@type t() :: %AgentWorld.TxRequest{
  chain_id: non_neg_integer(),
  data: String.t(),
  description: String.t(),
  expected_signer: String.t(),
  expires_at: String.t() | nil,
  idempotency_key: String.t(),
  risk_copy: String.t(),
  to: String.t(),
  value: String.t()
}