diff --git a/src/App.js b/src/App.js
index 2eb9ad7..a0b4694 100644
--- a/src/App.js
+++ b/src/App.js
@@ -43,14 +43,10 @@ class App extends Component {
     this.setIsValidVotingKey.call(this)
   }
   async setMetadata() {
-    const currentData = await this.getMetadataContract().getValidatorData({
-      votingKey: this.getVotingKey()
-    })
+    const currentData = await this.getMetadataContract().getValidatorData(this.getMiningKey())
     const hasData = currentData.postal_code ? true : false
     this.defaultValues = currentData
-    const pendingChange = await this.getMetadataContract().getPendingChange({
-      votingKey: this.getVotingKey()
-    })
+    const pendingChange = await this.getMetadataContract().getPendingChange(this.getMiningKey())
     if (Number(pendingChange.minThreshold) > 0) {
       var msg = `
         First Name: <b>${pendingChange.firstName}</b> <br/>
@@ -91,6 +87,9 @@ class App extends Component {
   getVotingKey() {
     return this.props.web3Config.votingKey
   }
+  getMiningKey() {
+    return this.props.web3Config.miningKey
+  }
   checkValidation() {
     const isAfter = moment(this.state.form.expirationDate).isAfter(moment())
     let keys = Object.keys(this.state.form)
diff --git a/src/contracts/KeysManager.contract.js b/src/contracts/KeysManager.contract.js
index 2cf45ba..32d2674 100644
--- a/src/contracts/KeysManager.contract.js
+++ b/src/contracts/KeysManager.contract.js
@@ -15,4 +15,7 @@ export default class KeysManager {
   async isVotingActive(votingKey) {
     return await this.keysInstance.methods.isVotingActive(votingKey).call()
   }
+  async miningKeyByVoting(votingKey) {
+    return await this.keysInstance.methods.miningKeyByVoting(votingKey).call()
+  }
 }
diff --git a/src/contracts/Metadata.contract.js b/src/contracts/Metadata.contract.js
index 8388316..ef42b16 100644
--- a/src/contracts/Metadata.contract.js
+++ b/src/contracts/Metadata.contract.js
@@ -77,8 +77,7 @@ export default class Metadata {
     }
   }
 
-  async getValidatorData({ votingKey, miningKey }) {
-    miningKey = miningKey || (await this.getMiningByVoting(votingKey))
+  async getValidatorData(miningKey) {
     if (!miningKey) {
       helpersGlobal.generateAlert('warning', 'Warning!', messages.invalidaVotingKey)
       return {}
@@ -102,16 +101,6 @@ export default class Metadata {
     }
   }
 
-  async getMiningByVoting(votingKey) {
-    let miningKey
-    try {
-      miningKey = await this.metadataInstance.methods.getMiningByVotingKey(votingKey).call()
-    } catch (e) {
-      console.log(e.message)
-    }
-    return miningKey
-  }
-
   async getAllValidatorsData(netId) {
     let all = []
     return new Promise(async (resolve, reject) => {
@@ -125,7 +114,7 @@ export default class Metadata {
           }
           data = this.getMocData()
         } else {
-          data = await this.getValidatorData({ miningKey: key })
+          data = await this.getValidatorData(key)
         }
         data.address = key
         all.push(data)
@@ -134,8 +123,7 @@ export default class Metadata {
     })
   }
 
-  async getPendingChange({ votingKey, miningKey }) {
-    miningKey = miningKey || (await this.getMiningByVoting(votingKey))
+  async getPendingChange(miningKey) {
     if (!miningKey) {
       helpersGlobal.generateAlert('warning', 'Warning!', messages.invalidaVotingKey)
       return {}
@@ -163,7 +151,7 @@ export default class Metadata {
   async getAllPendingChanges() {
     let pendingChanges = []
     for (let key of this.miningKeys) {
-      let pendingChange = await this.getPendingChange({ miningKey: key })
+      let pendingChange = await this.getPendingChange(key)
       pendingChange.address = key
       if (pendingChange.postal_code) {
         pendingChanges.push(pendingChange)
@@ -172,18 +160,24 @@ export default class Metadata {
     return pendingChanges
   }
 
-  async confirmPendingChange({ miningKeyToConfirm, senderVotingKey }) {
-    let alreadyConfirmed = await this.metadataInstance.methods
-      .isAddressAlreadyVoted(miningKeyToConfirm, senderVotingKey)
-      .call()
+  async confirmPendingChange({ miningKeyToConfirm, senderVotingKey, senderMiningKey }) {
+    let alreadyConfirmed
+    if (this.metadataInstance.methods.isValidatorAlreadyVoted) {
+      alreadyConfirmed = await this.metadataInstance.methods
+        .isValidatorAlreadyVoted(miningKeyToConfirm, senderMiningKey)
+        .call()
+    } else {
+      alreadyConfirmed = await this.metadataInstance.methods
+        .isAddressAlreadyVoted(miningKeyToConfirm, senderVotingKey)
+        .call()
+    }
     console.log(alreadyConfirmed)
     if (alreadyConfirmed) {
       throw {
         message: `You already confirmed this change.`
       }
     }
-    const miningKeySender = await this.getMiningByVoting(senderVotingKey)
-    if (miningKeySender === miningKeyToConfirm) {
+    if (senderMiningKey === miningKeyToConfirm) {
       throw {
         message: `You cannot confirm your own changes.\n
           Please ask other validators to verify your new information.`
diff --git a/src/index.js b/src/index.js
index 06a81a2..f3126b0 100644
--- a/src/index.js
+++ b/src/index.js
@@ -58,6 +58,7 @@ class AppMainRouter extends Component {
       metadataContract: null,
       poaConsensus: null,
       votingKey: null,
+      miningKey: null,
       loading: true,
       searchTerm: '',
       injectedWeb3: true,
@@ -86,6 +87,7 @@ class AppMainRouter extends Component {
         })
         this.setState({
           votingKey: web3Config.defaultAccount,
+          miningKey: await keysManager.miningKeyByVoting(web3Config.defaultAccount),
           keysManager,
           metadataContract,
           loading: false,
@@ -139,7 +141,8 @@ class AppMainRouter extends Component {
       try {
         let result = await this.state.metadataContract[methodToCall]({
           miningKeyToConfirm: miningKey,
-          senderVotingKey: this.state.votingKey
+          senderVotingKey: this.state.votingKey,
+          senderMiningKey: this.state.miningKey
         })
         console.log(result)
         this.setState({ loading: false })