diff --git a/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java b/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java
index ff7143e4348..155f4c0a608 100644
--- a/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java
+++ b/rskj-core/src/main/java/org/ethereum/config/blockchain/upgrades/ConsensusRule.java
@@ -88,6 +88,7 @@ public enum ConsensusRule {
     RSKIP385("rskip385"),
     RSKIP398("rskip398"),
     RSKIP400("rskip400"), // From EIP-2028 calldata gas cost reduction
+    RSKIP412("rskip412"), // From EIP-3198 BASEFEE opcode
     ;
 
     private String configKey;
diff --git a/rskj-core/src/main/java/org/ethereum/vm/OpCode.java b/rskj-core/src/main/java/org/ethereum/vm/OpCode.java
index bf51f550c2f..f9de1515e87 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/OpCode.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/OpCode.java
@@ -272,6 +272,11 @@ public enum OpCode {
      */
     CHAINID(0x46, 0, 1, BASE_TIER),
 
+    /**
+     * (0x48) Get the block base fee
+     */
+    BASEFEE(0x48, 0, 1, BASE_TIER),
+
     /*  Memory, Storage and Flow Operations */
 
     /**
diff --git a/rskj-core/src/main/java/org/ethereum/vm/OpCodes.java b/rskj-core/src/main/java/org/ethereum/vm/OpCodes.java
index 4823d52e081..7b483642fb7 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/OpCodes.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/OpCodes.java
@@ -269,6 +269,11 @@ private OpCodes() {
      */
     public static final byte OP_SELFBALANCE = 0x47 ;
 
+    /**
+     * (0x48) Get the block base fee
+     */
+    public static final byte OP_BASEFEE = 0x48 ;
+
     /*  Memory Storage and F Operations */
 
     /**
diff --git a/rskj-core/src/main/java/org/ethereum/vm/VM.java b/rskj-core/src/main/java/org/ethereum/vm/VM.java
index babe9160899..2365d387028 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/VM.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/VM.java
@@ -953,7 +953,7 @@ protected void doRETURNDATACOPY() {
     protected void doGASPRICE(){
         spendOpCodeGas();
         // EXECUTION PHASE
-        DataWord gasPrice = program.getGasPrice();
+        DataWord gasPrice = program.getTxGasPrice();
 
         if (isLogEnabled) {
             hint = "price: " + gasPrice.toString();
@@ -1058,6 +1058,19 @@ protected void doGASLIMIT() {
         program.step();
     }
 
+    protected void doBASEFEE() {
+        spendOpCodeGas();
+        // EXECUTION PHASE
+        DataWord minimumGasPrice = program.getMinimumGasPrice();
+
+        if (isLogEnabled) {
+            hint = "baseFee: " + minimumGasPrice;
+        }
+
+        program.stackPush(minimumGasPrice);
+        program.step();
+    }
+
     protected void doCHAINID() {
         spendOpCodeGas();
         // EXECUTION PHASE
@@ -1834,6 +1847,12 @@ protected void executeOpcode() {
             break;
             case OpCodes.OP_GASLIMIT: doGASLIMIT();
             break;
+            case OpCodes.OP_BASEFEE:
+                if (!activations.isActive(RSKIP412)) {
+                    throw Program.ExceptionHelper.invalidOpCode(program);
+                }
+                doBASEFEE();
+            break;
             case OpCodes.OP_CHAINID:
                 if (!activations.isActive(RSKIP152)) {
                     throw Program.ExceptionHelper.invalidOpCode(program);
diff --git a/rskj-core/src/main/java/org/ethereum/vm/program/Program.java b/rskj-core/src/main/java/org/ethereum/vm/program/Program.java
index 9a2ec121b15..849be161beb 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/program/Program.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/program/Program.java
@@ -195,7 +195,7 @@ private InternalTransaction addInternalTx(byte[] nonce, DataWord gasLimit, RskAd
                 transaction,
                 getCallDeep(),
                 senderNonce,
-                getGasPrice(),
+                getTxGasPrice(),
                 gasLimit,
                 senderAddress.getBytes(),
                 receiveAddress.getBytes(),
@@ -1022,8 +1022,12 @@ public DataWord getCallerAddress() {
         return invoke.getCallerAddress();
     }
 
