diff --git a/oracle/Dockerfile b/oracle/Dockerfile
index f152ec61..44a2e2f8 100644
--- a/oracle/Dockerfile
+++ b/oracle/Dockerfile
@@ -10,6 +10,7 @@ RUN apt-get clean
 WORKDIR /mono
 COPY package.json .
 COPY contracts/package.json ./contracts/
+COPY commons/package.json ./commons/
 COPY oracle/package.json ./oracle/
 COPY yarn.lock .
 RUN yarn install --production --frozen-lockfile
@@ -18,6 +19,8 @@ COPY ./contracts ./contracts
 RUN yarn run compile:contracts
 RUN mv ./contracts/build ./ && rm -rf ./contracts/* ./contracts/.[!.]* && mv ./build ./contracts/
 
+COPY ./commons ./commons
+
 COPY ./oracle ./oracle
 WORKDIR /mono/oracle
 CMD echo "To start a bridge process run:" \
diff --git a/oracle/config/affirmation-request-watcher.config.js b/oracle/config/affirmation-request-watcher.config.js
index 1acd26b6..f93fc8c4 100644
--- a/oracle/config/affirmation-request-watcher.config.js
+++ b/oracle/config/affirmation-request-watcher.config.js
@@ -1,5 +1,5 @@
 const baseConfig = require('./base.config')
-const erc20Abi = require('../../contracts/build/contracts/ERC20').abi
+const { ERC20_ABI } = require('../../commons')
 const { ERC_TYPES } = require('../src/utils/constants')
 
 const initialChecksJson = process.argv[3]
@@ -29,7 +29,7 @@ module.exports =
         ...baseConfig.foreignConfig,
         event: 'Transfer',
         eventContractAddress: process.env.ERC20_TOKEN_ADDRESS,
-        eventAbi: erc20Abi,
+        eventAbi: ERC20_ABI,
         eventFilter: { to: process.env.FOREIGN_BRIDGE_ADDRESS },
         queue: 'home',
         name: `watcher-${id}`,
diff --git a/oracle/config/base.config.js b/oracle/config/base.config.js
index 089c6c45..898ca64b 100644
--- a/oracle/config/base.config.js
+++ b/oracle/config/base.config.js
@@ -1,19 +1,18 @@
 require('../env')
 
 const { toBN } = require('web3').utils
+const {
+  BRIDGE_MODES,
+  HOME_NATIVE_TO_ERC_ABI,
+  FOREIGN_NATIVE_TO_ERC_ABI,
+  HOME_ERC_TO_ERC_ABI,
+  FOREIGN_ERC_TO_ERC_ABI,
+  HOME_ERC_TO_NATIVE_ABI,
+  FOREIGN_ERC_TO_NATIVE_ABI
+} = require('../../commons')
 const { web3Home, web3Foreign } = require('../src/services/web3')
 const { privateKeyToAddress } = require('../src/utils/utils')
 
-const homeNativeErcAbi = require('../../contracts/build/contracts/HomeBridgeNativeToErc').abi
-const foreignNativeErcAbi = require('../../contracts/build/contracts/ForeignBridgeNativeToErc').abi
-
-const homeErcErcAbi = require('../../contracts/build/contracts/HomeBridgeErcToErc').abi
-const foreignErc677Erc677Abi = require('../../contracts/build/contracts/ForeignBridgeErc677ToErc677')
-  .abi
-
-const homeErcNativeAbi = require('../../contracts/build/contracts/HomeBridgeErcToNative').abi
-const foreignErcNativeAbi = require('../../contracts/build/contracts/ForeignBridgeErcToNative').abi
-
 const { VALIDATOR_ADDRESS, VALIDATOR_ADDRESS_PRIVATE_KEY } = process.env
 
