优化转账gas计算

.env.development

@@ -46,3 +46,9 @@ HASH_SALT='iG4Rpsa)6U31$H#^T85$^^3'
 # 游戏服, 支付上报地址
 GAME_PAY_CB_URL=https://game2006api-test.kingsome.cn/webapp/index.php
 REDIS=redis://127.0.0.1:6379/14
+
+# CHAIN_RPC_URL=https://arb1.arbitrum.io/rpc
+CHAIN_RPC_URL=https://arb-mainnet.g.alchemy.com/v2/tFPlLg-MT8uGkM5wKHyoBqEHWJJ0o3Nt
+CHAIN_CEG_ADDRESS=0x741482aE1480E552735E44Ff3A733448AcBbeD8d
+CHAIN_WALLET_ADDRESS=0x9c257b7830566e889cd2eef906541f130d4a75f6
+CHAIN_GAS_BOOST=1.3

src/api.server.ts

@@ -9,6 +9,7 @@ import { ConnectOptions } from 'mongoose'
 import CodeTaskSchedule from 'schedule/codetask.schedule'
 import { PriceSvr } from 'service/price.svr'
 import { GooglePaySvr } from 'service/googlepay.svr'
+import { GasSvr } from 'service/gas.svr'
 
 const zReqParserPlugin = require('plugins/zReqParser')
 
@@ -90,6 +91,7 @@ export class ApiServer {
   initSchedules() {
     new CodeTaskSchedule().scheduleAll()
     new PriceSvr().scheduleAll()
+    new GasSvr().scheduleAll()
   }
 
   async connectDB() {

src/controllers/alchemy.controller.ts

@@ -1,12 +1,13 @@
 import logger from 'logger/logger'
-import BaseController from 'common/base.controller'
+import BaseController, { ROLE_ANON } from 'common/base.controller'
 import { ZError } from 'common/ZError'
-import { router } from 'decorators/router'
+import { role, router } from 'decorators/router'
 import { createOrder, queryFiat, queryPrice, refreshToken } from 'service/alchemy.svr'
 import { generateKVStr } from 'utils/net.util'
 import { PayRecord, PayStatus } from 'modules/PayRecord'
 import { PriceSvr } from 'service/price.svr'
 import { reportPayResult } from 'service/game.svr'
+import { GasSvr } from 'service/gas.svr'
 
 const CALL_BACK_URL = `${process.env.ALCHEMY_PAY_CB_URL}/pay/out/alchemy/result`
 class AlchemyController extends BaseController {
@@ -47,6 +48,9 @@ class AlchemyController extends BaseController {
     // 根据 `查询数字货币接口` 返回的数据, 预估可获得的数字货币数量
     // 用户法币接口做简单的验证
     let priceData = await queryPrice({ crypto, network, fiat, amount: fiatAmount, payWayCode, country })
+    if (!priceData.success) {
+      throw new ZError(14, priceData.returnMsg || 'fetch price error')
+    }
     logger.debug('pirce data::', JSON.stringify(priceData))
     let amountEstimate = priceData.data.cryptoAmount
     let record = new PayRecord({
@@ -101,19 +105,15 @@ class AlchemyController extends BaseController {
     if (!token || !chain) {
       throw new ZError(11, 'token or network not found')
     }
-    if (
-      (chain.toLowerCase() === 'agor' || chain.toLowerCase() === 'eth') &&
-      (token.toLowerCase() === 'ceg' || token.toLowerCase() === 'cec')
-    ) {
-      return { price: 1 }
+    // ceg价格固定为0.1
+    if ((chain.toLowerCase() === 'agor' || chain.toLowerCase() === 'eth') && token.toLowerCase() === 'ceg') {
+      return { price: 0.1 }
     }
     if ((chain.toLowerCase() === 'agor' || chain.toLowerCase() === 'eth') && token.toLowerCase() === 'agor') {
       token = 'ETH'
-      chain = 'ETH'
-    }
-    if (token.toLowerCase() === 'ceg') {
-      return { price: 1 }
+      chain = 'ARBITRUM'
     }
+
     let data = {
       crypto: token,
       network: chain,
@@ -131,4 +131,12 @@ class AlchemyController extends BaseController {
     }
     return result.data
   }
+
+  @role(ROLE_ANON)
+  @router('post /pay/alchemy/estimateGas')
+  async estimateGas(req, res) {
+    let { crypto, network } = req.params
+    let gas = await new GasSvr().estimateGas({ crypto, network })
+    return { gas }
+  }
 }

src/controllers/alchemyout.controller.ts

@@ -9,6 +9,7 @@ import { TransferRecord } from 'modules/TransferRecord'
 import { reportPayResult } from 'service/game.svr'
 import { PriceSvr } from 'service/price.svr'
 import { OrderCacheSvr } from 'service/ordercache.svr'
+import { GasSvr } from 'service/gas.svr'
 
 let errorRes = function (msg: string) {
   logger.info(`error res: ${msg}`)
@@ -108,7 +109,8 @@ class AlchemyOutController extends BaseController {
     if (!checkSha1Sign(req.headers)) {
       return errorRes('sign error')
     }
-    let gas = 36000 * 0.0000000001
+    let gas = await new GasSvr().estimateGas({ crypto, network: 'ARBITRUM' })
+    gas = gas * 0.0000000001
     let price = await new PriceSvr().fetchPrice({ crypto: 'ETH', network: 'ARBITRUM', fiat: 'USD' })
     let networkFee = gas * parseFloat(price)
     let result = {

