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Simple 7702 Account (EntryPoint v0.9)

The Simple7702AccountV09 is a minimalist smart contract account for EIP-7702, targeting EntryPoint v0.9 (0x433709009B8330FDa32311DF1C2AFA402eD8D009). It shares the same audited contract implementation and API surface as Simple7702Account, with type specialization for UserOperationV9.

EntryPoint v0.9 maintains ABI compatibility with v0.8 while adding:

  • Parallelizable Paymaster Signing: New paymasterSignature field allows passing data to Paymasters after UserOperation signing.
  • Block Number-Based Validity Ranges: validAfter and validUntil can now specify block numbers instead of timestamps.
  • Flexible InitCode Handling: initCode is silently ignored if the Account already exists, enabling two-dimensional nonce usage.
  • UserOp Hash Query: New getCurrentUserOpHash function exposes the current UserOperation hash during execution.

The following ERCs are supported:

  • ERC-165
  • ERC-721
  • ERC-1155
  • ERC-1271
  • ERC-4337 v0.9
Full Example

A complete working example is available on GitHub: 01-upgrade-eoa.ts

Smart Contracts and Audits​

The contracts were developed by the Ethereum Foundation Account Abstraction Team and audited by Cantina.

How to Use​

Prerequisites​

Before using Simple7702AccountV09, you must have:

  • Node.js: Version 18.0 or higher.
  • EIP-7702 Compatible Network: Ethereum mainnet, Sepolia, or other EIP-7702 enabled chains with EP v0.9 support.
  • Private Key Access: Required for signing authorizations and user operations.

Installation​

npm install abstractionkit

Usage​

import { Simple7702AccountV09 } from "abstractionkit";

const delegatorPublicAddress = "0xBdbc5FBC9cA8C3F514D073eC3de840Ac84FC6D31"; // EOA public key
const smartAccount = new Simple7702AccountV09(delegatorPublicAddress);

Constructor defaults:

  • entrypointAddress: 0x433709009B8330FDa32311DF1C2AFA402eD8D009 (EntryPoint v0.9)
  • delegateeAddress: 0xa46cc63eBF4Bd77888AA327837d20b23A63a56B5

Both can be overridden by passing an overrides object as the second constructor argument.

Essential Methods​

createUserOperation​

Creates a UserOperation for EIP-7702 accounts that can be sent to bundlers for execution.

example.ts
import { Simple7702AccountV09 } from "abstractionkit";

const delegatorPublicAddress = "0xBdbc5FBC9cA8C3F514D073eC3de840Ac84FC6D31";
const smartAccount = new Simple7702AccountV09(delegatorPublicAddress);

const chainId = 11155111n; // Sepolia

const transactions = [
  {
    to: "0x...",
    value: 0n,
    data: "0x...",
  },
];

const userOperation = await smartAccount.createUserOperation(
  transactions,
  "https://ethereum-sepolia-rpc.publicnode.com", // provider RPC
  "https://your-ep-v09-bundler-rpc", // bundler RPC (must support EP v0.9)
  {
    eip7702Auth: {
      chainId, // chainId at which the account will be authorized
    },
    // Optional overrides
    maxFeePerGas: 20000000000n,
    maxPriorityFeePerGas: 2000000000n,
  }
);

signUserOperation​

Signs a UserOperation with the provided private key for the EIP-7702 account.

example.ts
const signature = smartAccount.signUserOperation(
  userOperation,
  "0x...private-key",
  11155111n // chain ID
);

userOperation.signature = signature;

signUserOperationWithSigner​

Signs a UserOperation using an ExternalSigner instead of a raw private key. Integrates viem, ethers, browser wallets, hardware wallets, HSMs, and MPC services through the same API.

Since AbstractionKit v0.3.5, Simple7702AccountV09 accepts signers that implement either signTypedData or signHash. The SDK prefers signTypedData when available, so JSON-RPC wallets and viem WalletClient instances can sign EntryPoint v0.9 UserOperations without raw-hash signing support. Raw-hash signers continue to work.

example.ts
import { fromViemWalletClient } from "abstractionkit";
import { createWalletClient, custom } from "viem";
import { sepolia } from "viem/chains";

const chain = sepolia;

const walletClient = createWalletClient({
  account: delegatorPublicAddress,
  chain,
  transport: custom(window.ethereum),
});

userOperation.signature = await smartAccount.signUserOperationWithSigner(
  userOperation,
  fromViemWalletClient(walletClient),
  11155111n, // chain ID
);

See External Signers for the full list of adapters and custom-signer integrations. EntryPoint v0.9 also supports parallel paymaster signing via the two-phase signingPhase context — see the parallel signing example.

getUserOperationEip712Data​

Builds the EIP-712 typed data payload for a UserOperation under the EntryPoint v0.9 domain. Use this static helper when you need to inspect the wallet prompt payload or drive a custom signTypedData primitive directly.