 let homeAbi
@@ -21,27 +20,27 @@ let foreignAbi
 let id
 
 switch (process.env.BRIDGE_MODE) {
-  case 'NATIVE_TO_ERC':
-    homeAbi = homeNativeErcAbi
-    foreignAbi = foreignNativeErcAbi
+  case BRIDGE_MODES.NATIVE_TO_ERC:
+    homeAbi = HOME_NATIVE_TO_ERC_ABI
+    foreignAbi = FOREIGN_NATIVE_TO_ERC_ABI
     id = 'native-erc'
     break
-  case 'ERC_TO_ERC':
-    homeAbi = homeErcErcAbi
-    foreignAbi = foreignErc677Erc677Abi
+  case BRIDGE_MODES.ERC_TO_ERC:
+    homeAbi = HOME_ERC_TO_ERC_ABI
+    foreignAbi = FOREIGN_ERC_TO_ERC_ABI
     id = 'erc-erc'
     break
-  case 'ERC_TO_NATIVE':
-    homeAbi = homeErcNativeAbi
-    foreignAbi = foreignErcNativeAbi
+  case BRIDGE_MODES.ERC_TO_NATIVE:
+    homeAbi = HOME_ERC_TO_NATIVE_ABI
+    foreignAbi = FOREIGN_ERC_TO_NATIVE_ABI
     id = 'erc-native'
     break
   default:
     if (process.env.NODE_ENV !== 'test') {
       throw new Error(`Bridge Mode: ${process.env.BRIDGE_MODE} not supported.`)
     } else {
-      homeAbi = homeErcNativeAbi
-      foreignAbi = foreignErcNativeAbi
+      homeAbi = HOME_ERC_TO_NATIVE_ABI
+      foreignAbi = FOREIGN_ERC_TO_NATIVE_ABI
       id = 'erc-native'
     }
 }
diff --git a/oracle/scripts/erc20_to_erc20/sendForeign.js b/oracle/scripts/erc20_to_erc20/sendForeign.js
index d292f8d3..27f55c39 100644
--- a/oracle/scripts/erc20_to_erc20/sendForeign.js
+++ b/oracle/scripts/erc20_to_erc20/sendForeign.js
@@ -3,6 +3,7 @@ const Web3 = require('web3')
 const Web3Utils = require('web3-utils')
 const rpcUrlsManager = require('../../src/services/getRpcUrlsManager')
 const { sendTx, sendRawTx } = require('../../src/tx/sendTx')
+const { ERC20_ABI } = require('../../../commons')
 
 const {
   USER_ADDRESS,
@@ -14,15 +15,14 @@ const {
 
 const NUMBER_OF_DEPOSITS_TO_SEND = process.argv[2] || process.env.NUMBER_OF_DEPOSITS_TO_SEND || 1
 
-const ERC20_ABI = require('../../../contracts/build/contracts/ERC20').abi
-const BRIDGE_ABI = require('../../../contracts/build/contracts/ForeignBridgeErcToErc').abi
+const { FOREIGN_ERC_TO_ERC_ABI } = require('../../../commons')
 
 const foreignRpcUrl = rpcUrlsManager.foreignUrls[0]
 const foreignProvider = new Web3.providers.HttpProvider(foreignRpcUrl)
 const web3Foreign = new Web3(foreignProvider)
 
 async function main() {
-  const bridge = new web3Foreign.eth.Contract(BRIDGE_ABI, FOREIGN_BRIDGE_ADDRESS)
+  const bridge = new web3Foreign.eth.Contract(FOREIGN_ERC_TO_ERC_ABI, FOREIGN_BRIDGE_ADDRESS)
   const ERC20_TOKEN_ADDRESS = await bridge.methods.erc20token().call()
   const poa20 = new web3Foreign.eth.Contract(ERC20_ABI, ERC20_TOKEN_ADDRESS)
 
diff --git a/oracle/scripts/erc20_to_erc20/sendHome.js b/oracle/scripts/erc20_to_erc20/sendHome.js
index bc89fb93..cdbf2ebb 100644
--- a/oracle/scripts/erc20_to_erc20/sendHome.js
+++ b/oracle/scripts/erc20_to_erc20/sendHome.js
@@ -4,6 +4,7 @@ const Web3Utils = require('web3-utils')
 const rpcUrlsManager = require('../../src/services/getRpcUrlsManager')
 const { sendTx, sendRawTx } = require('../../src/tx/sendTx')
 const { isValidAmount } = require('../utils/utils')
+const { HOME_ERC_TO_ERC_ABI } = require('../../../commons')
 
 const {
   USER_ADDRESS,
@@ -46,14 +47,12 @@ const BRIDGEABLE_TOKEN_ABI = [
   }
 ]
 
-const BRIDGE_ABI = require('../../../contracts/build/contracts/HomeBridgeErcToErc').abi
-
 const homeRpcUrl = rpcUrlsManager.homeUrls[0]
 const homeProvider = new Web3.providers.HttpProvider(homeRpcUrl)
 const web3Home = new Web3(homeProvider)
 
 async function main() {
-  const bridge = new web3Home.eth.Contract(BRIDGE_ABI, HOME_BRIDGE_ADDRESS)
+  const bridge = new web3Home.eth.Contract(HOME_ERC_TO_ERC_ABI, HOME_BRIDGE_ADDRESS)
   const BRIDGEABLE_TOKEN_ADDRESS = await bridge.methods.erc677token().call()
   const erc677 = new web3Home.eth.Contract(BRIDGEABLE_TOKEN_ABI, BRIDGEABLE_TOKEN_ADDRESS)
 
diff --git a/oracle/scripts/erc20_to_native/sendForeign.js b/oracle/scripts/erc20_to_native/sendForeign.js
index 0b728322..a0213b57 100644
--- a/oracle/scripts/erc20_to_native/sendForeign.js
+++ b/oracle/scripts/erc20_to_native/sendForeign.js
@@ -14,15 +14,14 @@ const {
 
 const NUMBER_OF_DEPOSITS_TO_SEND = process.argv[2] || process.env.NUMBER_OF_DEPOSITS_TO_SEND || 1
 
