Withdraw ERC20

Withdraw ERC20 from Loopring L2 to Ethereum L1

Withdrawing an ERC20 token will move it from the Loopring Layer2 environment to Ethereum Layer1.

Trade value should with decimals sdk.toBig(value).times("1e" + TOKEN_INFO.tokenMap.LRC.decimals)

Step 1: GetAccount

const {accInfo} = await LoopringAPI.exchangeAPI.getAccount({
  owner: LOOPRING_EXPORTED_ACCOUNT.address,
});
console.log("accInfo:", accInfo);

Step 2: Get eddsaKey

const eddsaKey = await signatureKeyPairMock(accInfo);
console.log("eddsaKey:", eddsaKey.sk);

Step 3: Get apiKey

const {apiKey} = await LoopringAPI.userAPI.getUserApiKey({
    accountId: accInfo.accountId,
  },
  eddsaKey.sk
);
console.log("apiKey:", apiKey);

Step 4: Get storageId

const storageId = await LoopringAPI.userAPI.getNextStorageId({
    accountId: accInfo.accountId,
    sellTokenId: TOKEN_INFO.tokenMap["LRC"].tokenId,
  },
  apiKey
);
console.log("storageId:", storageId);

Step 5: Get fee

const fee = await LoopringAPI.userAPI.getOffchainFeeAmt({
    accountId: accInfo.accountId,
    requestType: sdk.OffchainFeeReqType.OFFCHAIN_WITHDRAWAL,
    tokenSymbol: TOKEN_INFO.tokenMap["LRC"].symbol,
  },
  apiKey
);
console.log("fee:", fee);

Step 6: Withdraw

const response = await LoopringAPI.userAPI.submitOffchainWithdraw({
  request: {
    exchange: LOOPRING_EXPORTED_ACCOUNT.exchangeAddress,
    accountId: LOOPRING_EXPORTED_ACCOUNT.accountId,
    counterFactualInfo: undefined,
    fastWithdrawalMode: false,
    hashApproved: "",
    maxFee: {
      tokenId: TOKEN_INFO.tokenMap["LRC"].tokenId,
      volume: fee.fees["LRC"].fee ?? "9400000000000000000",
    },
    minGas: 0,
    owner: LOOPRING_EXPORTED_ACCOUNT.address,
    to: LOOPRING_EXPORTED_ACCOUNT.address,
    storageId: 0,
    token: {
      tokenId: TOKEN_INFO.tokenMap.LRC.tokenId,
      volume: LOOPRING_EXPORTED_ACCOUNT.tradeLRCValue.toString(),
    },
    validUntil: 0,
  },
  web3,
  chainId: sdk.ChainId.GOERLI,
  walletType: sdk.ConnectorNames.MetaMask,
  eddsaKey: eddsaKey.sk,
  apiKey,
});
console.log("response:", response);