Function signAt

lib/src/commit.ts:143–167

(
  commitBuilder: CommitBuilderI,
  /** Subject URL of the Agent signing the Commit */
  agent: string,
  /** Base64 serialized private key matching the public key of the agent */
  privateKey: string,
  /** Time of signing in millisecons since unix epoch */
  createdAt: number,
)

/** Creates a signature for a Commit using the private Key of some Agent. */
export const signAt = async (
  commitBuilder: CommitBuilderI,
  /** Subject URL of the Agent signing the Commit */
  agent: string,
  /** Base64 serialized private key matching the public key of the agent */
  privateKey: string,
  /** Time of signing in millisecons since unix epoch */
  createdAt: number,
): Promise<Commit> => {
  if (agent == undefined) {
    throw new Error('No agent passed to sign commit');
  }
  const commitPreSigned: CommitPreSigned = {
    ...commitBuilder,
    createdAt,
    signer: agent,
  };
  const serializedCommit = serializeDeterministically(commitPreSigned);
  const signature = await signToBase64(serializedCommit, privateKey);
  const commitPostSigned: Commit = {
    ...commitPreSigned,
    signature,
  };
  return commitPostSigned;
};

// /** Checks whether the commit signature is correct */
// function verifyCommit(commit: Commit, publicKey: string): boolean {