| object | The transaction to send, when eligible.Fields: to, data, value, chainId |
expiry | integer | Unix seconds after which the voucher is void. |
txCount* | integer | The wallet's counted Base transactions. |
eligible* | boolean | Whether the wallet may claim. |
required | integer | The gate, when not eligible. Always 167. |
signature | string | Server-signed voucher, when eligible. |