diff --git a/src/controllers/alchemyout.controller.ts b/src/controllers/alchemyout.controller.ts
index dce732a..0247a56 100644
--- a/src/controllers/alchemyout.controller.ts
+++ b/src/controllers/alchemyout.controller.ts
@@ -2,7 +2,7 @@ import logger from 'logger/logger'
 import BaseController, { ROLE_ANON } from 'common/base.controller'
 import { ZError } from 'common/ZError'
 import { role, router } from 'decorators/router'
-import { checkPayResultSign, checkSha1Sign, checkSimpleSign } from 'service/alchemy.svr'
+import { calcNetworkFee, checkPayResultSign, checkSha1Sign, checkSimpleSign } from 'service/alchemy.svr'
 import { PayRecord, PayStatus } from 'modules/PayRecord'
 import { TransferQueue } from 'queue/transfer.queue'
 import { TransferRecord } from 'modules/TransferRecord'
@@ -11,6 +11,7 @@ import { PriceSvr } from 'service/price.svr'
 import { OrderCacheSvr } from 'service/ordercache.svr'
 import { GasSvr } from 'service/gas.svr'
 import { parse } from 'dotenv'
+import { toBigInt, toWei, fromWei, EtherUnits, toBigWei } from 'utils/number.util'
 
 let errorRes = function (msg: string) {
   logger.info(`error res: ${msg}`)
@@ -110,19 +111,13 @@ class AlchemyOutController extends BaseController {
     if (!checkSha1Sign(req.headers)) {
       return errorRes('sign error')
     }
-    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 priceToSend = '0.1'
     if (crypto.toLowerCase() === 'eth') {
       priceToSend = price + ''
     }
     // 20230717 沟通, gas费需要换算成目标货币
-    let networkFee = gas
-    if (crypto.toLowerCase() === 'ceg') {
-      networkFee = networkFee * parseFloat(price) * 10
-    }
-
+    let { networkFee } = await calcNetworkFee(crypto, priceToSend, price)
     let result = {
       direct: 1,
       data: {
@@ -130,7 +125,7 @@ class AlchemyOutController extends BaseController {
         networkList: [
           {
             network: 'ARBITRUM',
-            networkFee: networkFee.toFixed(6),
+            networkFee: fromWei(networkFee),
           },
         ],
       },
@@ -189,13 +184,10 @@ class AlchemyOutController extends BaseController {
     }
     record.cryptoAmount =
       record.network.toLowerCase() === 'agor' && record.crypto.toLowerCase() === 'agor' ? '0.001' : cryptoAmount
-    let gas = await new GasSvr().estimateGas({ crypto, network: 'ARBITRUM' })
-    gas = gas * 0.0000000001
     // 20230718 沟通, cryptoAmount包含了gas费, 需要减去后再发送
-    let networkFee = gas
-    let price = await new PriceSvr().fetchPrice({ crypto: 'ETH', network: 'ARBITRUM', fiat: 'USD' })
-    networkFee = (networkFee * parseFloat(price)) / parseFloat(cryptoPrice)
-    record.cryptoSend = (parseFloat(cryptoAmount) - networkFee).toFixed(10)
+    let { networkFee } = await calcNetworkFee(crypto, cryptoPrice)
+    record.cryptoSend = fromWei(toBigWei(cryptoAmount) - networkFee)
+    record.networkFee = fromWei(networkFee)
     record.cryptoPrice = cryptoPrice
     record.usdtAdmount = usdtAmount
     await record.save()
diff --git a/src/controllers/internal.controller.ts b/src/controllers/internal.controller.ts
index 7691e49..d96fde4 100644
--- a/src/controllers/internal.controller.ts
+++ b/src/controllers/internal.controller.ts
@@ -18,7 +18,7 @@ const notify = async function (record: DocumentType<PayRecordClass>, subTask: Do
   let data: any = {
     orderNo: record.outOrderId, // AlchemyPay订单号
