diff --git a/src/contracts/Datatoken.ts b/src/contracts/Datatoken.ts
index efcfa47c..aaaa8da7 100644
--- a/src/contracts/Datatoken.ts
+++ b/src/contracts/Datatoken.ts
@@ -30,8 +30,11 @@ export class Datatoken extends SmartContract {
 
   /**
    * Instantiate ERC20 Datatokens
-   * @param {AbiItem | AbiItem[]} datatokensAbi
-   * @param {Web3} web3
+   * @param {Signer} signer
+   * @param {string | number} network optional network name or chain id
+   * @param {Config} config optional config object
+   * @param {AbiItem[]} abi optional abi
+   * @param {AbiItem[]} abiEnterprise optional enterprise abi
    */
   constructor(
     signer: Signer,
diff --git a/src/contracts/SmartContractWithAddress.ts b/src/contracts/SmartContractWithAddress.ts
index 2a9e78fe..48b2a836 100644
--- a/src/contracts/SmartContractWithAddress.ts
+++ b/src/contracts/SmartContractWithAddress.ts
@@ -1,9 +1,4 @@
-// import Web3 from 'web3'
-// import { Contract } from 'web3-eth-contract'
-// import { AbiItem } from 'web3-utils'
-
 import { Signer, Contract, ContractFunction } from 'ethers'
-import { Interface } from 'ethers/lib/utils'
 import { AbiItem } from '../@types'
 import { Config } from '../config'
 import { SmartContract } from './SmartContract'
diff --git a/src/utils/ContractUtils.ts b/src/utils/ContractUtils.ts
index 3e7df36d..a3c41bc4 100644
--- a/src/utils/ContractUtils.ts
+++ b/src/utils/ContractUtils.ts
@@ -72,9 +72,9 @@ export function getEventFromTx(txReceipt, eventName) {
 
 /**
  * Send the transation on chain
- * @param {string} from account that calls the function
- * @param {any} estGas estimated gas for the transaction
- * @param {Web3} web3 web3 objcet
+ * @param {BigNumber} estGas estimated gas for the transaction
+ * @param {Signer} signer signer object
+ * @param {number} gasFeeMultiplier number represinting the multiplier we apply to gas fees
  * @param {Function} functionToSend function that we need to send
  * @param {...any[]} args arguments of the function
  * @return {Promise<any>} transaction receipt
diff --git a/src/utils/DdoHelpers.ts b/src/utils/DdoHelpers.ts
index 00674e5f..dd066fc4 100644
--- a/src/utils/DdoHelpers.ts
+++ b/src/utils/DdoHelpers.ts
@@ -1,8 +1,8 @@
 import sha256 from 'crypto-js/sha256'
-import Web3 from 'web3'
+import { ethers } from 'ethers'
 
 export function generateDid(nftAddress: string, chainId: number): string {
-  nftAddress = Web3.utils.toChecksumAddress(nftAddress)
+  nftAddress = ethers.utils.getAddress(nftAddress)
   const checksum = sha256(nftAddress + chainId.toString(10))
   return `did:op:${checksum.toString()}`
 }
diff --git a/src/utils/SignatureUtils.ts b/src/utils/SignatureUtils.ts
index 3742097c..a24c6f1b 100644
--- a/src/utils/SignatureUtils.ts
+++ b/src/utils/SignatureUtils.ts
@@ -1,13 +1,19 @@
-import Web3 from 'web3'
+import { ethers, Signer, providers } from 'ethers'
 
-export async function signHash(web3: Web3, message: string, address: string) {
-  let signedMessage = await web3.eth.sign(message, address)
+export async function signHash(signer: Signer, message: string) {
+  /* Since ganache has no support yet for personal_sign, we must use the legacy implementation
+    const signedMessage = await user2.signMessage(message)
+    */
+  const messageHashBytes = ethers.utils.arrayify(message)
+  let signedMessage = await (signer as providers.JsonRpcSigner)._legacySignMessage(
+    messageHashBytes
+  )
   signedMessage = signedMessage.substr(2) // remove 0x
   const r = '0x' + signedMessage.slice(0, 64)
   const s = '0x' + signedMessage.slice(64, 128)
   let v = '0x' + signedMessage.slice(128, 130)
-  // make sure we obey 27 and 28 standards
   if (v === '0x00') v = '0x1b'
   if (v === '0x01') v = '0x1c'
+
   return { v, r, s }
 }
diff --git a/src/utils/TokenUtils.ts b/src/utils/TokenUtils.ts
index 6935e4b8..3325e179 100644
--- a/src/utils/TokenUtils.ts
+++ b/src/utils/TokenUtils.ts
@@ -3,7 +3,6 @@ import { ethers, Signer, BigNumber } from 'ethers'
 import { amountToUnits, unitsToAmount, minAbi, sendTx, LoggerInstance } from '.'
 import { Config } from '../config'
 import { ReceiptOrEstimate, ReceiptOrDecimal } from '../@types'
-// import { AbiItem } from 'web3-utils'
 