-    public DataWord getGasPrice() {
-        return invoke.getMinGasPrice();
+    public DataWord getTxGasPrice() {
+        return invoke.getTxGasPrice();
+    }
+
+    public DataWord getMinimumGasPrice() {
+        return invoke.getMinimumGasPrice();
     }
 
     public long getRemainingGas() {
diff --git a/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvoke.java b/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvoke.java
index d2538b4f5c5..1bdf64b0d89 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvoke.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvoke.java
@@ -33,7 +33,7 @@ public interface ProgramInvoke extends InvokeData {
 
     DataWord getOriginAddress();
 
-    DataWord getMinGasPrice();
+    DataWord getTxGasPrice();
 
     DataWord getPrevHash();
 
@@ -49,6 +49,8 @@ public interface ProgramInvoke extends InvokeData {
 
     DataWord getGaslimit();
 
+    DataWord getMinimumGasPrice();
+
     boolean byTransaction();
 
     boolean byTestingSuite();
diff --git a/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeFactoryImpl.java b/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeFactoryImpl.java
index cd07c765f07..286c2662b19 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeFactoryImpl.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeFactoryImpl.java
@@ -64,7 +64,7 @@ public ProgramInvoke createProgramInvoke(Transaction tx, int txindex, Block bloc
         Coin balance = repository.getBalance(addr);
 
         /***         GASPRICE op       ***/
-        Coin gasPrice = tx.getGasPrice();
+        Coin txGasPrice = tx.getGasPrice();
 
         /*** GAS op ***/
         byte[] gas = tx.getGasLimit();
@@ -95,13 +95,16 @@ public ProgramInvoke createProgramInvoke(Transaction tx, int txindex, Block bloc
         /*** GASLIMIT op ***/
         byte[] gaslimit = block.getGasLimit();
 
+        /*** BASEFEE op ***/
+        Coin minimumGasPrice = block.getMinimumGasPrice();
+
         if (logger.isInfoEnabled()) {
             logger.info("Top level call: \n" +
                             "address={}\n" +
                             "origin={}\n" +
                             "caller={}\n" +
                             "balance={}\n" +
-                            "gasPrice={}\n" +
+                            "txGasPrice={}\n" +
                             "gas={}\n" +
                             "callValue={}\n" +
                             "data={}\n" +
@@ -111,13 +114,14 @@ public ProgramInvoke createProgramInvoke(Transaction tx, int txindex, Block bloc
                             "blockNumber={}\n" +
                             "transactionIndex={}\n" +
                             "difficulty={}\n" +
-                            "gaslimit={}\n",
+                            "gaslimit={}\n" +
+                            "minimumGasPrice={}\n",
 
                     addr,
                     ByteUtil.toHexString(origin),
                     ByteUtil.toHexString(caller),
                     balance,
-                    gasPrice,
+                    txGasPrice,
                     new BigInteger(1, gas).longValue(),
                     callValue,
                     ByteUtil.toHexString(data),
@@ -127,11 +131,14 @@ public ProgramInvoke createProgramInvoke(Transaction tx, int txindex, Block bloc
                     number,
                     txindex,
                     ByteUtil.toHexString(difficulty),
-                    gaslimit);
+                    gaslimit,
+                    minimumGasPrice);
         }
 
-        return new ProgramInvokeImpl(addr.getBytes(), origin, caller, balance.getBytes(), gasPrice.getBytes(), gas, callValue.getBytes(), data,
-                lastHash, coinbase, timestamp, number, txindex,difficulty, gaslimit,
+        byte[] minGasPrice = minimumGasPrice != null ? minimumGasPrice.getBytes() : ByteUtil.EMPTY_BYTE_ARRAY;
+
+        return new ProgramInvokeImpl(addr.getBytes(), origin, caller, balance.getBytes(), txGasPrice.getBytes(), gas, callValue.getBytes(), data,
+                lastHash, coinbase, timestamp, number, txindex,difficulty, gaslimit, minGasPrice,
                 repository, blockStore);
     }
 
@@ -151,7 +158,7 @@ public ProgramInvoke createProgramInvoke(Program program, DataWord toAddress, Da
         DataWord caller = callerAddress;
 
