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Bankless Onchain MCP Server

Official
by Bankless
tokens.ts2.88 kB
import { z } from 'zod'; import axios from 'axios'; import { BanklessAuthenticationError, BanklessRateLimitError, BanklessResourceNotFoundError, BanklessValidationError } from '../common/banklessErrors.js'; const BASE_URL = 'https://api.bankless.com/mcp'; // Schema for token balances on network request export const TokenBalancesOnNetworkSchema = z.object({ network: z.string().describe('The blockchain network (e.g., "ethereum", "base")'), address: z.string().describe('The address to check token balances for') }); /** * Fetches all token balances for a given address on a specific network. * * @param network - The blockchain network (e.g., "base", "ethereum") * @param address - The address to check token balances for * @returns An object containing token balances and total dollar value */ export async function getTokenBalancesOnNetwork( network: string, address: string ): Promise<{ balances: Array<{ amount: number; network: string; token: { network: string; logo: string; name: string; symbol: string; address: string; decimals: number; totalSupply: number; underlyingTokens: Array<any>; verified: boolean; type: string; }; price: number; decimalAmount: number; dollarValue: number; }>; totalDollarValue: number; }> { const token = process.env.BANKLESS_API_TOKEN; if (!token) { throw new BanklessAuthenticationError('BANKLESS_API_TOKEN environment variable is not set'); } const endpoint = `${BASE_URL}/token/balance/${address}/${network}`; try { const response = await axios.get( endpoint, { headers: { 'Content-Type': 'application/json', 'X-BANKLESS-TOKEN': `${token}` } } ); return response.data; } catch (error) { if (axios.isAxiosError(error)) { const statusCode = error.response?.status || 'unknown'; const errorMessage = error.response?.data?.message || error.message; if (statusCode === 401 || statusCode === 403) { throw new BanklessAuthenticationError(`Authentication Failed: ${errorMessage}`); } else if (statusCode === 404) { throw new BanklessResourceNotFoundError(`Address or network not found: ${address} on ${network}`); } else if (statusCode === 422) { throw new BanklessValidationError(`Validation Error: ${errorMessage}`, error.response?.data); } else if (statusCode === 429) { const resetAt = new Date(); resetAt.setSeconds(resetAt.getSeconds() + 60); throw new BanklessRateLimitError(`Rate Limit Exceeded: ${errorMessage}`, resetAt); } throw new Error(`Bankless API Error (${statusCode}): ${errorMessage}`); } throw new Error(`Failed to get token balances: ${error instanceof Error ? error.message : String(error)}`); } }

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