Merge pull request #21 from ChainSafe/cayman/eth2-validator-paths

Add eth2ValidatorPaths utility
ChainSafe · Aug 11, 2020 · 482bc69 · 482bc69
2 parents fd1ed98 + ced392a
commit 482bc69
Showing 1 changed file with 16 additions and 2 deletions.
diff --git a/src/index.ts b/src/index.ts
@@ -54,13 +54,27 @@ export interface IEth2ValidatorKeys {
   signing: Buffer;
 }
 
+/**
+ * Return Eth2 validator HD paths
+ */
+export function eth2ValidatorPaths(validatorIndex: number): {
+  withdrawal: string;
+  signing: string;
+} {
+  return {
+    withdrawal: `m/12381/3600/${validatorIndex}/0`,
+    signing: `m/12381/3600/${validatorIndex}/0/0`,
+  };
+}
+
 /**
  * Derive Eth2 validator secret keys from a single master secret key
  * @param masterKey master secret key
  */
 export function deriveEth2ValidatorKeys(masterKey: Buffer, validatorIndex: number): IEth2ValidatorKeys {
+  const paths = eth2ValidatorPaths(validatorIndex);
   return {
-    withdrawal: deriveKeyFromMaster(masterKey, `m/12381/3600/${validatorIndex}/0`),
-    signing: deriveKeyFromMaster(masterKey, `m/12381/3600/${validatorIndex}/0/0`),
+    withdrawal: deriveKeyFromMaster(masterKey, paths.withdrawal),
+    signing: deriveKeyFromMaster(masterKey, paths.signing),
   };
 }