         DataWord balance = DataWord.valueOf(balanceInt.getBytes());
-        DataWord gasPrice = program.getGasPrice();
+        DataWord txGasPrice = program.getTxGasPrice();
         long agas = inGas;
         DataWord callValue = inValue;
 
@@ -163,6 +170,7 @@ public ProgramInvoke createProgramInvoke(Program program, DataWord toAddress, Da
         DataWord transactionIndex = program.getTransactionIndex();
         DataWord difficulty = program.getDifficulty();
         DataWord gasLimit = program.getGasLimit();
+        DataWord minimumGasPrice = program.getMinimumGasPrice();
 
         if (logger.isInfoEnabled()) {
             logger.info("Internal call: \n" +
@@ -170,7 +178,7 @@ public ProgramInvoke createProgramInvoke(Program program, DataWord toAddress, Da
                             "origin={}\n" +
                             "caller={}\n" +
                             "balance={}\n" +
-                            "gasPrice={}\n" +
+                            "txGasPrice={}\n" +
                             "gas={}\n" +
                             "callValue={}\n" +
                             "data={}\n" +
@@ -180,12 +188,13 @@ public ProgramInvoke createProgramInvoke(Program program, DataWord toAddress, Da
                             "blockNumber={}\n" +
                             "transactionIndex={}\n" +
                             "difficulty={}\n" +
-                            "gaslimit={}\n",
+                            "gaslimit={}\n" +
+                            "minimumGasPrice={}\n",
                     ByteUtil.toHexString(address.getLast20Bytes()),
                     ByteUtil.toHexString(origin.getLast20Bytes()),
                     ByteUtil.toHexString(caller.getLast20Bytes()),
                     balance.toString(),
-                    gasPrice.longValue(),
+                    txGasPrice.longValue(),
                     agas,
                     ByteUtil.toHexString(callValue.getNoLeadZeroesData()),
                     data == null ? "" : ByteUtil.toHexString(data),
@@ -195,12 +204,13 @@ public ProgramInvoke createProgramInvoke(Program program, DataWord toAddress, Da
                     number.longValue(),
                     transactionIndex.intValue(),
                     ByteUtil.toHexString(difficulty.getNoLeadZeroesData()),
-                    gasLimit.bigIntValue());
+                    gasLimit.bigIntValue(),
+                    minimumGasPrice.longValue());
         }
 
-        return new ProgramInvokeImpl(address, origin, caller, balance, gasPrice, agas, callValue,
+        return new ProgramInvokeImpl(address, origin, caller, balance, txGasPrice, agas, callValue,
                 data, lastHash, coinbase, timestamp, number, transactionIndex, difficulty, gasLimit,
-                repository, program.getCallDeep() + 1, blockStore,
+                minimumGasPrice, repository, program.getCallDeep() + 1, blockStore,
                 isStaticCall, byTestingSuite);
     }
 }
diff --git a/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeImpl.java b/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeImpl.java
index b661f43b33a..4127dfa833b 100644
--- a/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeImpl.java
+++ b/rskj-core/src/main/java/org/ethereum/vm/program/invoke/ProgramInvokeImpl.java
@@ -43,7 +43,7 @@ public class ProgramInvokeImpl implements ProgramInvoke {
     private final DataWord origin;
     private final DataWord caller;
     private final DataWord balance;
-    private final DataWord gasPrice;
+    private final DataWord txGasPrice;
     private final DataWord callValue;
     private long gas;
 
@@ -58,6 +58,7 @@ public class ProgramInvokeImpl implements ProgramInvoke {
     private final DataWord number;
     private final DataWord difficulty;
     private final DataWord gaslimit;
+    private final DataWord minimumGasPrice;
 
     private final DataWord transactionIndex;
 
