@stable-io/cctp-sdk-cctpr-evm/dist/transfer.js

EVM support for the CCTPR corridor of the CCTP SDK

// Copyright (c) 2025 Stable Technologies Inc
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
import { gasTokenKindOf, init as initDefinitions, Usdc, } from "@stable-io/cctp-sdk-definitions";
import { init as initCctpr } from "@stable-io/cctp-sdk-cctpr-definitions";
import { EvmAddress, init as initEvm } from "@stable-io/cctp-sdk-evm";
import { Amount } from "@stable-io/amount";
import { CctpR, quoteIsInUsdc } from "./contractSdk/index.js";
export const transfer = (network) => {
    const cctpr = initCctpr(network);
    const { usdcContracts } = initDefinitions(network);
    const { getTokenBalance, getTokenAllowance, composeApproveTx, composePermitMsg, } = initEvm(network);
    return async function* (client, sender, destinationDomain, recipient, IoAmountUsdc, //TODO: this should use InOrOut too
    quote, gasDropoff, corridor, takeFeesFromInput, //TODO: this should use InOrOut too
    usePermit = true) {
        const sourceDomain = client.domain;
        const gasDropoffLimit = Amount.ofKind(gasTokenKindOf(destinationDomain))(cctpr.gasDropoffLimitOf[destinationDomain]);
        if (gasDropoff.gt(gasDropoffLimit))
            throw new Error("Gas Drop Off Limit Exceeded");
        const usdcAddr = new EvmAddress(usdcContracts.contractAddressOf[sourceDomain]);
        const cctprAddress = new EvmAddress(cctpr.contractAddressOf(sourceDomain));
        const cctprSdk = new CctpR(client);
        const [gasTokenBalance, usdcBalance, usdcAllowance] = await Promise.all([
            client.getBalance(sender),
            getTokenBalance(client, usdcAddr, sender, Usdc),
            getTokenAllowance(client, usdcAddr, sender, cctprAddress, Usdc),
        ]);
        const requiredAllowance = cctprSdk.checkCostAndCalcRequiredAllowance({ amount: IoAmountUsdc, type: takeFeesFromInput ? "in" : "out" }, quote, corridor);
        if (usdcBalance.lt(requiredAllowance))
            throw new Error("Insufficient USDC balance");
        if (!quoteIsInUsdc(quote) && gasTokenBalance.lt(quote.maxRelayFee))
            throw new Error("Insufficient gas token balance");
        let permit;
        if (usdcAllowance.lt(requiredAllowance)) {
            permit = yield (usePermit
                ? composePermitMsg(client, usdcAddr, sender, cctprAddress, requiredAllowance)
                : composeApproveTx(usdcAddr, sender, cctprAddress, requiredAllowance));
        }
        const recipientUniversal = recipient.toUniversalAddress();
        return cctprSdk.transferWithRelay(destinationDomain, { amount: IoAmountUsdc, type: takeFeesFromInput ? "in" : "out" }, recipientUniversal, gasDropoff, corridor, quote, permit);
    };
};
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