66 lines
2.7 KiB
TypeScript
66 lines
2.7 KiB
TypeScript
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import { ethers } from "ethers";
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import { formatUnits, parseUnits } from "ethers/lib/utils";
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import { Bridge__factory, TokenImplementation__factory } from "../ethers-contracts";
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import { ChainId, CHAIN_ID_ETH, ETH_TOKEN_BRIDGE_ADDRESS } from "./consts";
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// TODO: this should probably be extended from the context somehow so that the signatures match
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// TODO: allow for / handle cancellation?
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// TODO: overall better input checking and error handling
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function transferFromEth(provider: ethers.providers.Web3Provider | undefined, tokenAddress: string, amount: string, recipientChain: ChainId, recipientAddress: Uint8Array | undefined) {
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if (!provider || !recipientAddress) return;
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const signer = provider.getSigner();
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if (!signer) return;
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//TODO: check if token attestation exists on the target chain
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//TODO: don't hardcode, fetch decimals / share them with balance, how do we determine recipient chain?
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//TODO: more catches
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const amountParsed = parseUnits(amount, 18);
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signer.getAddress().then((signerAddress) => {
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console.log("Signer:", signerAddress);
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console.log("Token:", tokenAddress)
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const token = TokenImplementation__factory.connect(
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tokenAddress,
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signer
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);
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token
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.allowance(signerAddress, ETH_TOKEN_BRIDGE_ADDRESS)
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.then((allowance) => {
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console.log("Allowance", allowance.toString()); //TODO: should we check that this is zero and warn if it isn't?
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token
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.approve(ETH_TOKEN_BRIDGE_ADDRESS, amountParsed)
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.then((transaction) => {
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console.log(transaction);
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const fee = 0; // for now, this won't do anything, we may add later
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const nonceConst = Math.random() * 100000;
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const nonceBuffer = Buffer.alloc(4);
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nonceBuffer.writeUInt32LE(nonceConst, 0);
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console.log("Initiating transfer");
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console.log("Amount:", formatUnits(amountParsed, 18));
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console.log("To chain:", recipientChain);
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console.log("To address:", recipientAddress);
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console.log("Fees:", fee);
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console.log("Nonce:", nonceBuffer);
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const bridge = Bridge__factory.connect(
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ETH_TOKEN_BRIDGE_ADDRESS,
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signer
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);
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bridge
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.transferTokens(
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tokenAddress,
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amountParsed,
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recipientChain,
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recipientAddress,
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fee,
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nonceBuffer
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)
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.then((v) => console.log("Success:", v))
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.catch((r) => console.error(r)); //TODO: integrate toast messages
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});
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});
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});
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}
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const transferFrom = {
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[CHAIN_ID_ETH]: transferFromEth
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}
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export default transferFrom
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