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fix: attestation idempotency #51

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Merged
alanshaw merged 1 commit into from
Aug 3, 2026
+7 −0
Merged

fix: attestation idempotency #51

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7 changes: 7 additions & 0 deletions attestation/signer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import (
"github.com/fil-forge/libforge/commands/ucan/attest"
"github.com/fil-forge/ucantone/did"
"github.com/fil-forge/ucantone/ucan"
"github.com/fil-forge/ucantone/ucan/invocation"
"github.com/fil-forge/ucantone/varsig"
"github.com/ipfs/go-cid"
mh "github.com/multiformats/go-multihash"
Expand Down Expand Up @@ -42,10 +43,16 @@ func (s Issuer) Sign(data []byte) []byte {
panic(fmt.Sprintf("failed to compute message digest: %v", err))
}

// The attestation is an assertion of fact: it is inherently idempotent
// (no nonce) and cannot expire (the attested delegation's own exp bounds
// the authorization). See the attested authority spec, signature
// invocation fields.
inv, err := attest.Proof.Invoke(
s.authority,
s.authority.DID(),
&attest.ProofArguments{Proof: cid.NewCidV1(cid.Raw, msgDigest)},
invocation.WithNoNonce(),
invocation.WithNoExpiration(),
)
if err != nil {
panic(fmt.Sprintf("failed to create invocation: %v", err))
Expand Down
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