sei-agent-kit/dist/src/utils/approveTokens.js

A package for building AI agents on the SEI blockchain

import { erc20Abi } from "viem";
export async function approveToken(agent, tokenAddress, spender, amount) {
    try {
        // Check current allowance
        const allowance = await agent.publicClient.readContract({
            address: tokenAddress,
            abi: erc20Abi,
            functionName: "allowance",
            args: [agent.wallet_address, spender]
        });
        // If allowance is already sufficient, skip approval
        if (allowance >= amount) {
            return;
        }
        // Prepare approval transaction
        await agent.walletClient.writeContract({
            address: tokenAddress,
            abi: erc20Abi,
            functionName: "approve",
            args: [spender, amount]
        }); // Using 'as any' to bypass type-checking issues
    }
    catch (error) {
        throw new Error(`Failed to approve token: ${error instanceof Error ? error.message : String(error)}`);
    }
}
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