xrpl mcp

import { Client, Wallet } from "xrpl"; import { z } from "zod"; import { server } from "../../server/server.js"; import { getXrplClient } from "../../core/services/clients.js"; import { MAINNET_URL, TESTNET_URL } from "../../core/constants.js"; import { connectedWallet, isConnectedToTestnet } from "../../core/state.js"; // Register approve-token-spending tool (TrustSet) server.tool( "approve-token-spending", "Establish trust line to approve token usage", { fromSeed: z .string() .optional() .describe("Seed of the wallet, if not using connected wallet"), currency: z.string().describe("Currency code"), issuer: z.string().describe("Issuer address for the token"), limit: z.string().describe("Maximum amount approved for use"), useTestnet: z .boolean() .optional() .describe("Whether to use testnet or mainnet"), }, async ({ fromSeed, currency, issuer, limit, useTestnet }) => { let client: Client | null = null; try { const useTestnetNetwork = useTestnet !== undefined ? useTestnet : isConnectedToTestnet; client = await getXrplClient(useTestnetNetwork); // Use provided seed or connected wallet let wallet: Wallet; if (fromSeed) { wallet = Wallet.fromSeed(fromSeed); } else if (connectedWallet) { wallet = connectedWallet; } else { throw new Error( "No wallet connected. Please connect first or provide a fromSeed." ); } // Create trust line transaction const trustSet = { TransactionType: "TrustSet", Account: wallet.address, LimitAmount: { currency, issuer, value: limit, }, }; const prepared = await client.autofill(trustSet as any); const signed = wallet.sign(prepared); const result = await client.submitAndWait(signed.tx_blob); let status = "unknown"; if (typeof result.result.meta !== "string" && result.result.meta) { status = result.result.meta.TransactionResult === "tesSUCCESS" ? "success" : "failed"; } return { content: [ { type: "text", text: JSON.stringify( { status, hash: result.result.hash, account: wallet.address, currency, issuer, limit, _meta: { network: useTestnetNetwork ? TESTNET_URL : MAINNET_URL, networkType: useTestnetNetwork ? "testnet" : "mainnet", }, }, null, 2 ), }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error setting trust line: ${ error instanceof Error ? error.message : String(error) }`, }, ], }; } finally { if (client) { await client.disconnect(); } } } );