sei-agent-kit/dist/src/tools/sei-erc20/balance.js

A package for building AI agents on the SEI blockchain

import { formatEther } from "viem";
import { getBalance, formatWei, getTokenDecimals } from "../../utils";
/**
 * Get ERC-20 token balance for a wallet
 * @param agent SeiAgentKit instance
 * @param contract_address Optional ERC-20 token contract address
 * @returns Promise with formatted balance as string
 */
export async function get_erc20_balance(agent, contract_address) {
    console.log(`Querying balance of ${contract_address ? contract_address : 'SEI'} for ${agent.wallet_address}...`);
    try {
        if (!contract_address) {
            // Handle native token balance
            if (!agent.publicClient) {
                throw new Error("Public client not initialized");
            }
            if (!agent.wallet_address) {
                throw new Error("Wallet address not specified");
            }
            const balance = await agent.publicClient.getBalance({
                address: agent.wallet_address
            });
            return formatEther(balance);
        }
        // Handle ERC-20 token balance
        if (!agent.publicClient || !agent.wallet_address) {
            throw new Error("Public client or wallet address not initialized");
        }
        const balance = await getBalance(agent, contract_address);
        if (balance === null || balance === undefined) {
            throw new Error(`Failed to retrieve balance for contract: ${contract_address}`);
        }
        const decimals = await getTokenDecimals(agent, contract_address);
        if (decimals === null || decimals === undefined) {
            throw new Error(`Failed to retrieve token decimals for contract: ${contract_address}`);
        }
        const formatBalance = formatWei(Number(balance), decimals);
        return formatBalance.toString() || '0';
    }
    catch (error) {
        const errorMsg = error instanceof Error ? error?.message : String(error);
        console.error(errorMsg);
        throw error;
    }
}
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