diff --git a/.env b/.env
index efd643bfb9..5d9eca39cf 100644
--- a/.env
+++ b/.env
@@ -1,2 +1,2 @@
-TAG=v3.0.0-rc.1
+TAG=v3.0.1
 COMPILER_TAG=v3.0.0
diff --git a/es/tx/builder/helpers.js b/es/tx/builder/helpers.js
index 0830705700..e133fe2447 100644
--- a/es/tx/builder/helpers.js
+++ b/es/tx/builder/helpers.js
@@ -20,7 +20,7 @@ import { BigNumber } from 'bignumber.js'
 
 export const createSalt = salt
 
-const base64Types = ['tx', 'st', 'ss', 'pi', 'ov', 'or', 'cb', 'cs']
+const base64Types = ['tx', 'st', 'ss', 'pi', 'ov', 'or', 'cb', 'cs', 'ba']
 
 /**
  * Build a contract public key
diff --git a/es/tx/builder/index.js b/es/tx/builder/index.js
index 2b15587aaf..577f806518 100644
--- a/es/tx/builder/index.js
+++ b/es/tx/builder/index.js
@@ -50,6 +50,8 @@ function deserializeField (value, type, prefix) {
       return encode(value, prefix)
     case FIELD_TYPES.string:
       return value.toString()
+    case FIELD_TYPES.payload:
+      return encode(value, 'ba')
     case FIELD_TYPES.pointers:
       return readPointers(value)
     case FIELD_TYPES.rlpBinary:
@@ -95,6 +97,7 @@ function serializeField (value, type, prefix) {
       return Buffer.from(value, 'hex')
     case FIELD_TYPES.signatures:
       return value.map(Buffer.from)
+    case FIELD_TYPES.payload:
     case FIELD_TYPES.string:
       return toBytes(value)
     case FIELD_TYPES.pointers:
diff --git a/es/tx/builder/schema.js b/es/tx/builder/schema.js
index 89b97f0db3..44b8dfeab2 100644
--- a/es/tx/builder/schema.js
+++ b/es/tx/builder/schema.js
@@ -248,7 +248,8 @@ export const FIELD_TYPES = {
   proofOfInclusion: 'proofOfInclusion',
   mptree: 'mptree',
   callReturnType: 'callReturnType',
-  ctVersion: 'ctVersion'
+  ctVersion: 'ctVersion',
+  payload: 'payload'
 }
 
 // FEE CALCULATION
@@ -341,7 +342,7 @@ const SPEND_TX = [
   TX_FIELD('fee', FIELD_TYPES.int),
   TX_FIELD('ttl', FIELD_TYPES.int),
   TX_FIELD('nonce', FIELD_TYPES.int),
-  TX_FIELD('payload', FIELD_TYPES.string)
+  TX_FIELD('payload', FIELD_TYPES.payload)
 ]
 
 const SIGNED_TX = [
diff --git a/es/tx/validator.js b/es/tx/validator.js
index 6f52989802..eccd2fb07e 100644
--- a/es/tx/validator.js
+++ b/es/tx/validator.js
@@ -133,7 +133,7 @@ async function unpackAndVerify (txHash, { networkId } = {}) {
 }
 
 const getOwnerPublicKey = (tx) =>
-  tx[['senderId', 'accountId', 'ownerId', 'callerId', 'oracleId'].find(key => tx[key])].replace('ok_', 'ak_')
+  tx[['senderId', 'accountId', 'ownerId', 'callerId', 'oracleId', 'fromId'].find(key => tx[key])].replace('ok_', 'ak_')
 
 /**
  * Verify transaction (verify nonce, ttl, fee, signature, account balance)