getTransactionByHash.ts•2.46 kB
import { z } from "zod";
import { CallToolResult } from "@modelcontextprotocol/sdk/types";
import { INFURA_CHAIN_URLS } from "../../config/chains.js";
import { JsonRpcResponse } from "../../types/rpc.js";
export const getTransactionByHash = {
name: "eth_get_transaction_by_hash",
description:
"Returns information about a transaction for a given hash. Defaults to Ethereum mainnet if no chain is specified.",
schema: {
hash: z.string().describe("32-byte transaction hash"),
chainid: z
.number()
.optional()
.describe("EVM chain ID (default: 1 for Ethereum mainnet)"),
},
handler: async ({
hash,
chainid,
}: {
hash: string;
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: "eth_getTransactionByHash",
params: [hash],
id: 1,
};
const res = await fetch(url, {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify(body),
});
const data: JsonRpcResponse = await res.json();
if (!("result" in data)) {
return {
content: [
{
type: "text",
text: `Error fetching transaction: ${data.error?.message || "Unknown error"}`,
},
],
};
}
if (data.result === null) {
return {
content: [
{
type: "text",
text: `No transaction found for hash ${hash} on chainid ${selectedChainId}`,
},
],
};
}
return {
content: [
{
type: "text",
text: `Transaction for hash ${hash} on chainid ${selectedChainId}`,
},
{ type: "text", text: JSON.stringify(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 transaction: ${message}` },
],
};
}
},
};