@getalby/mcp/build/tools/nwc/pay_invoice.js

MCP server for controlling a Lightning wallet using Nostr Wallet Connect

import { z } from "zod";
export function registerPayInvoiceTool(server, client) {
    server.registerTool("pay_invoice", {
        title: "Pay Invoice",
        description: "Pay a lightning invoice",
        inputSchema: {
            invoice: z.string().describe("The lightning invoice to pay"),
            amount: z
                .number()
                .describe("Optional amount in millisats, only provide if paying a zero-amount invoice")
                .nullish(),
            metadata: z
                .object({})
                .passthrough()
                .describe("Optional metadata to include with the payment")
                .nullish(),
        },
        outputSchema: {
            preimage: z.string().describe("Payment preimage"),
            fees_paid: z.number().describe("Fees paid in millisats"),
        },
    }, async (params) => {
        const result = await client.payInvoice({
            invoice: params.invoice,
            amount: params.amount || undefined,
            metadata: params.metadata || undefined,
        });
        return {
            content: [
                {
                    type: "text",
                    text: JSON.stringify(result, null, 2),
                },
            ],
            structuredContent: result,
        };
    });
}