Signature

Definition: Loopring SDK support EOA (EOA hardware wallet) & Loopring smart wallet signature.
 Environment  type    
For Browser extension, Dapp, and hardware wallet,  we only support EOA
For Loopring smart wallet (App), the provider gateway is WalletConnect
The following are the provider gateways we inject & test:
MetaMask (Ledger, Trezor)
WalletConnect (Authereum, Loopring smart wallet )
Coinbase
​Coming soon...​
For signature:
 Understand  what is  eth_sign signing types (eth_sign, personal_sign, v1, v3, v4)
❗ when add SigSuffix 02|03 (please follow:  EIP712 & signTypedData_v4  + 02, personal_sign + 03)
for v4 ecdsaSignature the result signature should + SigSuffix.Suffix02;
for personal_sign ecdsaSignature the result signature should + SigSuffix.Suffix03;
EOA:
For Browser extension (More information: signing-data)
common EOA we use the v4 signature and web3.eth.personal.ecRecover validate signature
when v4 signature is failed for any step, we will try personal_sign and web3.eth.personal.ecRecover validate signature
For Dapp
when loopring Dex is inside Dapp Webview & connect by window.ethereum, we remove the web3.eth.personal.ecRecover validate
Loopring smart wallet:
For Loopring smart wallet we send eth_signTypedData by walletConnect & validate ABI.Contracts.ContractWallet.encodeInputs isValidSignature(bytes32,bytes)
Loopring counterfactual wallet:
signature is same as Loopring smart wallet
But ecRecover is by walletOwner, const {walletOwner} = await LoopringAPI.exchangeAPI.getCounterFactualInfo({ accountId: LOOPRING_EXPORTED_ACCOUNT.accountIdCF, });
Demo Signature
generateKeyPair
const {accInfo} = await LoopringAPI.exchangeAPI.getAccount({
  owner: LOOPRING_EXPORTED_ACCOUNT.address,
});
const result = await signatureKeyPairMock(accInfo);
console.log(result.sk);
​
getEcDSASig: eth_signTypedData_v4
// test case is not allow brock by Mock provider
const result = await sdk.getEcDSASig(
  web3,
  testTypedData,
  LOOPRING_EXPORTED_ACCOUNT.address,
  sdk.GetEcDSASigType.HasDataStruct,
  sdk.ChainId.GOERLI,
  LOOPRING_EXPORTED_ACCOUNT.accountId,
  "",
  sdk.ConnectorNames.Unknown
);
console.log("getEcDSASig:eth_signTypedData_v4",
  result,
  "ecdsaSig+sdk.SigSuffix.Suffix02",
  result.ecdsaSig + sdk.SigSuffix.Suffix02
);
​
getEcDSASig: personalSign(WithoutDataStruct--Hardware wallet)
const result = await sdk.getEcDSASig(
  web3,
  testTypedData,
  LOOPRING_EXPORTED_ACCOUNT.address,
  sdk.GetEcDSASigType.WithoutDataStruct,
  sdk.ChainId.GOERLI,
  LOOPRING_EXPORTED_ACCOUNT.accountId,
  "",
  sdk.ConnectorNames.Unknown
);
console.log(
  "getEcDSASig:WithoutDataStruct(personalSign)",
  result,
  "ecdsaSig+sdk.SigSuffix.Suffix03",
  result.ecdsaSig + sdk.SigSuffix.Suffix03
);
​
getEcDSASig: personalSign(Contract)
// test case is not allow brock by Mock provider
const result = await sdk.getEcDSASig(
  web3,
  testTypedData,
  LOOPRING_EXPORTED_ACCOUNT.address,
  sdk.GetEcDSASigType.Contract,
  sdk.ChainId.GOERLI,
  LOOPRING_EXPORTED_ACCOUNT.accountId,
  "",
  sdk.ConnectorNames.Unknown
);
console.log(
  "getEcDSASig:personalSign(Contract)",
  result
);
Validate signature
​github: src/api/base_api.ts#personalSign​
 export async function personalSign(
  web3: any,
  account: string | undefined,
  pwd: string,
  msg: string,
  walletType: ConnectorNames,
  chainId: ChainId,
  accountId?: number,
  counterFactualInfo?: CounterFactualInfo,
  isMobile?: boolean
) {
  if (!account) {
    return { error: "personalSign got no account" };
  }
​
  return new Promise((resolve) => {
    try {
      web3.eth.personal.sign(
        msg,
        account,
        pwd,
        async function (err: any, result: any) {
          if (!err) {
            // Valid:1. counter Factual signature Valid
            if (counterFactualInfo && accountId) {
              myLog("fcWalletValid counterFactualInfo accountId:");
              const fcValid = await fcWalletValid(
                web3,
                account,
                msg,
                result,
                accountId,
                chainId,
                counterFactualInfo
              );
              if (fcValid.result) {
                resolve({
                  sig: result,
                  counterFactualInfo: fcValid.counterFactualInfo,
                });
                return;
              }
            }
​
            // Valid: 2. webview directory signature Valid
            if (
              (window?.ethereum?.isImToken || window?.ethereum?.isMetaMask) &&
              isMobile &&
              // Mobile directory connect will sign ConnectorNames as MetaMask only
              walletType === ConnectorNames.MetaMask
            ) {
              const address: string[] = await window.ethereum?.request({
                method: "eth_requestAccounts",
              });
              if (
                address?.find(
                  (item) => item.toLowerCase() === account.toLowerCase()
                )
              ) {
                return resolve({ sig: result });
              }
            }
​
            // Valid: 3. EOA signature Valid by ecRecover
            const valid: any = await ecRecover(web3, account, msg, result);
            if (valid.result) {
              return resolve({ sig: result });
            }
​
            // Valid: 4. contractWallet signature Valid `isValidSignature(bytes32,bytes)`
            const walletValid2: any = await contractWalletValidate32(
              web3,
              account,
              msg,
              result
            );
​
            if (walletValid2.result) {
              return resolve({ sig: result });
            }
​
            // Valid: 5. counter Factual signature Valid when no counterFactualInfo
            if (accountId) {
              const fcValid = await fcWalletValid(
                web3,
                account,
                msg,
                result,
                accountId,
                chainId
              );
              if (fcValid.result) {
                return resolve({
                  sig: result,
                  counterFactualInfo: fcValid.counterFactualInfo,
                });
              }
            }
​
            // Valid: 6. myKeyValid Valid again
            const myKeyValid: any = await mykeyWalletValid(
              web3,
              account,
              msg,
              result
            );
​
            if (myKeyValid.result) {
              return resolve({ sig: result });
            }
​
            // Valid: Error cannot pass personalSign Valid
            // eslint-disable-next-line no-console
            console.log(
              "web3.eth.personal.sign Valid, valid 5 ways, all failed!"
            );
            return resolve({
              error: "web3.eth.personal.sign Valid, valid 5 ways, all failed!",
            });
          } else {
            return resolve({
              error: "personalSign err before Validate:" + err,
            });
          }
        }
      );
    } catch (reason) {
      resolve({ error: reason });
    }
  });
}
Extra ECDSA authentic in header
ECDSA signature
Last modified 9mo ago