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-rw-r--r--packages/order-utils/src/artifacts.ts6
-rw-r--r--packages/order-utils/src/signature_utils.ts42
2 files changed, 43 insertions, 5 deletions
diff --git a/packages/order-utils/src/artifacts.ts b/packages/order-utils/src/artifacts.ts
index 6eb5ad0c0..f6fd00472 100644
--- a/packages/order-utils/src/artifacts.ts
+++ b/packages/order-utils/src/artifacts.ts
@@ -1,8 +1,10 @@
import { Artifact } from '@0xproject/types';
import * as Exchange from './artifacts/Exchange.json';
-import * as ISigner from './artifacts/ISigner.json';
+import * as IValidator from './artifacts/IValidator.json';
+import * as IWallet from './artifacts/IWallet.json';
export const artifacts = {
Exchange: (Exchange as any) as Artifact,
- ISigner: (ISigner as any) as Artifact,
+ IWallet: (IWallet as any) as Artifact,
+ IValidator: (IValidator as any) as Artifact,
};
diff --git a/packages/order-utils/src/signature_utils.ts b/packages/order-utils/src/signature_utils.ts
index 8e387a6ae..427448260 100644
--- a/packages/order-utils/src/signature_utils.ts
+++ b/packages/order-utils/src/signature_utils.ts
@@ -7,7 +7,8 @@ import * as _ from 'lodash';
import { artifacts } from './artifacts';
import { assert } from './assert';
import { ExchangeContract } from './generated_contract_wrappers/exchange';
-import { ISignerContract } from './generated_contract_wrappers/i_signer';
+import { IWalletContract } from './generated_contract_wrappers/i_signer';
+import { IValidatorContract } from './generated_contract_wrappers/i_validator';
import { MessagePrefixOpts, MessagePrefixType, OrderError } from './types';
/**
@@ -51,12 +52,27 @@ export async function isValidSignatureAsync(
throw new Error('Caller signature type cannot be validated off-chain');
case SignatureType.Wallet: {
- const signerContract = new ISignerContract(artifacts.ISigner.abi, signerAddress, provider);
+ const signerContract = new IWalletContract(artifacts.IWallet.abi, signerAddress, provider);
const isValid = await signerContract.isValidSignature.callAsync(data, signature);
return isValid;
}
- // TODO: Add SignatureType.Validator
+ case SignatureType.Validator: {
+ const validatorAddress = getValidatorAddressFromSignature(signature);
+ const exchangeContract = new ExchangeContract(artifacts.Exchange.abi, signerAddress, provider);
+ const isValidatorApproved = await exchangeContract.allowedValidators.callAsync(
+ signerAddress,
+ validatorAddress,
+ );
+ if (!isValidatorApproved) {
+ throw new Error(`Validator ${validatorAddress} was not pre-approved by ${signerAddress}.`);
+ }
+
+ const validatorSignature = getValidatorSignatureFromSignature(signature);
+ const validatorContract = new IValidatorContract(artifacts.IValidator.abi, signerAddress, provider);
+ const isValid = await validatorContract.isValidSignature.callAsync(data, signerAddress, validatorSignature);
+ return isValid;
+ }
case SignatureType.PreSigned: {
return isValidPresignedSignatureAsync(provider, data, signature, signerAddress);
@@ -219,6 +235,26 @@ function parseECSignature(signature: string): ECSignature {
return ecSignature;
}
+function getValidatorSignatureFromSignature(signature: string): string {
+ const signatureTypeIndex = getSignatureTypeIndexIfExists(signature);
+ if (signatureTypeIndex !== SignatureType.Validator) {
+ throw new Error('Cannot get validator address from non-validator signature');
+ }
+ // tslint:disable-next-line:custom-no-magic-numbers
+ const validatorSignature = signature.slice(0, -22);
+ return validatorSignature;
+}
+
+function getValidatorAddressFromSignature(signature: string): string {
+ const signatureTypeIndex = getSignatureTypeIndexIfExists(signature);
+ if (signatureTypeIndex !== SignatureType.Validator) {
+ throw new Error('Cannot get validator address from non-validator signature');
+ }
+ // tslint:disable-next-line:custom-no-magic-numbers
+ const validatorAddress = signature.slice(-22, -2);
+ return `0x${validatorAddress}`;
+}
+
function getSignatureTypeIndexIfExists(signature: string): number {
const unprefixedSignature = ethUtil.stripHexPrefix(signature);
// tslint:disable-next-line:custom-no-magic-numbers