near-ca/dist/esm/setup.js

An SDK for controlling Ethereum Accounts from a Near Account.

import { KeyPair } from "near-api-js";
import { MpcContract } from "./mpcContract";
import { configFromNetworkId, createNearAccount, getNetworkId, NearEthAdapter, } from "./chains";
import { isKeyPairString } from "./types";
/**
 * Sets up the NEAR-Ethereum adapter using the provided configuration
 *
 * This function establishes a connection to the NEAR network using the given
 * account details, configures the Multi-Party Computation (MPC) contract, and
 * returns an instance of the NearEthAdapter.
 *
 * @param args - The configuration parameters for setting up the adapter
 * @returns An instance of NearEthAdapter configured with the provided settings
 * @throws Error if the `accountId` does not match the networkId of the provided or inferred `network`
 * @throws Error if there is a failure in creating a NEAR account
 */
export async function setupAdapter(args) {
    const { accountId, privateKey, mpcContractId, derivationPath = "ethereum,1", } = args;
    // Load near config from provided accountId if not provided
    const accountNetwork = getNetworkId(accountId);
    const config = args.network ?? configFromNetworkId(accountNetwork);
    if (accountNetwork !== config.networkId) {
        throw new Error(`accountId ${accountId} doesn't match the networkId ${config.networkId}. Please ensure that your accountId is correct and corresponds to the intended network.`);
    }
    let account;
    try {
        account = await createNearAccount(accountId, config, 
        // Without private key, MPC contract connection is read-only.
        privateKey && isKeyPairString(privateKey)
            ? KeyPair.fromString(privateKey)
            : undefined);
    }
    catch (error) {
        console.error(`Failed to create NEAR account: ${error}`);
        throw error;
    }
    return NearEthAdapter.fromConfig({
        mpcContract: new MpcContract(account, mpcContractId, args.rootPublicKey),
        derivationPath: derivationPath,
    });
}