@sei-js/mcp-server/dist/esm/core/services/clients.js

Model Context Protocol (MCP) server for interacting with EVM-compatible networks

import { http, createPublicClient, createWalletClient } from 'viem';
import { privateKeyToAccount } from 'viem/accounts';
import { DEFAULT_NETWORK, getChain, getRpcUrl } from '../chains.js';
// Cache for clients to avoid recreating them for each request
const clientCache = new Map();
/**
 * Get a public client for a specific network
 */
export function getPublicClient(network = DEFAULT_NETWORK) {
    const cacheKey = String(network);
    // Return cached client if available
    if (clientCache.has(cacheKey)) {
        const cachedClient = clientCache.get(cacheKey);
        // This should never happen as we just checked with has(), but better to be safe
        if (!cachedClient) {
            throw new Error(`Client cache inconsistency for network ${network}`);
        }
        return cachedClient;
    }
    // Create a new client
    const chain = getChain(network);
    const rpcUrl = getRpcUrl(network);
    const client = createPublicClient({
        chain,
        transport: http(rpcUrl)
    });
    // Cache the client
    clientCache.set(cacheKey, client);
    return client;
}
/**
 * Create a wallet client for a specific network and private key
 */
export function getWalletClient(privateKey, network = DEFAULT_NETWORK) {
    const chain = getChain(network);
    const rpcUrl = getRpcUrl(network);
    const account = privateKeyToAccount(privateKey);
    return createWalletClient({
        account,
        chain,
        transport: http(rpcUrl)
    });
}
/**
 * Get an EVM address from a private key
 * @param privateKey The private key in hex format (with or without 0x prefix)
 * @returns The EVM address derived from the private key
 */
export function getAddressFromPrivateKey(privateKey) {
    const account = privateKeyToAccount(privateKey);
    return account.address;
}