src/service/chain.svr.ts

@@ -29,3 +29,71 @@ export async function fetchGasPrice(data) {
   }
   return axios(reqConfig)
 }
+/**
+ success: {
+    "jsonrpc": "2.0",
+    "id": 1,
+    "result": "0x77b49"
+}
+error: {
+    "error": {
+        "code": 3,
+        "data": "0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001d45524332303a20696e73756666696369656e7420616c6c6f77616e6365000000",
+        "message": "execution reverted: ERC20: insufficient allowance"
+    },
+    "id": 1,
+    "jsonrpc": "2.0"
+}
+ */
+export async function erc20TransferGas() {
+  let url = process.env.CHAIN_RPC_URL
+  let address = process.env.CHAIN_CEG_ADDRESS
+  let walletAddress = process.env.CHAIN_WALLET_ADDRESS
+  let reqData = {
+    jsonrpc: '2.0',
+    id: 1,
+    method: 'eth_estimateGas',
+    params: [
+      {
+        data: '0x23b872dd0000000000000000000000009c257b7830566e889cd2eef906541f130d4a75f600000000000000000000000042448c6a38c08637218d8327b748f213fc2c02310000000000000000000000000000000000000000000000000000000000000000',
+        from: walletAddress,
+        to: address,
+      },
+    ],
+  }
+  let reqConfig: any = {
+    method: 'post',
+    url,
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    data: JSON.stringify(reqData),
+  }
+  return axios(reqConfig)
+}
+
+export async function ethTransferGas() {
+  let url = process.env.CHAIN_RPC_URL
+  let walletAddress = process.env.CHAIN_WALLET_ADDRESS
+  let reqData = {
+    jsonrpc: '2.0',
+    id: 1,
+    method: 'eth_estimateGas',
+    params: [
+      {
+        from: walletAddress,
+        to: walletAddress,
+        value: '0x0',
+      },
+    ],
+  }
+  let reqConfig: any = {
+    method: 'post',
+    url,
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    data: JSON.stringify(reqData),
+  }
+  return axios(reqConfig)
+}

src/service/gas.svr.ts

@@ -0,0 +1,60 @@
+import axios from 'axios'
+import { singleton } from 'decorators/singleton'
+import { queryPrice } from './alchemy.svr'
+import * as schedule from 'node-schedule'
+import logger from 'logger/logger'
+import { erc20TransferGas, ethTransferGas } from './chain.svr'
+
+@singleton
+export class GasSvr {
+  private priceMap: Map<string, number> = new Map()
+
+  public async estimateGas(data: any) {
+    let { crypto, network } = data
+    network = network || 'arbitrum'
+    let key = `${crypto}_${network}`
+    let price = this.priceMap.get(key)
+    if (!price) {
+      await this.refreshOne({ crypto, network })
+      price = this.priceMap.get(key)
+    }
+    return price
+  }
+
+  private async refreshOne(data) {
+    let { crypto, network } = data
+    let key = `${crypto}_${network}`
+    try {
+      let res
+      if (crypto.toLowerCase() === 'ceg') {
+        res = await erc20TransferGas()
+      } else if (crypto.toLowerCase() === 'eth' || crypto.toLowerCase() === 'agor') {
+        res = await ethTransferGas()
+      }
+      let priceData = res.data
+      if (!priceData.error) {
+        let gas = parseInt(priceData.result) * +process.env.CHAIN_GAS_BOOST
+        this.priceMap.set(key, gas)
+      }
+    } catch (e) {
+      logger.debug('update eth gas error: ' + e.message || e)
+    }
+  }
+
+  private async refreshAll() {
+    for (let key of this.priceMap.keys()) {
+      let [crypto, chain] = key.split('_')
+      let data = {
+        crypto,
+        network: chain,
+      }
+      await this.refreshOne(data)
+    }
+  }
+
+  scheduleAll() {
+    const job = schedule.scheduleJob('*/30 * * * * *', async () => {
+      this.refreshAll()
+    })
+  }
+}

src/service/price.svr.ts

@@ -33,9 +33,15 @@ export class PriceSvr {
     let key = `${crypto}_${network}_${fiat}`
     try {
       let priceData = await queryPrice(data)
+      if (priceData.success && priceData.data) {
         this.priceMap.set(key, priceData.data.cryptoPrice + '')
+      } else if (crypto.toLowerCase() === 'eth') {
+        let price = await this.queryEthPrice(crypto)
+        this.priceMap.set(key, price + '')
+      }
     } catch (e) {
       logger.debug('update eth price with alchemy error: ' + e.message || e)
+      if (crypto.toLowerCase() === 'eth') {
         try {
           let price = await this.queryEthPrice(crypto)
           this.priceMap.set(key, price + '')
@@ -44,6 +50,7 @@ export class PriceSvr {
         }
       }
     }
+  }
 
   private async refreshAll() {
     for (let key of this.priceMap.keys()) {