     crypto: record.crypto, // 用户购买的数字货币
-    cryptoAmount: record.cryptoAmount, //用户的提币数量
+    cryptoAmount: record.cryptoSend, //用户的提币数量
     cryptoPrice: record.cryptoPrice, // 实时的价格/USDT CEG锚定USDT
     txHash: record.txHash, // 给用户转账的hash
     network: record.network, // 用户购买的数字货币对应的网络
diff --git a/src/modules/PayRecord.ts b/src/modules/PayRecord.ts
index 8a2db73..9f1b80e 100644
--- a/src/modules/PayRecord.ts
+++ b/src/modules/PayRecord.ts
@@ -61,6 +61,9 @@ export class PayRecordClass extends BaseModule {
   @prop()
   public cryptoSend?: string
 
+  @prop()
+  public networkFee?: string
+
   // 开始创建记录时, 估算的可获取加密货币数量
   @prop()
   public cryptoAmountEstimate?: string
diff --git a/src/service/alchemy.svr.ts b/src/service/alchemy.svr.ts
index cdd260f..33cf4f2 100644
--- a/src/service/alchemy.svr.ts
+++ b/src/service/alchemy.svr.ts
@@ -3,6 +3,9 @@ import { hmacsha256, sha1 } from 'utils/security.util'
 import crypto from 'crypto'
 import { generateKVStr } from 'utils/net.util'
 import logger from 'logger/logger'
+import { GasSvr } from './gas.svr'
+import { toBigInt, toBigWei } from 'utils/number.util'
+import { PriceSvr } from './price.svr'
 
 export function createSimpleSign(data: any) {
   let timestamp = Date.now()
@@ -221,3 +224,21 @@ export async function queryFiat() {
   let response = await axios(config)
   return response.data
 }
+/**
+ * 计算发币需要的gas费, 换算成对应的数字货币
+ * 返回的数值需要fromGwei转换成wei
+ * @param cryptoPrice
+ * @returns
+ */
+export async function calcNetworkFee(crypto: string, cryptoPrice: string, ethPrice?: string) {
+  let gasLimit = await new GasSvr().estimateGas({ crypto, network: 'ARBITRUM' })
+  // let gas = gas * 0.0000000001
+  const gasPriceArb = '100,000,000' // arbitrum one 上gasprice固定为0.1Gwei
+  let eth = toBigInt(gasLimit) * toBigInt(gasPriceArb)
+  // 20230718 沟通, cryptoAmount包含了gas费, 需要减去后再发送
+  if (!ethPrice) {
+    ethPrice = await new PriceSvr().fetchPrice({ crypto: 'ETH', network: 'ARBITRUM', fiat: 'USD' })
+  }
+  let networkFee = (eth * toBigWei(ethPrice)) / toBigWei(cryptoPrice)
+  return { networkFee, ethPrice }
+}
diff --git a/src/service/gas.svr.ts b/src/service/gas.svr.ts
index e56add9..b66ee26 100644
--- a/src/service/gas.svr.ts
+++ b/src/service/gas.svr.ts
@@ -33,7 +33,7 @@ export class GasSvr {
       }
       let priceData = res.data
       if (!priceData.error) {
-        let gas = parseInt(priceData.result) * +process.env.CHAIN_GAS_BOOST
+        let gas = ((priceData.result | 1) * +process.env.CHAIN_GAS_BOOST) | 1
         this.priceMap.set(key, gas)
       }
     } catch (e) {
diff --git a/src/test.ts b/src/test.ts
new file mode 100644
index 0000000..8d38017
--- /dev/null
+++ b/src/test.ts
@@ -0,0 +1,30 @@
+import { GasSvr } from 'service/gas.svr'
+import { PriceSvr } from 'service/price.svr'
+import { fromWei, toBigInt, toBigWei } from 'utils/number.util'
+
+async function main() {
+  let cryptoPrice = '0.1'
+  let cryptoAmount = '10.305'
+  let crypto = 'CEG'
+  let gasLimit = '1,031,856'
+  // let gas = gas * 0.0000000001
+  let gas = toBigWei(gasLimit) / toBigInt('10,000,000,000')
+  // 20230718 沟通, cryptoAmount包含了gas费, 需要减去后再发送
+
+  let price = '1,980.2'
+  let networkFee = (gas * toBigWei(price)) / toBigWei(cryptoPrice)
+  console.log('networkFee::' + fromWei(networkFee))
+  let cryptoSend = fromWei(toBigWei(cryptoAmount) - networkFee)
+  console.log(cryptoSend)
+
+  // let gas = gas * 0.0000000001
