getClientVersion.ts•2.08 kB
import { z } from "zod";
import { CallToolResult } from "@modelcontextprotocol/sdk/types";
import { INFURA_CHAIN_URLS } from "../../config/chains.js";
interface JsonRpcResponse<T = unknown> {
jsonrpc: string;
id: number;
result?: T;
error?: { code?: number; message: string };
}
export const getClientVersion = {
name: "eth_get_web3_client_version",
description: "Returns the current client version string.",
schema: {
chainid: z
.number()
.optional()
.describe("EVM chain ID (default: 1 for Ethereum mainnet)"),
},
handler: async ({
chainid,
}: {
chainid?: number;
}): Promise<CallToolResult> => {
try {
const selectedChainId = chainid ?? 1;
const url = INFURA_CHAIN_URLS[selectedChainId];
if (!url) {
return {
content: [
{ type: "text", text: `Unsupported chain ID: ${selectedChainId}` },
],
};
}
const body = {
jsonrpc: "2.0",
method: "web3_clientVersion",
params: [],
id: 1,
};
const res = await fetch(url, {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(body),
});
const data: JsonRpcResponse<string> = await res.json();
if (data.result === undefined) {
return {
content: [
{
type: "text",
text: `Error fetching client version: ${
data.error?.message || "Unknown error"
}`,
},
],
};
}
return {
content: [
{
type: "text",
text: `Client version: ${data.result}`,
},
],
};
} catch (err: unknown) {
const message =
err instanceof Error
? err.message
: typeof err === "string"
? err
: JSON.stringify(err);
return {
content: [
{ type: "text", text: `Error fetching client version: ${message}` },
],
};
}
},
};