 /**
  * Approve spender to spent amount tokens
diff --git a/src/utils/minAbi.ts b/src/utils/minAbi.ts
index e9772862..a005208b 100644
--- a/src/utils/minAbi.ts
+++ b/src/utils/minAbi.ts
@@ -1,4 +1,3 @@
-// import { AbiItem } from 'web3-utils/types'
 export const minAbi = [
   {
     constant: true,
diff --git a/test/TestContractHandler.ts b/test/TestContractHandler.ts
deleted file mode 100644
index 800f8d0a..00000000
--- a/test/TestContractHandler.ts
+++ /dev/null
@@ -1,217 +0,0 @@
-import Web3 from 'web3'
-import { AbiItem } from 'web3-utils/types'
-import OPFCommunityFeeCollector from '@oceanprotocol/contracts/artifacts/contracts/communityFee/OPFCommunityFeeCollector.sol/OPFCommunityFeeCollector.json'
-import ERC20Template from '@oceanprotocol/contracts/artifacts/contracts/templates/ERC20Template.sol/ERC20Template.json'
-import ERC721Template from '@oceanprotocol/contracts/artifacts/contracts/templates/ERC721Template.sol/ERC721Template.json'
-import MockERC20 from '@oceanprotocol/contracts/artifacts/contracts/utils/mock/MockERC20Decimals.sol/MockERC20Decimals.json'
-import Router from '@oceanprotocol/contracts/artifacts/contracts/pools/FactoryRouter.sol/FactoryRouter.json'
-import FixedRate from '@oceanprotocol/contracts/artifacts/contracts/pools/fixedRate/FixedRateExchange.sol/FixedRateExchange.json'
-import Dispenser from '@oceanprotocol/contracts/artifacts/contracts/pools/dispenser/Dispenser.sol/Dispenser.json'
-import ERC721Factory from '@oceanprotocol/contracts/artifacts/contracts/ERC721Factory.sol/ERC721Factory.json'
-// delete this once removed from contracts
-import PoolTemplate from '@oceanprotocol/contracts/artifacts/contracts/pools/balancer/BPool.sol/BPool.json'
-import { getAddresses, GAS_PRICE } from './config'
-
-const estimateGasAndDeployContract = async (
-  web3: Web3,
-  abi: AbiItem | AbiItem[],
-  bytecode: string,
-  argumentsArray: any[],
-  owner: string
-) => {
-  const contract = new web3.eth.Contract(abi)
-  // get est gascost
-  const estimatedGas = await contract
-    .deploy({
-      data: bytecode,
-      arguments: argumentsArray
-    })
-    .estimateGas(function (err, estimatedGas) {
-      if (err) console.log('DeployContracts: ' + err)
-      return estimatedGas
-    })
-  // deploy the contract and get its address
-  return await contract
-    .deploy({
-      data: bytecode,
-      arguments: argumentsArray
-    })
-    .send({
-      from: owner,
-      gas: estimatedGas + 1,
-      gasPrice: GAS_PRICE
-    })
-    .then(function (contract) {
-      return contract.options.address
-    })
-}
-
-export interface Addresses {
-  opfCommunityFeeCollectorAddress: string
-  datatokenTemplateAddress: string
-  nftTemplateAddress: string
-  oceanAddress: string
-  routerAddress: string
-  sideStakingAddress: string
-  fixedRateAddress: string
-  dispenserAddress: string
-  nftFactoryAddress: string
-  daiAddress: string
-  usdcAddress: string
-  poolTemplateAddress: string
-}
-
-export const deployContracts = async (web3: Web3, owner: string): Promise<Addresses> => {
-  const addresses: Addresses = {} as Addresses
-  const configAddresses = getAddresses()
-
-  // deploy OPF free collector
-  addresses.opfCommunityFeeCollectorAddress =
-    configAddresses?.OPFCommunityFeeCollector ||
-    (await estimateGasAndDeployContract(
-      web3,
-      OPFCommunityFeeCollector.abi as AbiItem[],
-      OPFCommunityFeeCollector.bytecode,
-      [owner, owner],
-      owner
-    ))
-
-  // deploy Datatoken template
-  addresses.datatokenTemplateAddress =
-    configAddresses?.ERC20Template['1'] ||
-    (await estimateGasAndDeployContract(
-      web3,
-      ERC20Template.abi as AbiItem[],
-      ERC20Template.bytecode,