-const ERC20_ABI = require('../../../contracts/build/contracts/ERC20').abi
-const BRIDGE_ABI = require('../../../contracts/build/contracts/ForeignBridgeErcToNative').abi
+const { ERC20_ABI, FOREIGN_ERC_TO_NATIVE_ABI } = require('../../../commons')
 
 const foreignRpcUrl = rpcUrlsManager.foreignUrls[0]
 const foreignProvider = new Web3.providers.HttpProvider(foreignRpcUrl)
 const web3Foreign = new Web3(foreignProvider)
 
 async function main() {
-  const bridge = new web3Foreign.eth.Contract(BRIDGE_ABI, FOREIGN_BRIDGE_ADDRESS)
+  const bridge = new web3Foreign.eth.Contract(FOREIGN_ERC_TO_NATIVE_ABI, FOREIGN_BRIDGE_ADDRESS)
   const ERC20_TOKEN_ADDRESS = await bridge.methods.erc20token().call()
   const poa20 = new web3Foreign.eth.Contract(ERC20_ABI, ERC20_TOKEN_ADDRESS)
 
diff --git a/oracle/scripts/erc20_to_native/sendHome.js b/oracle/scripts/erc20_to_native/sendHome.js
index 530c6a8c..68d6b21e 100644
--- a/oracle/scripts/erc20_to_native/sendHome.js
+++ b/oracle/scripts/erc20_to_native/sendHome.js
@@ -3,7 +3,7 @@ const Web3Utils = require('web3-utils')
 const { web3Home } = require('../../src/services/web3')
 const { sendTx, sendRawTx } = require('../../src/tx/sendTx')
 const { isValidAmount } = require('../utils/utils')
-const BRIDGE_ABI = require('../../../contracts/build/contracts/HomeBridgeErcToNative').abi
+const { HOME_ERC_TO_NATIVE_ABI } = require('../../../commons')
 
 const {
   USER_ADDRESS,
@@ -16,7 +16,7 @@ const {
 const NUMBER_OF_DEPOSITS_TO_SEND = process.argv[2] || 1
 
 async function main() {
-  const bridge = new web3Home.eth.Contract(BRIDGE_ABI, HOME_BRIDGE_ADDRESS)
+  const bridge = new web3Home.eth.Contract(HOME_ERC_TO_NATIVE_ABI, HOME_BRIDGE_ADDRESS)
 
   try {
     await isValidAmount(HOME_MIN_AMOUNT_PER_TX, bridge)
diff --git a/oracle/scripts/getValidatorStartBlocks.js b/oracle/scripts/getValidatorStartBlocks.js
index 8d97ddb4..7bf48b70 100644
--- a/oracle/scripts/getValidatorStartBlocks.js
+++ b/oracle/scripts/getValidatorStartBlocks.js
@@ -1,9 +1,8 @@
 require('../env')
 const Web3 = require('web3')
-const bridgeValidatorsABI = require('../../contracts/build/contracts/BridgeValidators').abi
 
+const { BRIDGE_VALIDATORS_ABI } = require('../../commons')
 const rpcUrlsManager = require('../src/services/getRpcUrlsManager')
-
 const { bridgeConfig } = require('../config/base.config')
 
 const homeABI = bridgeConfig.homeBridgeAbi
@@ -19,7 +18,7 @@ async function getStartBlock(rpcUrl, bridgeAddress, bridgeAbi) {
 
     const validatorContractAddress = await bridgeContract.methods.validatorContract().call()
     const validatorContract = new web3Instance.eth.Contract(
-      bridgeValidatorsABI,
+      BRIDGE_VALIDATORS_ABI,
       validatorContractAddress
     )
 
diff --git a/oracle/scripts/initialChecks.js b/oracle/scripts/initialChecks.js
index 741c0de2..94d7e71f 100644
--- a/oracle/scripts/initialChecks.js
+++ b/oracle/scripts/initialChecks.js
@@ -1,6 +1,6 @@
 require('../env')
 const Web3 = require('web3')
-const ERC677BridgeTokenABI = require('../../contracts/build/contracts/ERC677BridgeToken').abi
+const { ERC677_BRIDGE_TOKEN_ABI } = require('../../commons')
 const { ERC_TYPES } = require('../src/utils/constants')
 
