satisfies local MSP principal during channelless check policy", "error", err, "policyName", policyName, "requiredPrincipal", principal, "signingIdentity", protoutil.LogMessageForSerializedIdentity(shdr.Creator))
		return fmt.Errorf("Failed verifying that proposal's creator satisfies local MSP principal during channelless check policy with policy [%s]: [%s]", policyName, err)
	}

	// Verify the signature
	return id.Verify(signedProp.ProposalBytes, signedProp.Signature)
}

// CheckPolicyBySignedData checks that the passed signed data is valid with the respect to
// passed policy on the passed channel.
func (p *policyChecker) CheckPolicyBySignedData(channelID, policyName string, sd []*protoutil.SignedData) error {
	if channelID == "" {
		return errors.New("Invalid channel ID name during check policy on signed data. Name must be different from nil.")

View on GitHub (pinned to 2736b63f8f)

Solutions

Use an exact, supported principal name ('Admins', 'Members', 'Client', 'Peer', 'Orderer') matching the local MSP's config.
Inspect the peer's local MSP directory (msp/config.yaml) and ensure the OU/role you request is declared.
Update the client code to the principal names supported by the running Fabric version.
If a custom principal is needed, configure the local MSP accordingly or use a channel policy instead of the channelless check.

Example fix

// before: unsupported name
err := policyMgr.CheckPolicyNoChannel("ADMIN", signedProp)

// after: exact MSP principal role
err := policyMgr.CheckPolicyNoChannel("Admins", signedProp)

Defensive patterns

Strategy: validation

Validate before calling

var supportedPrincipals = map[string]bool{"Admins": true, "Members": true, "Client": true, "Peer": true, "Orderer": true}
if !supportedPrincipals[policyName] {
    return fmt.Errorf("policy %q is not a known local MSP principal", policyName)
}

Type guard

func isKnownMSPPrincipal(name string) bool {
    switch name {
    case "Admins", "Members", "Client", "Peer", "Orderer":
        return true
    }
    return false
}

Try / catch

err := policyMgr.CheckPolicy(policyName, signedProp)
if err != nil && strings.Contains(err.Error(), "Failed getting local MSP principal") {
    // fall back to a known principal name or surface a config error to the operator
}

Prevention

Use exact principal role names from the Fabric MSP spec
Verify the peer's local MSP config.yaml declares the OU/roles your code requests
Check Fabric release notes for principal/NodeRole naming changes before upgrading
Centralize policy name constants instead of hardcoding strings at call sites

When it happens

Trigger: Calling CheckPolicy with a policyName the local MSP principal getter doesn't recognize (e.g. 'Admins'/'Members'/'Client'/'Peer' misspelled or unsupported by the configured local MSP, or requesting an OU/role the local MSP config doesn't define).

Common situations: Mistyped policy names in code or configuration using the local/channelless policy path; Fabric version differences in supported principal classes (e.g. NodeRole names); local MSP config.yaml missing the OU/role declaration the code requests.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/b1265415dce6f500. Report an issue: GitHub.