-      [],
-      owner
-    ))
-
-  // deploy NFT template
-  addresses.nftTemplateAddress =
-    configAddresses?.ERC721Template?.['1'] ||
-    (await estimateGasAndDeployContract(
-      web3,
-      ERC721Template.abi as AbiItem[],
-      ERC721Template.bytecode,
-      [],
-      owner
-    ))
-
-  // deploy OCEAN mock tocken
-  addresses.oceanAddress =
-    configAddresses?.Ocean ||
-    (await estimateGasAndDeployContract(
-      web3,
-      MockERC20.abi as AbiItem[],
-      MockERC20.bytecode,
-      ['OCEAN', 'OCEAN', 18],
-      owner
-    ))
-
-  // deploy pool template to be removed once the pools are removed from contracts
-  addresses.poolTemplateAddress =
-    configAddresses?.poolTemplate ||
-    (await estimateGasAndDeployContract(
-      web3,
-      PoolTemplate.abi as AbiItem[],
-      PoolTemplate.bytecode,
-      [],
-      owner
-    ))
-
-  // deploy router
-  addresses.routerAddress =
-    configAddresses?.Router ||
-    (await estimateGasAndDeployContract(
-      web3,
-      Router.abi as AbiItem[],
-      Router.bytecode,
-      [
-        owner,
-        addresses.oceanAddress,
-        addresses.poolTemplateAddress,
-        addresses.opfCommunityFeeCollectorAddress,
-        []
-      ],
-      owner
-    ))
-
-  // deploy fixed rate
-  addresses.fixedRateAddress =
-    configAddresses?.FixedPrice ||
-    (await estimateGasAndDeployContract(
-      web3,
-      FixedRate.abi as AbiItem[],
-      FixedRate.bytecode,
-      [addresses.routerAddress],
-      owner
-    ))
-
-  // deploy dispenser
-  addresses.dispenserAddress =
-    configAddresses?.Dispenser ||
-    (await estimateGasAndDeployContract(
-      web3,
-      Dispenser.abi as AbiItem[],
-      Dispenser.bytecode,
-      [addresses.routerAddress],
-      owner
-    ))
-
-  // deploy NFT factory
-  addresses.nftFactoryAddress =
-    configAddresses?.ERC721Factory ||
-    (await estimateGasAndDeployContract(
-      web3,
-      ERC721Factory.abi as AbiItem[],
-      ERC721Factory.bytecode,
-      [
-        addresses.nftTemplateAddress,
-        addresses.datatokenTemplateAddress,
-        addresses.routerAddress
-      ],
-      owner
-    ))
-
-  // deploy USDC mock tocken
-  addresses.usdcAddress =
-    configAddresses?.MockUSDC ||
-    (await estimateGasAndDeployContract(
-      web3,
-      MockERC20.abi as AbiItem[],
-      MockERC20.bytecode,
-      ['USDC', 'USDC', 6],
-      owner
-    ))
-
-  // deploy DAI mock tocken
-  addresses.daiAddress =
-    configAddresses?.MockDAI ||
-    (await estimateGasAndDeployContract(
-      web3,
-      MockERC20.abi as AbiItem[],
-      MockERC20.bytecode,
-      ['DAI', 'DAI', 18],
-      owner
-    ))
-
-  if (!configAddresses?.Router) {
-    const RouterContract = new web3.eth.Contract(
-      Router.abi as AbiItem[],
-      addresses.routerAddress
-    )
-
-    await RouterContract.methods
-      .addFactory(addresses.nftFactoryAddress)
-      .send({ from: owner })
-    await RouterContract.methods
-      .addFixedRateContract(addresses.fixedRateAddress)
-      .send({ from: owner })
-    await RouterContract.methods
-      .addDispenserContract(addresses.dispenserAddress)
-      .send({ from: owner })
-  }
-
-  return addresses
-}
diff --git a/test/config.ts b/test/config.ts
index af090929..628c5e3f 100644
--- a/test/config.ts
+++ b/test/config.ts
@@ -1,5 +1,4 @@
-import Web3 from 'web3'
-import { ethers, Wallet, providers, Signer } from 'ethers'
+import { providers, Signer } from 'ethers'
 import fs from 'fs'
 import { homedir } from 'os'
 import { ConfigHelper, configHelperNetworks } from '../src/config'
@@ -7,11 +6,24 @@ import { LoggerInstance, LogLevel } from '../src/utils'
 