+  const gasPriceArb = '100,000,000' // arbitrum one 上gasprice固定为0.1Gwei
+  let eth = toBigInt(gasLimit) * toBigInt(gasPriceArb)
+  let ethPrice = '1,980.2'
+  let networkFee2 = (eth * toBigWei(ethPrice)) / toBigWei(cryptoPrice)
+  console.log('networkFee2::' + fromWei(networkFee2))
+  let cryptoSend2 = fromWei(toBigWei(cryptoAmount) - networkFee2)
+  console.log(fromWei(toBigWei(cryptoSend2)))
+}
+
+main()
diff --git a/src/utils/number.util.ts b/src/utils/number.util.ts
new file mode 100644
index 0000000..cd5733f
--- /dev/null
+++ b/src/utils/number.util.ts
@@ -0,0 +1,218 @@
+export declare type HexString = string
+export declare type Numbers = number | bigint | string | HexString
+
+const isHexStrict = hex => typeof hex === 'string' && /^((-)?0x[0-9a-f]+|(0x))$/i.test(hex)
+export declare type ValidInputTypes = Uint8Array | bigint | string | number | boolean
+export const isHex = (hex: ValidInputTypes): boolean =>
+  typeof hex === 'number' ||
+  typeof hex === 'bigint' ||
+  (typeof hex === 'string' && /^((-0x|0x|-)?[0-9a-f]+|(0x))$/i.test(hex))
+const base = BigInt(10)
+const expo10 = (expo: number) => base ** BigInt(expo)
+
+export const ethUnitMap = {
+  noether: BigInt('0'),
+  wei: BigInt(1),
+  kwei: expo10(3),
+  Kwei: expo10(3),
+  babbage: expo10(3),
+  femtoether: expo10(3),
+  mwei: expo10(6),
+  Mwei: expo10(6),
+  lovelace: expo10(6),
+  picoether: expo10(6),
+  gwei: expo10(9),
+  Gwei: expo10(9),
+  shannon: expo10(9),
+  nanoether: expo10(9),
+  nano: expo10(9),
+  szabo: expo10(12),
+  microether: expo10(12),
+  micro: expo10(12),
+  finney: expo10(15),
+  milliether: expo10(15),
+  milli: expo10(15),
+  ether: expo10(18),
+  kether: expo10(21),
+  grand: expo10(21),
+  mether: expo10(24),
+  gether: expo10(27),
+  tether: expo10(30),
+}
+
+export type EtherUnits = keyof typeof ethUnitMap
+
+/**
+ * Converts value to it's number representation
+ */
+export const hexToNumber = (value: string): bigint | number => {
+  if (!isHexStrict(value)) {
+    throw new Error('Invalid hex string')
+  }
+
+  const [negative, hexValue] = value.startsWith('-') ? [true, value.slice(1)] : [false, value]
+  const num = BigInt(hexValue)
+
+  if (num > Number.MAX_SAFE_INTEGER) {
+    return negative ? -num : num
+  }
+
+  if (num < Number.MIN_SAFE_INTEGER) {
+    return num
+  }
+
+  return negative ? -1 * Number(num) : Number(num)
+}
+
+export const toNumber = (value: Numbers): number | bigint => {
+  if (typeof value === 'number') {
+    return value
+  }
+
+  if (typeof value === 'bigint') {
+    return value >= Number.MIN_SAFE_INTEGER && value <= Number.MAX_SAFE_INTEGER ? Number(value) : value
+  }
+
+  if (typeof value === 'string' && isHexStrict(value)) {
+    return hexToNumber(value)
+  }
+
+  try {
+    return toNumber(BigInt(value))
+  } catch {
+    throw new Error('ivalid number: ' + value)
+  }
+}
+
+/**
+ * Auto converts any given value into it's bigint representation
+ *
+ * @param value - The value to convert
+ * @returns - Returns the value in bigint representation
+
+ * @example
+ * ```ts
+ * console.log(web3.utils.toBigInt(1));
+ * > 1n
+ * ```
+ */
+export const toBigInt = (value: unknown): bigint => {
+  if (typeof value === 'number') {
+    return BigInt(value)
+  }
+
+  if (typeof value === 'bigint') {
+    return value
+  }
+
+  // isHex passes for dec, too
+  if (typeof value === 'string' && isHex(value)) {