@@ -70,12 +71,12 @@ public class ProgramInvokeImpl implements ProgramInvoke {
     private boolean isStaticCall = false;
 
     public ProgramInvokeImpl(DataWord address, DataWord origin, DataWord caller, DataWord balance,
-                             DataWord gasPrice,
+                             DataWord txGasPrice,
                              long gas,
                              DataWord callValue, byte[] msgData,
                              DataWord lastHash, DataWord coinbase, DataWord timestamp, DataWord number, DataWord transactionIndex, DataWord
                                      difficulty,
-                             DataWord gaslimit, Repository repository, int callDeep, BlockStore blockStore,
+                             DataWord gaslimit, DataWord minimumGasPrice, Repository repository, int callDeep, BlockStore blockStore,
                              boolean isStaticCall,
                              boolean byTestingSuite) {
 
@@ -84,7 +85,7 @@ public ProgramInvokeImpl(DataWord address, DataWord origin, DataWord caller, Dat
         this.origin = origin;
         this.caller = caller;
         this.balance = balance;
-        this.gasPrice = gasPrice;
+        this.txGasPrice = txGasPrice;
         this.gas = gas;
         this.callValue = callValue;
         this.msgData = msgData;
@@ -97,6 +98,7 @@ public ProgramInvokeImpl(DataWord address, DataWord origin, DataWord caller, Dat
         this.transactionIndex = transactionIndex;
         this.difficulty = difficulty;
         this.gaslimit = gaslimit;
+        this.minimumGasPrice = minimumGasPrice;
 
         this.repository = repository;
         this.byTransaction = false;
@@ -107,22 +109,22 @@ public ProgramInvokeImpl(DataWord address, DataWord origin, DataWord caller, Dat
     }
 
     public ProgramInvokeImpl(byte[] address, byte[] origin, byte[] caller, byte[] balance,
-                             byte[] gasPrice, byte[] gas, byte[] callValue, byte[] msgData,
+                             byte[] txGasPrice, byte[] gas, byte[] callValue, byte[] msgData,
                              byte[] lastHash, byte[] coinbase, long timestamp, long number, int transactionIndex, byte[] difficulty,
-                             byte[] gaslimit,
+                             byte[] gaslimit, byte[] minimumGasPrice,
                              Repository repository, BlockStore blockStore,
                              boolean byTestingSuite) {
-        this(address, origin, caller, balance, gasPrice, gas, callValue, msgData, lastHash, coinbase,
-                timestamp, number, transactionIndex, difficulty, gaslimit, repository, blockStore);
+        this(address, origin, caller, balance, txGasPrice, gas, callValue, msgData, lastHash, coinbase,
+                timestamp, number, transactionIndex, difficulty, gaslimit, minimumGasPrice, repository, blockStore);
 
         this.byTestingSuite = byTestingSuite;
     }
 
 
     public ProgramInvokeImpl(byte[] address, byte[] origin, byte[] caller, byte[] balance,
-                             byte[] gasPrice, byte[] gas, byte[] callValue, byte[] msgData,
+                             byte[] txGasPrice, byte[] gas, byte[] callValue, byte[] msgData,
                              byte[] lastHash, byte[] coinbase, long timestamp, long number, int transactionIndex, byte[] difficulty,
-                             byte[] gaslimit,
+                             byte[] gaslimit, byte[] minimumGasPrice,
                              Repository repository, BlockStore blockStore) {
 
         // Transaction env
@@ -130,7 +132,7 @@ public ProgramInvokeImpl(byte[] address, byte[] origin, byte[] caller, byte[] ba
         this.origin = DataWord.valueOf(origin);
         this.caller = DataWord.valueOf(caller);
         this.balance = DataWord.valueOf(balance);
-        this.gasPrice = DataWord.valueOf(gasPrice);
+        this.txGasPrice = DataWord.valueOf(txGasPrice);
         this.gas = Program.limitToMaxLong(DataWord.valueOf(gas));
         this.callValue = DataWord.valueOf(callValue);
         this.msgData = msgData;
@@ -143,42 +145,50 @@ public ProgramInvokeImpl(byte[] address, byte[] origin, byte[] caller, byte[] ba
         this.transactionIndex = DataWord.valueOf(transactionIndex);
         this.difficulty = DataWord.valueOf(difficulty);
         this.gaslimit = DataWord.valueOf(gaslimit);
+        this.minimumGasPrice = DataWord.valueOf(minimumGasPrice);
 
         this.repository = repository;
         this.blockStore = blockStore;
     }
 
     /*           ADDRESS op         */
+    @Override
     public DataWord getOwnerAddress() {
         return address;
     }
 
