Erc20

import { Erc20, Amount, TokenRegistry } from "@chipi-stack/core";

const registry = new TokenRegistry("mainnet");
const usdcInfo = registry.bySymbol("USDC")!;
const usdc = new Erc20(usdcInfo, account);

// Query balance (returns Amount)
const balance = await usdc.balanceOf(myAddress);
console.log(balance.toFormatted()); // "150.5 USDC"

new Erc20(token: TokenInfo, account: Account)

const balance = await usdc.balanceOf("0x123...");
console.log(balance.toFormatted()); // "1500.0 USDC"
console.log(balance.toBase());      // 1500000000n

const allowed = await usdc.allowance(ownerAddress, spenderAddress);
if (allowed.lt(transferAmount)) {
  console.log("Need to approve more tokens");
}

const call = usdc.approveCall(spenderAddress, amount);
// Use with TxBuilder
await new TxBuilder(account).add(call).send();

const call = usdc.transferCall(recipientAddress, amount);
await new TxBuilder(account).add(call).send();

import { Erc20, Amount, TxBuilder, TokenRegistry } from "@chipi-stack/core";

const registry = new TokenRegistry("mainnet");
const usdcInfo = registry.bySymbol("USDC")!;
const usdc = new Erc20(usdcInfo, account);

const sendAmount = Amount.parse("25.0", usdcInfo);

// Check balance
const balance = await usdc.balanceOf(myAddress);
if (balance.lt(sendAmount)) {
  throw new Error(`Insufficient: ${balance.toFormatted()} < ${sendAmount.toFormatted()}`);
}

// Check allowance
const allowed = await usdc.allowance(myAddress, dexAddress);

// Build atomic transaction
const builder = new TxBuilder(account);
if (allowed.lt(sendAmount)) {
  builder.add(usdc.approveCall(dexAddress, sendAmount));
}
builder.add(usdc.transferCall(recipientAddress, sendAmount));

// Preview fee, then send
const fee = await builder.estimateFee();
console.log(`Fee: ${fee.overall_fee} wei`);

const result = await new TxBuilder(account)
  .add(usdc.approveCall(dexAddress, sendAmount))
  .add(usdc.transferCall(recipientAddress, sendAmount))
  .send();