sei-agent-kit/dist/src/tools/sei-erc721/balance.js

A package for building AI agents on the SEI blockchain

import { isContract, getBalance } from "../../utils";
/**
 * Gets the ERC-721 token balance for a given wallet address
 *
 * @param agent SeiAgentKit instance
 * @param token_address Address of the ERC-721 token contract
 * @returns Balance as a string
 */
export async function get_erc721_balance(agent, token_address) {
    if (!agent.publicClient || !agent.wallet_address) {
        const errorMsg = "Agent is missing required client or wallet address";
        throw new Error(errorMsg);
    }
    console.log(`Querying NFT balance for ${agent.wallet_address} at ${token_address}...`);
    try {
        // Verify that the token address is a contract
        const isTokenContract = await isContract(agent, token_address);
        if (!isTokenContract) {
            const errorMsg = `Address ${token_address} is not a contract`;
            throw new Error(errorMsg);
        }
        // Get the token balance
        const balance = await getBalance(agent, token_address);
        if (balance === null || balance === undefined) {
            const errorMsg = "Failed to retrieve token balance";
            throw new Error(errorMsg);
        }
        return String(balance);
    }
    catch (error) {
        const errorMsg = error instanceof Error ? error?.message : String(error);
        console.error(errorMsg);
        throw error;
    }
}
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