diff --git a/src/chain/ERC20Reactor.ts b/src/chain/ERC20Reactor.ts
index 1edd5cd..bc3bc49 100644
--- a/src/chain/ERC20Reactor.ts
+++ b/src/chain/ERC20Reactor.ts
@@ -3,6 +3,8 @@ import Web3 from 'web3'
 
 import { Contract } from 'web3-eth-contract'
 import { Account } from 'web3-core'
+import { AllChains } from './allchain'
+import { HttpRetryProvider } from './HttpRetryProvider'
 
 const abiFt = require('abis/ERC20.json').abi
 export class ERC20Reactor {
@@ -114,6 +116,7 @@ export class ERC20Reactor {
     to,
     amount,
     account,
+    chain,
     gas,
     encodeABI = false,
     estimate = false,
@@ -122,13 +125,22 @@ export class ERC20Reactor {
     from?: string
     to: string
     account?: string
+    chain?: number
     amount: number | string
     gas?: number
     encodeABI?: boolean
     estimate?: boolean
   }) {
     from = from || account || this.account.address
-    const contract = new this.web3.eth.Contract(abiFt, address, { from: account || this.account.address })
+    let w3 = this.web3
+    if (chain) {
+      let chainData = AllChains.find(o => o.id === chain)
+      if (chainData) {
+        const provider = new HttpRetryProvider(chainData.rpc.split('|'))
+        w3 = new Web3(provider)
+      }
+    }
+    const contract = new w3.eth.Contract(abiFt, address, { from: account || this.account.address })
     const amountBN = Web3.utils.toBN(Web3.utils.toWei(amount + ''))
     if (encodeABI) {
       return contract.methods.transferFrom(from, to, amountBN).encodeABI()
@@ -146,16 +158,26 @@ export class ERC20Reactor {
     to,
     amount,
     account,
+    chain,
     encodeABI = false,
   }: {
     account?: string
     address?: string
     to: string
     amount: string
+    chain?: number
     encodeABI: boolean
   }) {
+    let w3 = this.web3
+    if (chain) {
+      let chainData = AllChains.find(o => o.id === chain)
+      if (chainData) {
+        const provider = new HttpRetryProvider(chainData.rpc.split('|'))
+        w3 = new Web3(provider)
+      }
+    }
     const contract = address
-      ? new this.web3.eth.Contract(abiFt, address, { from: account || this.account.address })
+      ? new w3.eth.Contract(abiFt, address, { from: account || this.account.address })
       : this.contract
     let amountBN = Web3.utils.toBN(Web3.utils.toWei(amount + ''))
     if (encodeABI) {
diff --git a/src/chain/ERC721Reactor.ts b/src/chain/ERC721Reactor.ts
index b101722..bb6446b 100644
--- a/src/chain/ERC721Reactor.ts
+++ b/src/chain/ERC721Reactor.ts
@@ -3,6 +3,8 @@ import { getFormattedIpfsUrl } from 'utils/wallet.util'
 import Web3 from 'web3'
 import { Contract } from 'web3-eth-contract'
 import { Account } from 'web3-core'
+import { AllChains } from './allchain'
+import { HttpRetryProvider } from './HttpRetryProvider'
 
 export const ERC721 = 'ERC721'
 export const ERC721_INTERFACE_ID = '0x80ac58cd'
@@ -299,6 +301,7 @@ export class ERC721Reactor {
     to,
     tokenId,
     account,
+    chain,
     gas,
     encodeABI = false,
   }: {
@@ -307,11 +310,20 @@ export class ERC721Reactor {
     to: string
     tokenId: string
     account?: string
+    chain?: number
     gas?: number
     encodeABI?: boolean
   }) {
+    let w3 = this.web3
+    if (chain) {
+      let chainData = AllChains.find(o => o.id === chain)
+      if (chainData) {
+        const provider = new HttpRetryProvider(chainData.rpc.split('|'))
+        w3 = new Web3(provider)
+      }
+    }
     const contract = address
-      ? new this.web3.eth.Contract(abiNft, address, { from: account || this.account.address })
+      ? new w3.eth.Contract(abiNft, address, { from: account || this.account.address })
       : this.contract
     if (encodeABI) {
       return contract.methods.safeTransferFrom(from, to, tokenId).encodeABI()
@@ -326,16 +338,24 @@ export class ERC721Reactor {
     address,
     to,
     tokenId,
+    chain,
     encodeABI = false,
   }: {
     address?: string
     to: string
     tokenId: string
+    chain?: number
     encodeABI?: boolean
   }) {
-    const contract = address
-      ? new this.web3.eth.Contract(abiNft, address, { from: this.account.address })
-      : this.contract
+    let w3 = this.web3
+    if (chain) {
+      let chainData = AllChains.find(o => o.id === chain)
+      if (chainData) {
+        const provider = new HttpRetryProvider(chainData.rpc.split('|'))
+        w3 = new Web3(provider)
+      }
+    }
+    const contract = address ? new w3.eth.Contract(abiNft, address, { from: this.account.address }) : this.contract
     if (encodeABI) {
       return contract.methods.mint(to, tokenId).encodeABI()
     }
@@ -348,16 +368,26 @@ export class ERC721Reactor {
     address,
     to,
     tokenIds,
+    chain,
     encodeABI = false,
   }: {
     account?: string
     address?: string
     to: string
     tokenIds: string[]
+    chain?: number
     encodeABI?: boolean
   }) {
+    let w3 = this.web3
+    if (chain) {
+      let chainData = AllChains.find(o => o.id === chain)
+      if (chainData) {
+        const provider = new HttpRetryProvider(chainData.rpc.split('|'))
+        w3 = new Web3(provider)
+      }
+    }
     const contract = address
-      ? new this.web3.eth.Contract(abiNft, address, { from: account || this.account.address })
+      ? new w3.eth.Contract(abiNft, address, { from: account || this.account.address })
       : this.contract
     // let gas = await contract.methods.batchMint(to, tokenIds, configIds).estimateGas({ gas: 1000000 })
     if (encodeABI) {