delegatedSendSponsoredTransaction

delegatedSendSponsoredTransaction signs an EIP-712 AuthorizedExecutions intent for a batch of calls, relays it to Dynamic’s sponsorship backend, and polls until the transaction lands on-chain. Use it when you hold a user’s delegated key share and want the transaction to be gas-sponsored.

EVM Gas Sponsorship is an enterprise-only feature and works with V3 MPC embedded wallets only.

Function signature

delegatedSendSponsoredTransaction(
  client: DelegatedEvmWalletClient,
  params: {
    walletId: string;
    walletApiKey: string;
    keyShare: ServerKeyShare;
    walletAddress: Hex;
    userId: string;
    shareSetId?: string;
    chainId: number;
    rpcUrl?: string;
    calls: SponsoredTransactionCall[];
    authorization?: SerializedAuthorization;
    autoDelegate?: boolean;
    nonce?: bigint;
    validForSeconds?: number;
    traceContext?: TraceContext;
  }
): Promise<{ transactionHash: Hex }>

Parameters

Required

Parameter	Type	Description
`client`	`DelegatedEvmWalletClient`	The delegated client from `createDelegatedEvmWalletClient()`.
`walletId`	`string`	The wallet ID from the delegation webhook.
`walletApiKey`	`string`	The wallet-specific API key from the delegation webhook.
`keyShare`	`ServerKeyShare`	The delegated server key share from the delegation webhook.
`walletAddress`	`Hex`	The wallet’s EOA address (`publicKey` from the webhook).
`userId`	`string`	UUID of the end user who owns the wallet. Required for relay attribution.
`chainId`	`number`	Target chain ID.
`calls`	`SponsoredTransactionCall[]`	The batch of calls to execute.

Optional

Parameter	Type	Description
`shareSetId`	`string`	The `shareSetId` from the `wallet.delegation.created` webhook payload. Omit and the server resolves the correct share set by wallet ID.
`rpcUrl`	`string`	RPC URL used to read the wallet’s delegation state and EOA nonce. Required on first use unless you pass a pre-signed `authorization`.
`authorization`	`SerializedAuthorization`	Pre-signed EIP-7702 authorization. Takes priority over `autoDelegate`.
`autoDelegate`	`boolean`	Whether to auto-sign an EIP-7702 authorization when the wallet is not delegated. Defaults to `true`.
`nonce`	`bigint`	Bitmap nonce for the signed intent. A random unused one is generated when omitted.
`validForSeconds`	`number`	How long the signed intent stays valid. Defaults to `600` (10 minutes).
`traceContext`	`TraceContext`	Distributed tracing context.

Each entry in calls is a SponsoredTransactionCall:

Field	Type	Description
`target`	`Hex`	The address you are sending to or the contract to call.
`data`	`Hex`	Calldata to execute on the target. Use `0x` for a plain native-token transfer.
`value`	`bigint`	Amount of native token (in wei) to send with the call.

Returns

Promise<{ transactionHash: Hex }> — the on-chain transaction hash once the relay reports success.

Example

import {
  createDelegatedEvmWalletClient,
  delegatedSendSponsoredTransaction
} from '@dynamic-labs-wallet/node-evm';
import { parseEther } from 'viem';

const client = createDelegatedEvmWalletClient({
  environmentId: process.env.DYNAMIC_ENVIRONMENT_ID,
  apiKey: process.env.DYNAMIC_SERVER_API_KEY,
});

const endUser = { id: 'user-uuid' };
const recipientAddress = '0xRecipientAddress';
// Replace with the decrypted delegation payload from your webhook handler
const credentials = {
  walletId: 'wallet-id',
  walletApiKey: 'wallet-api-key',
  keyShare: 'encrypted-key-share',
  publicKey: '0xWalletAddress',
};

const { transactionHash } = await delegatedSendSponsoredTransaction(client, {
  walletId: credentials.walletId,
  walletApiKey: credentials.walletApiKey,
  keyShare: credentials.keyShare,
  walletAddress: credentials.publicKey,
  userId: endUser.id,
  chainId: 8453,
  rpcUrl: process.env.BASE_RPC_URL,
  calls: [{
    target: recipientAddress,
    data: '0x',
    value: parseEther('0.01'),
  }],
});

console.log('Sponsored transaction confirmed:', transactionHash);

Splitting sign and send

To sign in one process and relay from another, call delegatedSignSponsoredTransaction first and pass the returned SignedSponsoredTransaction to sendSponsoredTransaction on a DynamicEvmWalletClient with userId.

Error handling

If sponsorship cannot go through, delegatedSendSponsoredTransaction throws. Wrap the call in a try/catch so you can surface a message and decide what to do next.

try {
  const { transactionHash } = await delegatedSendSponsoredTransaction(client, params);
} catch (error) {
  console.error('Sponsorship failed:', error.message);
}

delegatedSignSponsoredTransaction — sign a sponsored intent without relaying
delegatedSign7702Authorization — manage the one-time EIP-7702 delegation step
EVM Gas Sponsorship — full guide

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delegatedSendSponsoredTransaction

Function signature

Parameters

Required

Optional

Returns

Example

Splitting sign and send

Error handling

​Function signature

​Parameters

​Required

​Optional

​Returns

​Example

​Splitting sign and send

​Error handling

​Related

Function signature

Parameters

Required

Optional

Returns

Example

Splitting sign and send

Error handling

Related