     /*           BALANCE op         */
+    @Override
     public DataWord getBalance() {
         return balance;
     }
 
     /*           ORIGIN op         */
+    @Override
     public DataWord getOriginAddress() {
         return origin;
     }
 
     /*           CALLER op         */
+    @Override
     public DataWord getCallerAddress() {
         return caller;
     }
 
     /*           GASPRICE op       */
-    public DataWord getMinGasPrice() {
-        return gasPrice;
+    @Override
+    public DataWord getTxGasPrice() {
+        return txGasPrice;
     }
 
     /*           GAS op       */
+    @Override
     public long  getGas() {
         return gas;
     }
 
     /*          CALLVALUE op    */
+    @Override
     public DataWord getCallValue() {
         return callValue;
     }
@@ -192,6 +202,7 @@ public DataWord getCallValue() {
     private static BigInteger maxMsgData = BigInteger.valueOf(Integer.MAX_VALUE);
 
     /*     CALLDATALOAD  op   */
+    @Override
     public DataWord getDataValue(DataWord indexData) {
 
         BigInteger tempIndex = indexData.value();
@@ -212,6 +223,7 @@ public DataWord getDataValue(DataWord indexData) {
     }
 
     /*  CALLDATASIZE */
+    @Override
     public DataWord getDataSize() {
 
         if (msgData == null || msgData.length == 0) {
@@ -222,6 +234,7 @@ public DataWord getDataSize() {
     }
 
     /*  CALLDATACOPY */
+    @Override
     public byte[] getDataCopy(DataWord offsetData, DataWord lengthData) {
 
         int offset = offsetData.intValueSafe();
@@ -246,45 +259,59 @@ public byte[] getDataCopy(DataWord offsetData, DataWord lengthData) {
 
 
     /*     PREVHASH op    */
+    @Override
     public DataWord getPrevHash() {
         return prevHash;
     }
 
     /*     COINBASE op    */
+    @Override
     public DataWord getCoinbase() {
         return coinbase;
     }
 
     /*     TIMESTAMP op    */
+    @Override
     public DataWord getTimestamp() {
         return timestamp;
     }
 
     /*     NUMBER op    */
+    @Override
     public DataWord getNumber() {
         return number;
     }
 
     /*     TXINDEX op    */
+    @Override
     public DataWord getTransactionIndex() {
         return transactionIndex;
     }
 
     /*     DIFFICULTY op    */
+    @Override
     public DataWord getDifficulty() {
         return difficulty;
     }
 
     /*     GASLIMIT op    */
+    @Override
     public DataWord getGaslimit() {
         return gaslimit;
     }
 
+    /*     BASEFEE op    */
+    @Override
+    public DataWord getMinimumGasPrice() {
+        return minimumGasPrice;
+    }
+
     /*  Storage */
     public Map<DataWord, DataWord> getStorage() {
         return storage;
     }
 
+    @Override
     public Repository getRepository() {
         return repository;
     }
@@ -352,12 +379,15 @@ public boolean equals(Object o) {
         if (gas!=that.gas) {
             return false;
         }
-        if (gasPrice != null ? !gasPrice.equals(that.gasPrice) : that.gasPrice != null) {
+        if (txGasPrice != null ? !txGasPrice.equals(that.txGasPrice) : that.txGasPrice != null) {
             return false;
         }
         if (gaslimit != null ? !gaslimit.equals(that.gaslimit) : that.gaslimit != null) {
             return false;
         }
+        if (minimumGasPrice != null ? !minimumGasPrice.equals(that.minimumGasPrice) : that.minimumGasPrice != null) {
+            return false;
+        }
         if (!Arrays.equals(msgData, that.msgData)) {
             return false;
         }
@@ -385,7 +415,7 @@ public boolean equals(Object o) {
 
