@iqai/mcp-bamm/dist/lib/token-utils.js

MCP server for bamm (borrow automated market maker)

import { erc20Abi } from "viem";
export async function ensureTokenApproval(tokenAddress, spenderAddress, amount, publicClient, walletClient) {
    if (!walletClient.account) {
        throw new Error("Wallet account is not set");
    }
    const userAddress = walletClient.account.address;
    const currentAllowance = await publicClient.readContract({
        address: tokenAddress,
        abi: erc20Abi,
        functionName: "allowance",
        args: [userAddress, spenderAddress],
    });
    if (currentAllowance < amount) {
        const { request: approveRequest } = await publicClient.simulateContract({
            address: tokenAddress,
            abi: erc20Abi,
            functionName: "approve",
            args: [spenderAddress, amount],
            account: walletClient.account,
        });
        await walletClient.writeContract(approveRequest);
    }
}
export async function checkTokenBalance(tokenAddress, userAddress, amount, publicClient) {
    const balance = await publicClient.readContract({
        address: tokenAddress,
        abi: erc20Abi,
        functionName: "balanceOf",
        args: [userAddress],
    });
    if (balance < amount) {
        throw new Error("Insufficient token balance");
    }
    return balance;
}
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