Full example: 06-typed-data-builder.ts.

example.ts
import { Simple7702AccountV09 } from "abstractionkit";

const typedData = Simple7702AccountV09.getUserOperationEip712Data(
  userOperation,
  11155111n,
);

const signature = await walletClient.signTypedData(typedData);
userOperation.signature = signature;

getUserOperationEip712TypedData was renamed in v0.3.8 and moved from an instance method to a static helper. Use getUserOperationEip712Hash(userOperation, chainId, overrides?) when you only need the digest.

sendUserOperation​

Sends a signed UserOperation to the bundler for execution on-chain.

example.ts
const response = await smartAccount.sendUserOperation(
  userOperation,
  "https://your-ep-v09-bundler-rpc" // bundler URL (must support EP v0.9)
);

console.log("UserOperation hash:", response.userOperationHash);

// Wait for the transaction to be included
const receipt = await response.included();
console.log("Transaction receipt:", receipt);

prependTokenPaymasterApproveToCallDataStatic​

Prepends a token approval transaction to existing call data for use with token paymasters.

example.ts
const callDataWithApproval = Simple7702AccountV09.prependTokenPaymasterApproveToCallDataStatic(
  "0x...", // existing call data
  "0xa0b86a33e6b3e96bb24b8e4b28e80e0fb3a4f4b6", // USDC token address
  "0x...", // paymaster address
  1000000n // approve amount (1 USDC)
);

prependTokenPaymasterApproveToCallData​

Instance method to prepend token approval to call data for paymaster usage.

example.ts
const callDataWithApproval = smartAccount.prependTokenPaymasterApproveToCallData(
  "0x...", // existing call data
  "0xa0b86a33e6b3e96bb24b8e4b28e80e0fb3a4f4b6", // USDC token address
  "0x...", // paymaster address
  1000000n // approve amount
);

Advanced Methods​

createAccountCallData​

Creates call data for a basic transaction with specified target, value, and data.

example.ts
const callData = Simple7702AccountV09.createAccountCallData(
  "0x...", // to address
  1000000000000000000n, // value in wei
  "0x..." // transaction data
);

createAccountCallDataSingleTransaction​

Creates call data for a single SimpleMetaTransaction.

example.ts
const metaTransaction = {
  to: "0x...",
  value: 0n,
  data: "0x...",
};

const callData = Simple7702AccountV09.createAccountCallDataSingleTransaction(metaTransaction);

createAccountCallDataBatchTransactions​

Creates call data for batching multiple SimpleMetaTransactions together.

example.ts
const transactions = [
  { to: "0x...", value: 0n, data: "0x..." },
  { to: "0x...", value: 0n, data: "0x..." },
];

const callData = Simple7702AccountV09.createAccountCallDataBatchTransactions(transactions);

estimateUserOperationGas​

Estimates gas limits for a UserOperation using the bundler.

example.ts
const [preVerificationGas, verificationGasLimit, callGasLimit] =
  await smartAccount.estimateUserOperationGas(
    userOperation,
    "https://your-ep-v09-bundler-rpc",
    {
      // Optional overrides
      stateOverrideSet: {...},
      dummySignature: "0x...",
    }
  );

Delegation Methods​

isDelegatedToThisAccount​

Checks if the EOA is currently delegated to the expected smart account address via EIP-7702. Returns true only when delegated to the account's delegateeAddress.

example.ts
const isDelegated = await smartAccount.isDelegatedToThisAccount(
  "https://ethereum-sepolia-rpc.publicnode.com"
);

if (isDelegated) {
  console.log("EOA is delegated to this smart account");
} else {
  console.log("EOA is not delegated");
}

createRevokeDelegationTransaction​

Creates a signed EIP-7702 transaction that revokes the delegation, restoring the EOA to a regular account. The transaction delegates to address(0), removing the smart account code from the EOA.

This is a regular Ethereum transaction (type 0x04), not a UserOperation. The EOA needs native tokens to pay for gas.

note

Revocation cannot be done via a UserOperation because the authorization list is processed before execution, which would remove the account's code mid-transaction.

example.ts
const signedTransaction = await smartAccount.createRevokeDelegationTransaction(
  "0x...private-key",
  "https://ethereum-sepolia-rpc.publicnode.com",
);

// Send using your preferred method (e.g., viem, ethers)
// const txHash = await client.request({
//   method: 'eth_sendRawTransaction',
//   params: [signedTransaction],
// });

Error Handling & Common Issues​

For runnable examples that classify and recover from the most common UserOperation failures (underfunded paymaster, insufficient token balance, sponsor denial, on-chain reverts, and gas-too-low retries), see the error-handling examples.

// Missing eip7702Auth on the first UserOperation authorization
const userOperation = await smartAccount.createUserOperation(
  transactions,
  providerRpc,
  bundlerRpc,
  {
    eip7702Auth: { chainId: 11155111n }, // Required for EIP-7702
  }
);
Last updated on by sednaoui