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

This error is returned when MSPPrincipalGetter.Get(policyName) fails to build an MSPPrincipal from the given name on the local MSP. The getter resolves the policy name to an MSP role principal (e.g. an MSP ID with Admins/Member/Peer role); failure means the name is not a recognizable principal string or the named MSP is not configured locally. It is thrown before any signature or role check happens, once per signed data entry in the loop.

Source

Thrown at core/policy/policy.go:211

		return errors.New("invalid policy name during channelless check policy. Name must be different from nil.")
	}

	if len(signedData) == 0 {
		return fmt.Errorf("no signed data during channelless check policy with policy [%s]", policyName)
	}

	for _, data := range signedData {
		// Deserialize identity with the local MSP
		id, err := p.localMSP.DeserializeIdentity(data.Identity)
		if err != nil {
			logger.Warnw("Failed deserializing signed data identity during channelless check policy", "error", err, "policyName", policyName, "identity", protoutil.LogMessageForSerializedIdentity(data.Identity))
			return fmt.Errorf("failed deserializing signed data identity 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 the signed data identity satisfies local MSP principal during channelless check policy", "error", err, "policyName", policyName, "requiredPrincipal", principal, "identity", protoutil.LogMessageForSerializedIdentity(data.Identity))
			return fmt.Errorf("failed verifying that the signed data identity satisfies local MSP principal during channelless check policy with policy [%s]: [%s]", policyName, err)
		}

		// Verify the signature
		if err = id.Verify(data.Data, data.Signature); err != nil {
			return err
		}
	}

	return nil
}

View on GitHub (pinned to 2736b63f8f)

Solutions

Pass an MSP principal name the local MSP can resolve — typically the MSP ID, not a channel policy path like 'Writers'.
Check the peer's local MSP configuration includes an MSP matching the given name.
Review MSPPrincipalGetter.Get's accepted formats (MSP ID, or ROLE/OU-based principal strings) and match your input.
If you meant to check a channel policy (e.g. 'Writers'), call CheckPolicyBySignedData with the channelID instead of the channelless variant.

Example fix

// before: channel policy name used in channelless check
err := policyChecker.CheckPolicyNoChannelBySignedData("Writers", sd) // not an MSP principal
// after: use the MSP ID / principal resolvable by the local MSP
err := policyChecker.CheckPolicyNoChannelBySignedData("Org1MSP", sd)

Defensive patterns

Strategy: validation

Validate before calling

// Resolve the principal yourself first to fail with a clearer error
principal, err := principalGetter.Get(policyName)
if err != nil {
    return fmt.Errorf("policy name %q is not a valid local MSP principal: %w", policyName, err)
}
err = policyChecker.CheckPolicyNoChannelBySignedData(policyName, signedData)

Type guard

func resolvablePrincipal(g policy.MSPPrincipalGetter, name string) bool {
    _, err := g.Get(name)
    return err == nil
}

Try / catch

if err := policyChecker.CheckPolicyNoChannelBySignedData(policyName, signedData); err != nil {
    if strings.Contains(err.Error(), "failed getting local MSP principal") {
        return fmt.Errorf("%q is not a resolvable local MSP principal; use an MSP ID known to this peer", policyName)
    }
    return err
}

Prevention

Pass MSP IDs (e.g. 'Org1MSP') to channelless checks, not channel policy names like 'Writers'.
Verify the MSP named in policyName exists in the peer's local MSP configuration.
Centralize valid principal names as constants instead of free-form config strings.
Use CheckPolicyBySignedData with a channelID when the intent is a channel policy evaluation.

When it happens

Trigger: Calling CheckPolicyNoChannelBySignedData with a policyName that is not a valid MSP identifier/principal representation (e.g. a channel policy name like 'Writers' that has no meaning in the channelless path, a typo'd MSP ID, or an MSP not present in the peer's local MSP config).

Common situations: Reusing a channel policy name (e.g. 'Application/Writers') with the channelless API which expects an MSP principal name; passing an OU or role string in the wrong format; referencing an org MSP that exists on the channel but is missing from the peer's local MSP directory; typo in config producing an unknown MSP ID.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/05c5b305debf24be. Report an issue: GitHub.