fix: user get balance

.yarn/versions/9d88b67e.yml

@@ -0,0 +1,3 @@
+releases:
+  "@near-eth/nep141-erc20": patch
+  rainbow-bridge-client-monorepo: patch

packages/nep141-erc20/src/natural-erc20/getBalance.js

@@ -0,0 +1,15 @@
+import Web3 from 'web3'
+import { getEthProvider } from '@near-eth/client/dist/utils'
+
+export default async function getBalance (address, user) {
+  if (!user) return null
+
+  const web3 = new Web3(getEthProvider())
+
+  const erc20Contract = new web3.eth.Contract(
+    JSON.parse(process.env.ethErc20AbiText),
+    address
+  )
+
+  return await erc20Contract.methods.balanceOf(user).call()
+}

packages/nep141-erc20/src/natural-erc20/getMetadata.js

@@ -2,17 +2,21 @@ import Web3 from 'web3'
 import getName from './getName'
 import { getEthProvider } from '@near-eth/client/dist/utils'
 
-async function getBalance (address, user) {
-  if (!user) return null
+const erc20Symbols = {}
+export async function getSymbol (address) {
+  if (erc20Symbols[address]) return erc20Symbols[address]
 
   const web3 = new Web3(getEthProvider())
 
-  const erc20Contract = new web3.eth.Contract(
+  const contract = new web3.eth.Contract(
     JSON.parse(process.env.ethErc20AbiText),
     address
   )
 
-  return await erc20Contract.methods.balanceOf(user).call()
+  erc20Symbols[address] = await contract.methods.symbol().call()
+    .catch(() => address.slice(0, 5) + '…')
+
+  return erc20Symbols[address]
 }
 
 const erc20Decimals = {}
@@ -56,29 +60,21 @@ async function getIcon (address) {
 
 /**
  * Fetch name, icon, and decimals (precision) of ERC20 token with given `address`.
- *
- * Can provide an Ethereum wallet address as second argument, in which case that
- * wallet's balance will also be returned. If omitted, `balance` is returned as `null`.
- *
- * Values other than `balance` are cached.
- *
  * @param address ERC20 token contract address
- * @param user (optional) Ethereum wallet address that may hold tokens with given `address`
- *
- * @returns {Promise<{ address: string, balance: number|null, decimals: number, icon: string|null, name: string }>}
+ * @returns {Promise<{ address: string, decimals: number, icon: string|null, name: string }>}
  */
-export default async function getErc20Data (address, user) {
-  const [balance, decimals, icon, name] = await Promise.all([
-    getBalance(address, user),
+export default async function getMetadata (address) {
+  const [decimals, icon, name, symbol] = await Promise.all([
     getDecimals(address),
     getIcon(address),
-    getName(address)
+    getName(address),
+    getSymbol(address)
   ])
   return {
     address,
-    balance,
     decimals,
     icon,
-    name
+    name,
+    symbol
   }
 }

packages/nep141-erc20/src/natural-erc20/getName.js

@@ -12,7 +12,7 @@ export default async function getName (address) {
     address
   )
 
-  erc20Names[address] = await contract.methods.symbol().call()
+  erc20Names[address] = await contract.methods.name().call()
     .catch(() => address.slice(0, 5) + '…')
 
   return erc20Names[address]

packages/nep141-erc20/src/natural-erc20/index.js

@@ -1,3 +1,4 @@
+export { getBalance } from './getBalance'
 export { default as getMetadata } from './getMetadata'
 export { default as getAllowance } from './getAllowance'
 export { default as getName } from './getName'

packages/nep141-erc20/tsconfig.json

@@ -1,6 +1,6 @@
 {
   "extends": "../../tsconfig.json",
-  "include": ["src/*"],
+  "include": ["src/*", "src/natural-erc20/getBalance.js"],
   "compilerOptions": {
     "allowJs": true,                          /* Allow javascript files to be compiled. */
     "outDir": "./dist/"