@agentek/tools
Version:
Blockchain tools for AI agents
102 lines • 3.85 kB
JavaScript
import { z } from "zod";
import { createTool } from "../client.js";
import { clean, addressSchema } from "../utils.js";
import { supportedChains } from "./constants.js";
import { erc721Abi } from "viem";
export const getNFTMetadataTool = createTool({
name: "getNFTMetadata",
description: "Gets metadata for an NFT token by contract address and token ID",
supportedChains,
parameters: z.object({
contractAddress: addressSchema.describe("The NFT contract address"),
tokenId: z.string().describe("The token ID of the NFT"),
chainId: z.number().describe("The chain ID where the NFT exists"),
}),
execute: async (client, args) => {
const { contractAddress, tokenId, chainId } = args;
const publicClient = client.getPublicClient(chainId);
try {
// Get basic NFT information
const [name, symbol, tokenURI] = await Promise.all([
publicClient.readContract({
address: contractAddress,
abi: erc721Abi,
functionName: "name",
}),
publicClient.readContract({
address: contractAddress,
abi: erc721Abi,
functionName: "symbol",
}),
publicClient.readContract({
address: contractAddress,
abi: erc721Abi,
functionName: "tokenURI",
args: [BigInt(tokenId)],
}),
]);
// Get owner of NFT
let owner = "";
try {
owner = await publicClient.readContract({
address: contractAddress,
abi: erc721Abi,
functionName: "ownerOf",
args: [BigInt(tokenId)],
});
}
catch (error) {
return {
chain: chainId,
error: `Failed to fetch NFT owner: ${typeof error === "object" && error
? "shortMessage" in error
? error.shortMessage
: "message" in error
? error.message
: "Unknown error"
: String(error)}`,
};
}
// Fetch metadata from tokenURI if it exists
let metadata = null;
if (tokenURI) {
try {
// Handle both HTTP and IPFS URIs
const url = tokenURI.startsWith('ipfs://')
? `https://ipfs.io/ipfs/${tokenURI.slice(7)}`
: tokenURI;
const response = await fetch(url);
if (response.ok) {
metadata = await response.json();
}
}
catch (error) {
// Silently handle error but continue with other data
}
}
return clean({
chain: chainId,
contractAddress,
tokenId,
name,
symbol,
owner,
tokenURI,
metadata,
});
}
catch (error) {
return {
chain: chainId,
error: `Failed to fetch NFT metadata: ${typeof error === "object" && error
? "shortMessage" in error
? error.shortMessage
: "message" in error
? error.message
: "Unknown error"
: String(error)}`,
};
}
},
});
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