EVM Gas Sponsorship

EVM Gas Sponsorship on testnets is available on every plan. Sponsoring mainnet transactions requires an Enterprise plan. Contact us to learn more about upgrading your plan.

Normally, a user needs to hold some of a network’s native token (like ETH) to pay the “gas” fee on every transaction. Gas sponsorship lets your app pay those fees instead, so users can transact without ever topping up a wallet.

EVM Gas Sponsorship works only with V3 MPC embedded wallets (the wallets Dynamic creates for your users). It does not work with external wallets like MetaMask.

Quick start

Turn on gas sponsorship in the developer console

Go to the Dynamic Developer Console
Navigate to Settings > Embedded Wallets
Make sure the EVM chains you want to sponsor are enabled
Toggle on EVM Gas Sponsorship, then choose which of the supported networks to sponsor

Send a sponsored transaction

Call sendSponsoredTransaction on the SDK’s evm module with a list of EvmSponsoredCall entries and the user’s wallet. It returns the relayed transaction hash.

import com.dynamic.sdk.android.DynamicSDK
import com.dynamic.sdk.android.Models.BaseWallet
import com.dynamic.sdk.android.Models.EvmSponsoredCall

val sdk = DynamicSDK.getInstance()

suspend fun sendSponsoredTx(
    wallet: BaseWallet,
    recipientAddress: String
): String {
    return sdk.evm.sendSponsoredTransaction(
        calls = listOf(
            EvmSponsoredCall(
                target = recipientAddress,
                data = "0x",                  // "0x" = a plain native-token transfer
                value = "10000000000000000"   // 0.01 ETH in wei
            )
        ),
        wallet = wallet
    )
}

The user pays no gas, and the first sponsored transaction handles the one-time EIP-7702 delegation setup automatically.

What goes in `calls`

Each EvmSponsoredCall describes one action the transaction performs:

Field	Type	Description
`target`	`String`	The address you are sending to (a recipient or a contract).
`data`	`String`	The ABI-encoded action to run on the target. Use `"0x"` for a plain native-token transfer.
`value`	`String`	Amount of native token to send with the call, in wei as a decimal string. Use `"0"` when the call moves no native token.

Batch calls

A single sponsored transaction can carry more than one call: they are executed together, atomically (all succeed or all revert). The example below approves an ERC-20 spend and deposits into a contract in one sponsored transaction:

import java.math.BigInteger

suspend fun approveAndDeposit(
    wallet: BaseWallet,
    tokenAddress: String,
    spenderAddress: String,
    amount: BigInteger
): String {
    return sdk.evm.sendSponsoredTransaction(
        calls = listOf(
            EvmSponsoredCall(
                target = tokenAddress,
                data = Erc20.encodeApprove(spenderAddress, amount),
                value = "0"
            ),
            EvmSponsoredCall(
                target = spenderAddress,
                data = "0x...", // encoded vault call
                value = "0"
            )
        ),
        wallet = wallet
    )
}

Erc20.encodeApprove builds the calldata for the ERC-20 approve(address,uint256) function. Erc20.encodeAllowance builds the allowance(address,address) calldata, and sdk.evm.erc20Allowance(token, owner, spender, chainId) reads the current allowance on-chain when you want to skip an approval the wallet already granted.

Check sponsorship availability

isGasSponsorshipEnabled reports whether the environment can sponsor for the current wallet. Use it before building a sponsored flow, and keep a wallet-paid path for when it returns false:

if (sdk.evm.isGasSponsorshipEnabled()) {
    sdk.evm.sendSponsoredTransaction(calls = calls, wallet = wallet)
} else {
    // Fall back to a regular sendTransaction
}

Earn integration

When Earn executes an EVM vault action, its sponsored parameter routes the approval and the vault call through gas sponsorship automatically. See Gas sponsorship in the Earn guide.

What’s Next

SVM Gas Sponsorship - Sponsor Solana transaction fees
Earn - Deposit into yield vaults with sponsored execution
Send ETH - Wallet-paid EVM transactions

Learn

Build on the client

Build on the server

Configure

EVM Gas Sponsorship

Quick start

What goes in `calls`

Batch calls

Check sponsorship availability

Earn integration

What’s Next

​Quick start

​What goes in calls

​Batch calls

​Check sponsorship availability

​Earn integration

​What’s Next

Quick start

What goes in `calls`

Batch calls

Check sponsorship availability

Earn integration

What’s Next