EIP-1193 Provider

The NeroProvider class implements the EIP1193Provider interface, creating a standards-compliant Ethereum provider that delegates RPC methods to the SDK's internal MPC operations. This adapter enables seamless integration with any dApp or library that accepts a standard Ethereum provider.

Connection Lifecycle

The SDK manages provider connectivity through a state machine tracking four distinct states:

The status getter exposes current connection state, with a connected boolean shorthand for convenience.

Provider Configuration

The NeroProvider receives request({ method, params }) calls and routes them to internal SDK callbacks:

Key RPC Handlers

Account Management

eth_accounts and eth_requestAccounts return the active wallet address. DKLS mode returns _dklsWalletAddress, while Pedersen returns the EOA address from the SmartWallet instance.

Message Signing

• personal_sign -- Converts hex or UTF-8 messages to bytes before calling the SDK's signMessageInternal
• eth_signTypedData_v4 -- Parses JSON typed data and forwards to signTypedDataInternal

Transaction Execution

eth_sendTransaction triggers protocol-specific workflows. Pedersen builds ERC-4337 UserOperations, while DKLS generates signatures for raw transactions.

Provider Events

sdk.provider.on("connect", (info) => {
  console.log("Connected to chain:", info.chainId);
});

sdk.provider.on("disconnect", (error) => {
  console.log("Disconnected:", error);
});

sdk.provider.on("accountsChanged", (accounts) => {
  console.log("Accounts:", accounts);
});

sdk.provider.on("chainChanged", (chainId) => {
  console.log("Chain changed:", chainId);
});

Provider Error Codes

SDK Integration Methods

Three helper methods manage the provider lifecycle:

The provider becomes fully operational after the connection state transitions to "connected", enabling dApps to submit RPC requests through any compatible library.

Usage with ethers.js

import { BrowserProvider } from "ethers";

const ethersProvider = new BrowserProvider(sdk.provider);
const signer = await ethersProvider.getSigner();
const balance = await ethersProvider.getBalance(signer.address);

Usage with viem

import { createWalletClient, createPublicClient, custom } from "viem";
import { neroTestnet } from "@nerochain/mpc-sdk/chains";

const walletClient = createWalletClient({
  chain: neroTestnet,
  transport: custom(sdk.provider),
});

const publicClient = createPublicClient({
  chain: neroTestnet,
  transport: custom(sdk.provider),
});