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move getFullSwapERC20 to swap-erc20 to fix circular dep (#1207)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,78 @@ | ||
| import { ethers } from 'ethers' | ||
| import { SwapERC20, FullSwapERC20 } from '@airswap/types' | ||
| import { SwapERC20__factory } from '@airswap/swap-erc20/typechain/factories/contracts' | ||
| import { abi as ERC20_ABI } from '@openzeppelin/contracts/build/contracts/ERC20.json' | ||
|
|
||
| const swapInterface = new ethers.utils.Interface(SwapERC20__factory.abi) | ||
| const erc20Interface = new ethers.utils.Interface(ERC20_ABI) | ||
|
|
||
| const parseTransfer = (log: any) => { | ||
| let parsed | ||
| let transfer | ||
| try { | ||
| parsed = erc20Interface.parseLog(log) | ||
| if (parsed.name === 'Transfer') | ||
| transfer = { | ||
| token: log.address, | ||
| from: parsed.args[0], | ||
| to: parsed.args[1], | ||
| amount: ethers.BigNumber.from(parsed.args[2]), | ||
| } | ||
| } catch (e) { | ||
| return null | ||
| } | ||
| return transfer | ||
| } | ||
|
|
||
| export const getFullSwapERC20 = async ( | ||
| event: SwapERC20, | ||
| tx: ethers.providers.TransactionResponse | ||
| ): Promise<FullSwapERC20> => { | ||
| const receipt = await tx.wait() | ||
| const transfers: any = [] | ||
| for (let i = 0; i < receipt.logs.length; i++) { | ||
| let parsed: ethers.utils.LogDescription | ||
| try { | ||
| parsed = swapInterface.parseLog(receipt.logs[i]) | ||
| } catch (e) { | ||
| continue | ||
| } | ||
| if (parsed && parsed.name === 'SwapERC20') { | ||
| let transfer: any | ||
| while (i--) { | ||
| if ((transfer = parseTransfer(receipt.logs[i]))) { | ||
| transfers.push(transfer) | ||
| } | ||
| } | ||
| break | ||
| } | ||
| } | ||
|
|
||
| const [fee, signer, sender] = transfers | ||
| if (fee.from !== event.signerWallet) | ||
| throw new Error( | ||
| 'unable to get SwapERC20 params: found incorrect fee transfer (wrong signerWallet)' | ||
| ) | ||
| if (signer.from !== event.signerWallet) | ||
| throw new Error( | ||
| 'unable to get SwapERC20 params: found incorrect signer transfer (wrong signerWallet)' | ||
| ) | ||
| if (signer.from !== sender.to) | ||
| throw new Error( | ||
| 'unable to get SwapERC20 params: signer transfer mismatched sender transfer' | ||
| ) | ||
| if (sender.from !== signer.to) | ||
| throw new Error( | ||
| 'unable to get SwapERC20 params: sender transfer mismatched signer transfer' | ||
| ) | ||
|
|
||
| return { | ||
| ...event, | ||
| signerToken: signer.token, | ||
| signerAmount: signer.amount.toString(), | ||
| senderWallet: sender.from, | ||
| senderToken: sender.token, | ||
| senderAmount: sender.amount.toString(), | ||
| feeAmount: fee.amount.toString(), | ||
| } | ||
| } |
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