     @Override
     public int hashCode() {
-        int result = Objects.hash(address, origin, caller, balance, gasPrice, callValue, gas, prevHash, coinbase, timestamp, number, difficulty, gaslimit, storage, repository, byTransaction, byTestingSuite);
+        int result = Objects.hash(address, origin, caller, balance, txGasPrice, callValue, gas, prevHash, coinbase, timestamp, number, difficulty, gaslimit, minimumGasPrice, storage, repository, byTransaction, byTestingSuite);
         result = 31 * result + Arrays.hashCode(msgData);
         return result;
     }
@@ -398,7 +428,7 @@ public String toString() {
                 ", caller=" + caller +
                 ", balance=" + balance +
                 ", gas=" + gas +
-                ", gasPrice=" + gasPrice +
+                ", txGasPrice=" + txGasPrice +
                 ", callValue=" + callValue +
                 ", msgData=" + Arrays.toString(msgData) +
                 ", prevHash=" + prevHash +
@@ -407,6 +437,7 @@ public String toString() {
                 ", number=" + number +
                 ", difficulty=" + difficulty +
                 ", gaslimit=" + gaslimit +
+                ", minimumGasPrice=" + minimumGasPrice +
                 ", storage=" + storage +
                 ", repository=" + repository +
                 ", byTransaction=" + byTransaction +
diff --git a/rskj-core/src/main/resources/expected.conf b/rskj-core/src/main/resources/expected.conf
index 57e52beb51f..d850dfec6bb 100644
--- a/rskj-core/src/main/resources/expected.conf
+++ b/rskj-core/src/main/resources/expected.conf
@@ -87,6 +87,7 @@ blockchain = {
              rskip385 = <hardforkName>
              rskip398 = <hardforkName>
              rskip400 = <hardforkName>
+             rskip412 = <hardforkName>
          }
     }
     gc = {
diff --git a/rskj-core/src/main/resources/reference.conf b/rskj-core/src/main/resources/reference.conf
index 8c8ee860e6c..2328a5d9f43 100644
--- a/rskj-core/src/main/resources/reference.conf
+++ b/rskj-core/src/main/resources/reference.conf
@@ -74,6 +74,7 @@ blockchain = {
             rskip385 = fingerroot500
             rskip398 = arrowhead600
             rskip400 = arrowhead600
+            rskip412 = arrowhead600
         }
     }
     gc = {
diff --git a/rskj-core/src/test/java/co/rsk/rpc/modules/trace/TraceTransformerTest.java b/rskj-core/src/test/java/co/rsk/rpc/modules/trace/TraceTransformerTest.java
index c17c96533bb..da578fc7499 100644
--- a/rskj-core/src/test/java/co/rsk/rpc/modules/trace/TraceTransformerTest.java
+++ b/rskj-core/src/test/java/co/rsk/rpc/modules/trace/TraceTransformerTest.java
@@ -43,7 +43,7 @@ void getActionFromInvokeData() {
                 gas,
                 callValue,
                 data,
-                null, null, null, null, null, null,
+                null, null, null, null, null, null, null,
                 null, null, 0, null, false, false);
 
         TraceAction action = TraceTransformer.toAction(TraceType.CALL, invoke, CallType.CALL, null, null, null);
@@ -76,7 +76,7 @@ void getActionFromInvokeDataWithCreationData() {
                 gas,
                 callValue,
                 null,
-                null, null, null, null, null, null,
+                null, null, null, null, null, null, null,
                 null, null, 0, null, false, false);
 
         TraceAction action = TraceTransformer.toAction(TraceType.CREATE, invoke, CallType.NONE, data, null, null);
@@ -110,7 +110,7 @@ void getActionFromInvokeDataWithCreationDataUsingCreationMethod() {
                 gas,
                 callValue,
                 null,
-                null, null, null, null, null, null,
+                null, null, null, null, null, null, null,
                 null, null, 0, null, false, false);
 
