aboutsummaryrefslogtreecommitdiffstats
path: root/src/ts/0x.js.ts
diff options
context:
space:
mode:
Diffstat (limited to 'src/ts/0x.js.ts')
-rw-r--r--src/ts/0x.js.ts31
1 files changed, 28 insertions, 3 deletions
diff --git a/src/ts/0x.js.ts b/src/ts/0x.js.ts
index 95446ad74..dd67c49a0 100644
--- a/src/ts/0x.js.ts
+++ b/src/ts/0x.js.ts
@@ -1,6 +1,31 @@
+import * as ethUtil from 'ethereumjs-util';
+
+/**
+ * Elliptic Curve signature
+ */
+export interface ECSignature {
+ v: number;
+ r: string;
+ s: string;
+}
+
export class ZeroEx {
- /** Verifies the signature */
- public verifySignature() {
- // TODO
+ /**
+ * Verifies that the elliptic curve signature `signature` was generated
+ * by signing `data` with the private key corresponding to the `signer` address.
+ */
+ public static isValidSignature(data: string, signature: ECSignature, signer: ETHAddressHex): boolean {
+ const dataBuff = ethUtil.toBuffer(data);
+ const msgHashBuff = ethUtil.hashPersonalMessage(dataBuff);
+ try {
+ const pubKey = ethUtil.ecrecover(msgHashBuff,
+ signature.v,
+ ethUtil.toBuffer(signature.r),
+ ethUtil.toBuffer(signature.s));
+ const retrievedAddress = ethUtil.bufferToHex(ethUtil.pubToAddress(pubKey));
+ return retrievedAddress === signer;
+ } catch (err) {
+ return false;
+ }
}
}