add `publicKeyToETHAddress` fn (#536)

packages/status-js/src/utils/public-key-to-eth-address.test.ts

@@ -0,0 +1,11 @@
+import { expect, test } from 'vitest'
+
+import { publicKeyToETHAddress } from './public-key-to-eth-address'
+
+test('should return ETH address from public key', () => {
+  expect(
+    publicKeyToETHAddress(
+      '0x02bcbe39785b55a22383f82ac631ea7500e204627369c4ea01d9296af0ea573f57'
+    )
+  ).toEqual('0x0A1ec0002dDB927B03049F1aD8D589aBEA4Ba4b3')
+})

packages/status-js/src/utils/public-key-to-eth-address.ts

@@ -0,0 +1,12 @@
+import { ethers } from 'ethers'
+
+import { deserializePublicKey } from './deserialize-public-key'
+
+export function publicKeyToETHAddress(publicKey: string): string {
+  const key = deserializePublicKey(publicKey, {
+    compress: false,
+  })
+  const address = ethers.computeAddress(key)
+
+  return address
+}