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-rw-r--r--packages/order-utils/src/signature_utils.ts22
1 files changed, 19 insertions, 3 deletions
diff --git a/packages/order-utils/src/signature_utils.ts b/packages/order-utils/src/signature_utils.ts
index 70637e2ac..f1466973c 100644
--- a/packages/order-utils/src/signature_utils.ts
+++ b/packages/order-utils/src/signature_utils.ts
@@ -66,9 +66,7 @@ export async function isValidSignatureAsync(
}
case SignatureType.PreSigned: {
- const exchangeContract = new ExchangeContract(artifacts.Exchange.abi, signerAddress, provider);
- const isValid = await exchangeContract.preSigned.callAsync(data, signerAddress);
- return true;
+ return isValidPresignedSignatureAsync(provider, data, signature, signerAddress);
}
default:
@@ -77,6 +75,24 @@ export async function isValidSignatureAsync(
}
/**
+ * Verifies that the provided presigned signature is valid according to the 0x Protocol smart contracts
+ * @param data The hex encoded data signed by the supplied signature.
+ * @param signature A hex encoded presigned 0x Protocol signature made up of: [SignatureType.Presigned]
+ * @param signerAddress The hex encoded address that signed the data, producing the supplied signature.
+ * @return Whether the data was preSigned by the supplied signerAddress.
+ */
+export async function isValidPresignedSignatureAsync(
+ provider: Provider,
+ data: string,
+ signature: string,
+ signerAddress: string,
+): Promise<boolean> {
+ const exchangeContract = new ExchangeContract(artifacts.Exchange.abi, signerAddress, provider);
+ const isValid = await exchangeContract.preSigned.callAsync(data, signerAddress);
+ return isValid;
+}
+
+/**
* Checks if the supplied elliptic curve signature corresponds to signing `data` with
* the private key corresponding to `signerAddress`
* @param data The hex encoded data signed by the supplied signature.