> For the complete documentation index, see [llms.txt](https://vinu.gitbook.io/vinuchain/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vinu.gitbook.io/vinuchain/technical-docs/smart-contracts/account-abstraction.md).

# Account Abstraction (ERC-4337)

VinuChain supports [ERC-4337](https://eips.ethereum.org/EIPS/eip-4337) account abstraction, letting users transact through smart-contract accounts (paying gas via paymasters, batching calls, using custom signature schemes) without any change to the underlying protocol. The standard ERC-4337 stack lives at its canonical, cross-chain addresses, so existing tooling (account SDKs, bundler clients, paymaster services) works against VinuChain unmodified.

The ELEMONT upgrade enables ERC-4337 on mainnet: Prague's **EIP-7702 set-code transactions** are live, and the canonical [Arachnid deterministic-deployment proxy](https://github.com/Arachnid/deterministic-deployment-proxy) transaction is allowlisted so the EntryPoint can be placed at its canonical address on mainnet (chain `207`).

## Availability

| Network | Chain ID | ERC-4337 |
| ------- | -------- | -------- |
| Mainnet | 207      | **Live** |
| Testnet | 206      | **Live** |

## Canonical contracts (both networks)

| Contract             | Address                                      |
| -------------------- | -------------------------------------------- |
| EntryPoint v0.7      | `0x0000000071727De22E5E9d8BAf0edAc6f37da032` |
| SimpleAccountFactory | `0x27e13cC69A1d0cb6205153f89Be711B1872CfFd6` |

The EntryPoint lives at the same canonical address used on Ethereum and other EVM chains. It is deployed deterministically through the Arachnid deterministic-deployment proxy at `0x4e59b44847b379578588920cA78FbF26c0B4956C`, so the address is identical everywhere the proxy exists.

## Bundlers

A public ERC-4337 bundler (Skandha) is available on testnet:

```
https://bundler-testnet.vinuexplorer.org/rpc
```

It exposes the standard bundler RPC methods. Confirm the supported EntryPoint before submitting:

```bash
curl -s -X POST https://bundler-testnet.vinuexplorer.org/rpc \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_supportedEntryPoints","params":[]}'
# -> ["0x0000000071727De22E5E9d8BAf0edAc6f37da032"]
```

A bundler is simply an ERC-4337-aware relayer pointed at a node's RPC. To submit UserOperations on **mainnet**, run a bundler (e.g. Skandha) against the mainnet RPC `https://vinuchain-rpc.com`, or use any hosted bundler that supports VinuChain mainnet. The EntryPoint address and UserOperation flow are identical on both networks.

## Submitting a UserOperation

The flow is the standard ERC-4337 flow — nothing VinuChain-specific:

1. Compute your smart-account address from the `SimpleAccountFactory` (or your chosen factory) and fund it, or attach a paymaster.
2. Build and sign a `UserOperation` for EntryPoint v0.7.
3. Send it to a bundler with `eth_sendUserOperation`, passing the EntryPoint address as the second parameter.
4. Poll `eth_getUserOperationReceipt` for inclusion.

```bash
curl -s -X POST <bundler-endpoint> \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"eth_sendUserOperation",
       "params":[<userOp>, "0x0000000071727De22E5E9d8BAf0edAc6f37da032"]}'
```

SDKs such as [permissionless.js](https://docs.pimlico.io/permissionless), [userop.js](https://github.com/stackup-wallet/userop.js), and the [aa-sdk](https://accountkit.alchemy.com/) can be pointed at the VinuChain RPC (`https://vinuchain-rpc.com` for mainnet, `https://vinufoundation-rpc.com` for testnet) and a bundler endpoint.

## Exploring UserOperations

Indexed UserOperations are available through the VinuExplorer account-abstraction API, for example (testnet):

```
https://testnet.vinuexplorer.org/api/v2/proxy/account-abstraction/operations
```

The mainnet explorer at [vinuexplorer.org](https://vinuexplorer.org) surfaces the same account-abstraction views.

## How it works at the protocol level

ERC-4337 needs two things from the chain, both delivered by ELEMONT:

* **EIP-7702 set-code transactions** (Prague) let EOAs delegate to contract code.
* **Placing the EntryPoint at its canonical CREATE2 address.** The Arachnid deterministic-deployer transaction is pre-EIP-155 (chain-id-less). A node only admits such transactions over RPC when started with the `--rpc.allow-unprotected-txs` flag, which is **refused on mainnet (NetworkID 207)** by a node-level guard. To still allow the canonical deployment, mainnet admits **only the single canonical Arachnid deployer transaction** (pinned by exact transaction hash) so the EntryPoint can be placed at its canonical address without otherwise relaxing replay protection.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://vinu.gitbook.io/vinuchain/technical-docs/smart-contracts/account-abstraction.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.