         TraceAction action = TraceTransformer.toAction(TraceType.CREATE, invoke, CallType.NONE, data, "create2", null);
diff --git a/rskj-core/src/test/java/co/rsk/vm/VMExecutionTest.java b/rskj-core/src/test/java/co/rsk/vm/VMExecutionTest.java
index 11717e15cf5..6f2d5b56558 100644
--- a/rskj-core/src/test/java/co/rsk/vm/VMExecutionTest.java
+++ b/rskj-core/src/test/java/co/rsk/vm/VMExecutionTest.java
@@ -901,6 +901,7 @@ private void executePush0(ActivationConfig.ForBlock activations){
         Assertions.assertEquals(1, stack.size());
         Assertions.assertEquals(DataWord.valueFromHex("0000000000000000000000000000000000000000000000000000000000000000"), stack.peek());
     }
+
     @Test
     void testPUSH0Activation() {
         ActivationConfig.ForBlock activations = mock(ActivationConfig.ForBlock.class);
@@ -917,6 +918,33 @@ void testPUSH0NoActivation() {
         Assertions.assertThrows(Program.IllegalOperationException.class, () -> {
             executePush0(activations);
         });
+    }
+
+    @Test
+    void testBASEFFEActivation() {
+        ActivationConfig.ForBlock activations = mock(ActivationConfig.ForBlock.class);
+        when(activations.isActive(RSKIP412)).thenReturn(true);
+
+        executeBASEFEE(activations);
+    }
+
+    @Test
+    void testBASEFEENoActivation() {
+        ActivationConfig.ForBlock activations = mock(ActivationConfig.ForBlock.class);
+        when(activations.isActive(RSKIP412)).thenReturn(false);
+
+        Assertions.assertThrows(Program.IllegalOperationException.class, () -> {
+            executeBASEFEE(activations);
+        });
+    }
+
+    private void executeBASEFEE(ActivationConfig.ForBlock activations) {
+        Program program = executeCodeWithActivationConfig("BASEFEE", 1, activations);
+        Stack stack = program.getStack();
+
+        Assertions.assertEquals(1, stack.size());
 