 LoggerInstance.setLevel(LogLevel.Error)
 
+export interface Addresses {
+  opfCommunityFeeCollectorAddress: string
+  datatokenTemplateAddress: string
+  nftTemplateAddress: string
+  oceanAddress: string
+  routerAddress: string
+  sideStakingAddress: string
+  fixedRateAddress: string
+  dispenserAddress: string
+  nftFactoryAddress: string
+  daiAddress: string
+  usdcAddress: string
+  poolTemplateAddress: string
+}
+
 export const GAS_PRICE = '3000000000'
 
 // by default, we connect with development network
-export const web3 = new Web3(process.env.NODE_URI || configHelperNetworks[1].nodeUri)
-
 export const provider = new providers.JsonRpcProvider(
   process.env.NODE_URI || configHelperNetworks[1].nodeUri
 )
diff --git a/test/integration/CodeExamples.test.ts b/test/integration/CodeExamples.test.ts
index a1b6d173..39d86e03 100644
--- a/test/integration/CodeExamples.test.ts
+++ b/test/integration/CodeExamples.test.ts
@@ -23,8 +23,8 @@
 /// 3. [Install dependencies](#3-install-dependancies)
 /// 4. [Import dependencies and add variables and constants](#4-import-dependencies-and-add-variables-and-constants)
 /// 5. [Load the configuration, initialize accounts and deploy contracts](#5-load-the-configuration-initialize-accounts-and-deploy-contracts)
-/// 6. [Publish Data NFT and a Datatoken with a fixed rate exchange](#6-publish-data-nft-and-a-datatoken-with-a-fixed-rate-exchange
-/// 7. [Consume a fixed rate asset data asset, and downloads it'](#7-consume-a-fixed-rate-asset-data-asset)
+/// 6. [Publish Data NFT and a Datatoken with a fixed rate exchange](#6-publish-data-nft-and-a-datatoken-with-a-fixed-rate-exchange)
+/// 7. [Consume a fixed rate asset data asset'](#7-consume-a-fixed-rate-asset-data-asset)
 /// 8. [Publish Data NFT and a Datatoken with a dispenser](#8-publish-data-nft-and-a-datatoken-with-a-dispenserr)
 /// 9. [Consume a dispenser data asset](#9-consume-a-dispenser-data-asset)
 /// 10. [Using ERC725 Key-Value Store](#10-using-erc725-key-value-store)
diff --git a/test/unit/Datatoken.test.ts b/test/unit/Datatoken.test.ts
index 74530dc4..310f461c 100644
--- a/test/unit/Datatoken.test.ts
+++ b/test/unit/Datatoken.test.ts
@@ -526,17 +526,7 @@ describe('Datatoken', () => {
       ]
     )
 
-    // const { v, r, s } = await signHash(web3, message,user3)
-    const messageHashBytes = ethers.utils.arrayify(message)
-    let signedMessage = await (user3 as providers.JsonRpcSigner)._legacySignMessage(
-      messageHashBytes
-    )
-    signedMessage = signedMessage.substr(2) // remove 0x
-    const r = '0x' + signedMessage.slice(0, 64)
-    const s = '0x' + signedMessage.slice(64, 128)
-    let v = '0x' + signedMessage.slice(128, 130)
-    if (v === '0x00') v = '0x1b'
-    if (v === '0x01') v = '0x1c'
+    const { v, r, s } = await signHash(user3, message)
 
     const providerFees: ProviderFees = {
       providerFeeAddress: await user3.getAddress(),
@@ -586,16 +576,7 @@ describe('Datatoken', () => {
       ]
     )
 