+    return BigInt(value)
+  }
+
+  if (typeof value === 'string' && value.indexOf(',') >= 0) {
+    return BigInt(value.replace(/,/g, ''))
+  }
+
+  throw new Error('invalid number' + value)
+}
+
+export const toBigWei = (number: Numbers, unit: EtherUnits = 'ether'): bigint => {
+  return toBigInt(toWei(number, unit))
+}
+
+export const toWei = (number: Numbers, unit: EtherUnits = 'ether'): string => {
+  const denomination = ethUnitMap[unit]
+
+  if (!denomination) {
+    throw new Error('error unit: ' + unit)
+  }
+
+  // if value is decimal e.g. 24.56 extract `integer` and `fraction` part
+  // to avoid `fraction` to be null use `concat` with empty string
+  typeof number === 'string' && number.indexOf(',') >= 0 && (number = number.replace(/,/g, ''))
+  const [integer, fraction] = String(typeof number === 'string' && !isHexStrict(number) ? number : toNumber(number))
+    .split('.')
+    .concat('')
+
+  // join the value removing `.` from
+  // 24.56 -> 2456
+  const value = BigInt(`${integer}${fraction}`)
+
+  // multiply value with denomination
+  // 2456 * 1000000 -> 2456000000
+  const updatedValue = value * denomination
+
+  // count number of zeros in denomination
+  const numberOfZerosInDenomination = denomination.toString().length - 1
+
+  // check which either `fraction` or `denomination` have lower number of zeros
+  const decimals = Math.min(fraction.length, numberOfZerosInDenomination)
+
+  if (decimals === 0) {
+    return updatedValue.toString()
+  }
+
+  // Add zeros to make length equal to required decimal points
+  // If string is larger than decimal points required then remove last zeros
+  return updatedValue.toString().padStart(decimals, '0').slice(0, -decimals)
+}
+
+/**
+ * Takes a number of wei and converts it to any other ether unit.
+ * @param number - The value in wei
+ * @param unit - The unit to convert to
+ * @returns - Returns the converted value in the given unit
+ *
+ * @example
+ * ```ts
+ * console.log(web3.utils.fromWei("1", "ether"));
+ * > 0.000000000000000001
+ *
+ * console.log(web3.utils.fromWei("1", "shannon"));
+ * > 0.000000001
+ * ```
+ */
+export const fromWei = (number: Numbers, unit: EtherUnits = 'ether'): string => {
+  const denomination = ethUnitMap[unit]
+
+  if (!denomination) {
+    throw new Error('invalid unit: ' + unit)
+  }
+
+  // value in wei would always be integer
+  // 13456789, 1234
+  const value = String(toNumber(number))
+
+  // count number of zeros in denomination
+  // 1000000 -> 6
+  const numberOfZerosInDenomination = denomination.toString().length - 1
+
+  if (numberOfZerosInDenomination <= 0) {
+    return value.toString()
+  }
+
+  // pad the value with required zeros
+  // 13456789 -> 13456789, 1234 -> 001234
+  const zeroPaddedValue = value.padStart(numberOfZerosInDenomination, '0')
+
+  // get the integer part of value by counting number of zeros from start
+  // 13456789 -> '13'
+  // 001234 -> ''
+  const integer = zeroPaddedValue.slice(0, -numberOfZerosInDenomination)
+
+  // get the fraction part of value by counting number of zeros backward
+  // 13456789 -> '456789'
+  // 001234 -> '001234'
+  const fraction = zeroPaddedValue.slice(-numberOfZerosInDenomination).replace(/\.?0+$/, '')
+
+  if (integer === '') {
+    return `0.${fraction}`
+  }
+
+  if (fraction === '') {
+    return integer
+  }
+
+  return `${integer}.${fraction}`
+}