Chain reads

readPolicyObject(client, policyId): Promise<PolicyObject>

type PolicyObject = {
  caps: { coinType: string; perTxCap: string; perDayCap: string; spentToday: string }[];
  actions: number[];
  allowedPackages: string[];
  expiresAtMs: string;
  revoked: boolean;
  paused: boolean;
};

vaultBalances(client, vaultId): Promise<{ coinType: string; amount: string }[]>

readAuditLog(client, corePkg, limit = 50): Promise<AuditEvent[]>

type AuditEvent = { type: string; txDigest: string; timestampMs: string | null; data: unknown };

decodePolicyAbort(err): { code: number; reason_code: string; message: string } | null

try {
  await agent.swap(2_000_000_000n);
} catch (e) {
  const ab = decodePolicyAbort(e);
  if (ab) console.log(ab.reason_code, ab.message); // "over_per_tx_cap", "over per-tx cap"
  else throw e;                                    // not a policy decision
}