Allowance Type

// data shape (per token address)
type AllowanceDataEntry = {
  allowance: bigint;
  type: "dzap" | "permit2" | "eip2612";
};

// Example: check if any token needs an on-chain approval
const data = allowanceCheck.data ?? {};
const needsApproval = tokens.some((t) => {
  const entry = data[t.address];
  return entry && entry.type !== "eip2612" && entry.allowance < BigInt(t.amount);
});
// "permit2" and "eip2612" types both additionally require a sign() call before executing
const needsSignature = tokens.some((t) => data[t.address]?.type !== "dzap");