feat: add light node upgrade top up methods (#372)

* feat: add top up

* chore: remove console.log

* build: add pseudo-missing dependency

* feat: add missing top up components

* fix: crypto route

* feat(wip): add gift wallet logic

* fix: fix gift wallet flows

* feat: simplify flow without fund step

* feat: add loading screens

* fix: remove alert

* fix: prepend http if needed

* fix: fix bug that was reintroduced with merge

* refactor: rename minusEther to minusBaseUnits

* fix: remove unused setStartedAt

* build: remove unused dependency

src/utils/rpc.ts

@@ -1,14 +1,15 @@
 import { debounce } from '@material-ui/core'
 import axios from 'axios'
-import { Contract, providers } from 'ethers'
+import { Contract, providers, Wallet } from 'ethers'
+import { bzzContractInterface } from './bzz-contract-interface'
 
-const PROVIDER = 'https://gno.getblock.io/mainnet/?api_key=d7b92d96-9784-49a8-a800-b3edd1647fc7'
+export const JSON_RPC_PROVIDER = 'https://gno.getblock.io/mainnet/?api_key=d7b92d96-9784-49a8-a800-b3edd1647fc7'
 
 async function eth_getBalance(address: string): Promise<string> {
   if (!address.startsWith('0x')) {
     address = `0x${address}`
   }
-  const response = await axios(PROVIDER, {
+  const response = await axios(JSON_RPC_PROVIDER, {
     method: 'POST',
     headers: {
       'content-type': 'application/json',
@@ -24,6 +25,23 @@ async function eth_getBalance(address: string): Promise<string> {
   return response.data.result
 }
 
+async function eth_getBlockByNumber(provider = JSON_RPC_PROVIDER): Promise<string> {
+  const response = await axios(provider, {
+    method: 'POST',
+    headers: {
+      'content-type': 'application/json',
+    },
+    data: {
+      jsonrpc: '2.0',
+      method: 'eth_getBlockByNumber',
+      params: ['latest', false],
+      id: 1,
+    },
+  })
+
+  return response.data.result
+}
+
 const partialERC20tokenABI = [
   {
     constant: true,
@@ -45,7 +63,7 @@ const partialERC20tokenABI = [
   },
 ]
 
-const provider = new providers.JsonRpcProvider(PROVIDER)
+const provider = new providers.JsonRpcProvider(JSON_RPC_PROVIDER)
 
 async function eth_getBalanceERC20(
   address: string,
@@ -60,7 +78,54 @@ async function eth_getBalanceERC20(
   return balance.toString()
 }
 
+interface TransferResponse {
+  transaction: providers.TransactionResponse
+  receipt: providers.TransactionReceipt
+}
+
+export async function sendNativeTransaction(
+  privateKey: string,
+  to: string,
+  value: string,
+  jsonRpcProvider: string,
+): Promise<TransferResponse> {
+  const signer = await makeReadySigner(privateKey, jsonRpcProvider)
+  const gasPrice = await signer.getGasPrice()
+  const transaction = await signer.sendTransaction({ to, value, gasPrice })
+  const receipt = await transaction.wait(1)
+
+  return { transaction, receipt }
+}
+
+export async function sendBzzTransaction(
+  privateKey: string,
+  to: string,
+  value: string,
+  jsonRpcProvider: string,
+): Promise<TransferResponse> {
+  const signer = await makeReadySigner(privateKey, jsonRpcProvider)
+  const gasPrice = await signer.getGasPrice()
+  const bzz = new Contract('0xdBF3Ea6F5beE45c02255B2c26a16F300502F68da', bzzContractInterface, signer)
+  const transaction = await bzz.transfer(to, value, { gasPrice })
+  const receipt = await transaction.wait(1)
+
+  return { transaction, receipt }
+}
+
+async function makeReadySigner(privateKey: string, jsonRpcProvider: string) {
+  const provider = new providers.JsonRpcProvider(jsonRpcProvider, 100)
+  await provider.ready
+  const signer = new Wallet(privateKey, provider)
+
+  return signer
+}
+
 export const Rpc = {
+  sendNativeTransaction,
+  sendBzzTransaction,
+  _eth_getBalance: eth_getBalance,
+  _eth_getBalanceERC20: eth_getBalanceERC20,
   eth_getBalance: debounce(eth_getBalance, 1_000),
   eth_getBalanceERC20: debounce(eth_getBalanceERC20, 1_000),
+  eth_getBlockByNumber,
 }