1 files changed, 3 insertions, 2 deletions
diff --git a/src/ts/globals.d.ts b/src/ts/globals.d.ts
index 0f7391b39..9b81e15bd 100644
--- a/src/ts/globals.d.ts
+++ b/src/ts/globals.d.ts
@@ -1,11 +1,12 @@
 declare type ETHPublicKey = string;
 declare type ETHAddressHex = string;
+declare type HexString = string;
 declare type ETHAddressBuff = Buffer;
 
 declare module 'ethereumjs-util' {
-    const toBuffer: (data: string) => Buffer;
+    const toBuffer: (data: HexString) => Buffer;
     const hashPersonalMessage: (msg: Buffer) => Buffer;
-    const bufferToHex: (buff: Buffer) => string;
+    const bufferToHex: (buff: Buffer) => HexString;
     const ecrecover: (msgHashBuff: Buffer, v: number, r: Buffer, s: Buffer) => ETHPublicKey;
     const pubToAddress: (pubKey: ETHPublicKey) => ETHAddressBuff;
 }