 async function initialChecks() {
@@ -9,7 +9,7 @@ async function initialChecks() {
 
   if (BRIDGE_MODE === 'ERC_TO_ERC') {
     const foreignWeb3 = new Web3(new Web3.providers.HttpProvider(FOREIGN_RPC_URL))
-    const tokenContract = new foreignWeb3.eth.Contract(ERC677BridgeTokenABI, ERC20_TOKEN_ADDRESS)
+    const tokenContract = new foreignWeb3.eth.Contract(ERC677_BRIDGE_TOKEN_ABI, ERC20_TOKEN_ADDRESS)
     try {
       const bridgeContract = await tokenContract.methods.bridgeContract().call()
       if (bridgeContract === FOREIGN_BRIDGE_ADDRESS) {
diff --git a/oracle/scripts/native_to_erc20/sendForeign.js b/oracle/scripts/native_to_erc20/sendForeign.js
index 56d773ab..14d95143 100644
--- a/oracle/scripts/native_to_erc20/sendForeign.js
+++ b/oracle/scripts/native_to_erc20/sendForeign.js
@@ -3,6 +3,7 @@ const Web3Utils = require('web3-utils')
 const { web3Foreign } = require('../../src/services/web3')
 const { sendTx, sendRawTx } = require('../../src/tx/sendTx')
 const { isValidAmount } = require('../utils/utils')
+const { FOREIGN_NATIVE_TO_ERC_ABI } = require('../../../commons')
 
 const {
   USER_ADDRESS,
@@ -44,10 +45,9 @@ const ERC677_ABI = [
     type: 'function'
   }
 ]
-const BRIDGE_ABI = require('../../../contracts/build/contracts/ForeignBridgeNativeToErc').abi
 
 async function main() {
-  const bridge = new web3Foreign.eth.Contract(BRIDGE_ABI, FOREIGN_BRIDGE_ADDRESS)
+  const bridge = new web3Foreign.eth.Contract(FOREIGN_NATIVE_TO_ERC_ABI, FOREIGN_BRIDGE_ADDRESS)
   const ERC20_TOKEN_ADDRESS = await bridge.methods.erc677token().call()
   const poa20 = new web3Foreign.eth.Contract(ERC677_ABI, ERC20_TOKEN_ADDRESS)
 
diff --git a/oracle/scripts/native_to_erc20/sendHome.js b/oracle/scripts/native_to_erc20/sendHome.js
index 6f02747b..439fb1b1 100644
--- a/oracle/scripts/native_to_erc20/sendHome.js
+++ b/oracle/scripts/native_to_erc20/sendHome.js
@@ -3,7 +3,7 @@ const Web3Utils = require('web3-utils')
 const { web3Home } = require('../../src/services/web3')
 const { sendTx, sendRawTx } = require('../../src/tx/sendTx')
 const { isValidAmount } = require('../utils/utils')
-const BRIDGE_ABI = require('../../../contracts/build/contracts/HomeBridgeNativeToErc').abi
+const { HOME_NATIVE_TO_ERC_ABI } = require('../../../commons')
 
 const {
   USER_ADDRESS,
@@ -16,7 +16,7 @@ const {
 const NUMBER_OF_DEPOSITS_TO_SEND = process.argv[2] || 1
 
 async function main() {
-  const bridge = new web3Home.eth.Contract(BRIDGE_ABI, HOME_BRIDGE_ADDRESS)
+  const bridge = new web3Home.eth.Contract(HOME_NATIVE_TO_ERC_ABI, HOME_BRIDGE_ADDRESS)
 
   try {
     await isValidAmount(HOME_MIN_AMOUNT_PER_TX, bridge)
diff --git a/oracle/src/events/processAffirmationRequests/index.js b/oracle/src/events/processAffirmationRequests/index.js
index 09996c6f..57d36a0d 100644
--- a/oracle/src/events/processAffirmationRequests/index.js
+++ b/oracle/src/events/processAffirmationRequests/index.js
@@ -4,7 +4,7 @@ const { HttpListProviderError } = require('http-list-provider')
 const rootLogger = require('../../services/logger')
 const { web3Home } = require('../../services/web3')
 
