Add additional ethereum utils

packages/ethereum-utils/lib/index.js

@@ -1,4 +1,6 @@
 import { Block, Transaction } from '@liquality/schema'
+import { padHexStart } from '@liquality/crypto'
+import eip55 from 'eip55'
 
 import { version } from '../package.json'
 
@@ -20,6 +22,26 @@ function remove0x (hash) {
   return (typeof hash === 'string') ? hash.replace(/^0x/, '') : hash
 }
 
+/**
+ * Converts an ethereum address to the standard format
+ * @param {*} address
+ */
+function removeAddress0x (address) {
+  return remove0x(address).toLowerCase()
+}
+
+function checksumEncode (hash) {
+  return eip55.encode(ensure0x(hash))
+}
+
+function ensureBlockFormat (block) {
+  if (block === undefined) {
+    return 'latest'
+  } else {
+    return (typeof(block) === 'number') ? ensure0x(padHexStart(block.toString(16))) : block
+  }
+}
+
 function formatEthResponse (obj) {
   if (typeof obj === 'string' || obj instanceof String) {
     obj = remove0x(obj)
@@ -66,6 +88,8 @@ function normalizeTransactionObject (tx, currentHeight) {
 export {
   ensure0x,
   remove0x,
+  removeAddress0x,
+  checksumEncode,
   formatEthResponse,
   normalizeTransactionObject,
 

packages/ethereum-utils/package.json

@@ -18,7 +18,9 @@
   "license": "MIT",
   "dependencies": {
     "@babel/runtime": "^7.4.3",
-    "@liquality/schema": "^0.2.7"
+    "@liquality/crypto": "^0.2.7",
+    "@liquality/schema": "^0.2.7",
+    "eip55": "^1.0.3"
   },
   "engines": {
     "node": "~8.12.0"