-    const messageHashBytes = ethers.utils.arrayify(message)
-    let signedMessage = await (user3 as providers.JsonRpcSigner)._legacySignMessage(
-      messageHashBytes
-    )
-    signedMessage = signedMessage.substr(2) // remove 0x
-    const r = '0x' + signedMessage.slice(0, 64)
-    const s = '0x' + signedMessage.slice(64, 128)
-    let v = '0x' + signedMessage.slice(128, 130)
-    if (v === '0x00') v = '0x1b'
-    if (v === '0x01') v = '0x1c'
+    const { v, r, s } = await signHash(user3, message)
 
     const providerFees: ProviderFees = {
       providerFeeAddress: await user3.getAddress(),
@@ -641,16 +622,8 @@ describe('Datatoken', () => {
         providerValidUntil
       ]
     )
-    const messageHashBytes = ethers.utils.arrayify(message)
-    let signedMessage = await (user3 as providers.JsonRpcSigner)._legacySignMessage(
-      messageHashBytes
-    )
-    signedMessage = signedMessage.substr(2) // remove 0x
-    const r = '0x' + signedMessage.slice(0, 64)
-    const s = '0x' + signedMessage.slice(64, 128)
-    let v = '0x' + signedMessage.slice(128, 130)
-    if (v === '0x00') v = '0x1b'
-    if (v === '0x01') v = '0x1c'
+
+    const { v, r, s } = await signHash(user3, message)
 
     const providerFees: ProviderFees = {
       providerFeeAddress: await user3.getAddress(),
@@ -698,16 +671,8 @@ describe('Datatoken', () => {
         providerValidUntil
       ]
     )
-    const messageHashBytes = ethers.utils.arrayify(message)
-    let signedMessage = await (user3 as providers.JsonRpcSigner)._legacySignMessage(
-      messageHashBytes
-    )
-    signedMessage = signedMessage.substr(2) // remove 0x
-    const r = '0x' + signedMessage.slice(0, 64)
-    const s = '0x' + signedMessage.slice(64, 128)
-    let v = '0x' + signedMessage.slice(128, 130)
-    if (v === '0x00') v = '0x1b'
-    if (v === '0x01') v = '0x1c'
+
+    const { v, r, s } = await signHash(user3, message)
 
     const providerFees: ProviderFees = {
       providerFeeAddress: await user1.getAddress(),
diff --git a/test/unit/Nft.test.ts b/test/unit/Nft.test.ts
index 49e74ed7..f902cd79 100644
--- a/test/unit/Nft.test.ts
+++ b/test/unit/Nft.test.ts
@@ -1,5 +1,4 @@
 import { assert } from 'chai'
-import { deployContracts, Addresses } from '../TestContractHandler'
 import sha256 from 'crypto-js/sha256'
 import { ethers, Signer } from 'ethers'
 import { getAddresses, getTestConfig, provider } from '../config'
diff --git a/test/unit/NftFactory.test.ts b/test/unit/NftFactory.test.ts
index fad181e2..2ec032da 100644
--- a/test/unit/NftFactory.test.ts
+++ b/test/unit/NftFactory.test.ts
@@ -253,25 +253,8 @@ describe('Nft Factory test', () => {
         providerValidUntil
       ]
     )
-    /* Since ganache has no support yet for personal_sign, we must use the legacy implementation
-    const signedMessage = await user2.signMessage(message)
-    */
-    // const signedMessage = await (user2 as providers.JsonRpcSigner)._legacySignMessage(
-    // message
-    // )
-    // console.log(signedMessage)
 
-    // const { v, r, s } = await signHash(web3, message, consumeFeeAddress)
-    const messageHashBytes = ethers.utils.arrayify(message)
-    let signedMessage = await (
-      consumeFeeAddress as providers.JsonRpcSigner
-    )._legacySignMessage(messageHashBytes)
-    signedMessage = signedMessage.substr(2) // remove 0x
-    const r = '0x' + signedMessage.slice(0, 64)
-    const s = '0x' + signedMessage.slice(64, 128)
-    let v = '0x' + signedMessage.slice(128, 130)
-    if (v === '0x00') v = '0x1b'
-    if (v === '0x01') v = '0x1c'
+    const { v, r, s } = await signHash(consumeFeeAddress, message)
 
     const providerFees: ProviderFees = {
       providerFeeAddress: await consumeFeeAddress.getAddress(),