-const bridgeValidatorsABI = require('../../../../contracts/build/contracts/BridgeValidators').abi
+const { BRIDGE_VALIDATORS_ABI } = require('../../../../commons')
 const { EXIT_CODES, MAX_CONCURRENT_EVENTS } = require('../../utils/constants')
 const estimateGas = require('./estimateGas')
 const {
@@ -28,7 +28,7 @@ function processAffirmationRequestsBuilder(config) {
       const validatorContractAddress = await homeBridge.methods.validatorContract().call()
       rootLogger.debug({ validatorContractAddress }, 'Validator contract address obtained')
 
-      validatorContract = new web3Home.eth.Contract(bridgeValidatorsABI, validatorContractAddress)
+      validatorContract = new web3Home.eth.Contract(BRIDGE_VALIDATORS_ABI, validatorContractAddress)
     }
 
     rootLogger.debug(`Processing ${affirmationRequests.length} AffirmationRequest events`)
diff --git a/oracle/src/events/processCollectedSignatures/index.js b/oracle/src/events/processCollectedSignatures/index.js
index db83a20b..288f57f3 100644
--- a/oracle/src/events/processCollectedSignatures/index.js
+++ b/oracle/src/events/processCollectedSignatures/index.js
@@ -1,7 +1,7 @@
 require('../../../env')
 const promiseLimit = require('promise-limit')
 const { HttpListProviderError } = require('http-list-provider')
-const bridgeValidatorsABI = require('../../../../contracts/build/contracts/BridgeValidators').abi
+const { BRIDGE_VALIDATORS_ABI } = require('../../../../commons')
 const rootLogger = require('../../services/logger')
 const { web3Home, web3Foreign } = require('../../services/web3')
 const { signatureToVRS } = require('../../utils/message')
@@ -34,7 +34,7 @@ function processCollectedSignaturesBuilder(config) {
       rootLogger.debug({ validatorContractAddress }, 'Validator contract address obtained')
 
       validatorContract = new web3Foreign.eth.Contract(
-        bridgeValidatorsABI,
+        BRIDGE_VALIDATORS_ABI,
         validatorContractAddress
       )
     }
diff --git a/oracle/src/events/processSignatureRequests/index.js b/oracle/src/events/processSignatureRequests/index.js
index 309a810a..a90f9da6 100644
--- a/oracle/src/events/processSignatureRequests/index.js
+++ b/oracle/src/events/processSignatureRequests/index.js
@@ -1,7 +1,7 @@
 require('../../../env')
 const promiseLimit = require('promise-limit')
 const { HttpListProviderError } = require('http-list-provider')
-const bridgeValidatorsABI = require('../../../../contracts/build/contracts/BridgeValidators').abi
+const { BRIDGE_VALIDATORS_ABI } = require('../../../../commons')
 const rootLogger = require('../../services/logger')
 const { web3Home } = require('../../services/web3')
 const { createMessage } = require('../../utils/message')
@@ -35,7 +35,7 @@ function processSignatureRequestsBuilder(config) {
       const validatorContractAddress = await homeBridge.methods.validatorContract().call()
       rootLogger.debug({ validatorContractAddress }, 'Validator contract address obtained')
 
-      validatorContract = new web3Home.eth.Contract(bridgeValidatorsABI, validatorContractAddress)
+      validatorContract = new web3Home.eth.Contract(BRIDGE_VALIDATORS_ABI, validatorContractAddress)
     }
 
     rootLogger.debug(`Processing ${signatureRequests.length} SignatureRequest events`)
diff --git a/oracle/src/events/processTransfers/index.js b/oracle/src/events/processTransfers/index.js
index 4ac75608..3354fecb 100644
--- a/oracle/src/events/processTransfers/index.js
+++ b/oracle/src/events/processTransfers/index.js
@@ -1,7 +1,7 @@
 require('../../../env')
 const promiseLimit = require('promise-limit')
 const { HttpListProviderError } = require('http-list-provider')
-const bridgeValidatorsABI = require('../../../../contracts/build/contracts/BridgeValidators').abi
+const { BRIDGE_VALIDATORS_ABI } = require('../../../../commons')
 const rootLogger = require('../../services/logger')
 const { web3Home } = require('../../services/web3')
 const {
@@ -27,7 +27,7 @@ function processTransfersBuilder(config) {
       const validatorContractAddress = await homeBridge.methods.validatorContract().call()
       rootLogger.debug({ validatorContractAddress }, 'Validator contract address obtained')
 
-      validatorContract = new web3Home.eth.Contract(bridgeValidatorsABI, validatorContractAddress)
+      validatorContract = new web3Home.eth.Contract(BRIDGE_VALIDATORS_ABI, validatorContractAddress)
     }
 
     rootLogger.debug(`Processing ${transfers.length} Transfer events`)