+        // See ProgramInvokeMockImpl.getMinimumGasPrice()
+        Assertions.assertEquals(DataWord.valueFromHex("000000000000000000000000000000000000000000000000000003104e60a000"), stack.peek());
     }
 }
diff --git a/rskj-core/src/test/java/co/rsk/vm/opcode/BasefeeDslTest.java b/rskj-core/src/test/java/co/rsk/vm/opcode/BasefeeDslTest.java
new file mode 100644
index 00000000000..bb52b96c9ef
--- /dev/null
+++ b/rskj-core/src/test/java/co/rsk/vm/opcode/BasefeeDslTest.java
@@ -0,0 +1,179 @@
+/*
+ * This file is part of RskJ
+ * Copyright (C) 2023 RSK Labs Ltd.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package co.rsk.vm.opcode;
+
+import co.rsk.config.TestSystemProperties;
+import co.rsk.test.World;
+import co.rsk.test.dsl.DslParser;
+import co.rsk.test.dsl.DslProcessorException;
+import co.rsk.test.dsl.WorldDslProcessor;
+import org.ethereum.config.blockchain.upgrades.ActivationConfig;
+import org.ethereum.config.blockchain.upgrades.ConsensusRule;
+import org.ethereum.core.Block;
+import org.ethereum.core.Transaction;
+import org.ethereum.core.TransactionReceipt;
+import org.ethereum.core.util.TransactionReceiptUtil;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.io.FileNotFoundException;
+
+import static org.mockito.ArgumentMatchers.*;
+import static org.mockito.Mockito.*;
+
+public class BasefeeDslTest {
+
+    @Test
+    void testBASEFEE_whenActivated_behavesAsExpected() throws FileNotFoundException, DslProcessorException {
+        DslParser parser = DslParser.fromResource("dsl/opcode/basefee/baseFeeActivatedTest.txt");
+        World world = new World();
+        WorldDslProcessor processor = new WorldDslProcessor(world);
+        processor.processCommands(parser);
+
+        // Assertions
+
+        // There's one block (b01) containing only 1 transaction
+        Block block1 = world.getBlockByName("b01");
+        Assertions.assertNotNull(block1);
+        Assertions.assertEquals(1, block1.getTransactionsList().size());
+
+        // There's a transaction called txTestBasefee
+        Transaction txTestBasefee = world.getTransactionByName("txTestBasefee");
+        Assertions.assertNotNull(txTestBasefee);
+
+        // Transaction txTestBasefee has a transaction receipt
+        TransactionReceipt txTestBasefeeReceipt = world.getTransactionReceiptByName("txTestBasefee");
+        Assertions.assertNotNull(txTestBasefeeReceipt);
+
+        // Transaction txTestBasefee has been processed correctly
+        byte[] creationStatus = txTestBasefeeReceipt.getStatus();
+        Assertions.assertNotNull(creationStatus);
+        Assertions.assertEquals(1, creationStatus.length);
+        Assertions.assertEquals(1, creationStatus[0]);
+
+        // There's one block (b02) containing only 1 transaction
+        Block block2 = world.getBlockByName("b02");
+        Assertions.assertNotNull(block2);
+        Assertions.assertEquals(1, block2.getTransactionsList().size());
+
+        // There's a transaction called txTestBasefeeOKCall
+        Transaction txTestBasefeeOKCall = world.getTransactionByName("txTestBasefeeOKCall");
+        Assertions.assertNotNull(txTestBasefeeOKCall);
+
+        // Transaction txTestBasefeeOKCall has a transaction receipt
+        TransactionReceipt txTestBasefeeOKCallReceipt = world.getTransactionReceiptByName("txTestBasefeeOKCall");
+        Assertions.assertNotNull(txTestBasefeeOKCallReceipt);
+
+        // Transaction txTestBasefeeOKCall has been processed correctly
+        byte[] txTestBasefeeOKCallCreationStatus = txTestBasefeeOKCallReceipt.getStatus();
+        Assertions.assertNotNull(txTestBasefeeOKCallCreationStatus);
+        Assertions.assertEquals(1, txTestBasefeeOKCallCreationStatus.length);
+        Assertions.assertEquals(1, txTestBasefeeOKCallCreationStatus[0]);
+
+        // Check events
+        Assertions.assertEquals(1, TransactionReceiptUtil.getEventCount(txTestBasefeeOKCallReceipt, "OK", null));
+        Assertions.assertEquals(0, TransactionReceiptUtil.getEventCount(txTestBasefeeOKCallReceipt, "ERROR", null));
+
+        // There's one block (b03) containing only 1 transaction
+        Block block3 = world.getBlockByName("b03");
+        Assertions.assertNotNull(block3);
+        Assertions.assertEquals(1, block3.getTransactionsList().size());
+
+        // There's a transaction called txTestBasefeeErrorCall
+        Transaction txTestBasefeeErrorCall = world.getTransactionByName("txTestBasefeeErrorCall");
+        Assertions.assertNotNull(txTestBasefeeErrorCall);
+
+        // Transaction txTestBasefeeErrorCall has a transaction receipt
+        TransactionReceipt txTestBasefeeErrorCallReceipt = world.getTransactionReceiptByName("txTestBasefeeErrorCall");
+        Assertions.assertNotNull(txTestBasefeeErrorCallReceipt);
+
+        // Transaction txTestBasefeeErrorCall has been processed correctly
+        byte[] txTestBasefeeErrorCallCreationStatus = txTestBasefeeErrorCallReceipt.getStatus();
+        Assertions.assertNotNull(txTestBasefeeErrorCallCreationStatus);
+        Assertions.assertEquals(1, txTestBasefeeErrorCallCreationStatus.length);
+        Assertions.assertEquals(1, txTestBasefeeErrorCallCreationStatus[0]);
+
+        // Check events
+        Assertions.assertEquals(1, TransactionReceiptUtil.getEventCount(txTestBasefeeErrorCallReceipt, "ERROR", null));
+        Assertions.assertEquals(0, TransactionReceiptUtil.getEventCount(txTestBasefeeErrorCallReceipt, "OK", null));
+    }
+
+    @Test
+    void testBASEFEE_whenNotActivated_BehavesAsExpected() throws FileNotFoundException, DslProcessorException {
+
+        // Config Spies Setup
+
+        TestSystemProperties config = new TestSystemProperties();
+        ActivationConfig activationConfig = config.getActivationConfig();
+
+        TestSystemProperties configSpy = spy(config);
+        ActivationConfig activationConfigSpy = spy(activationConfig);
+
+        doReturn(activationConfigSpy).when(configSpy).getActivationConfig();
+        doReturn(false).when(activationConfigSpy).isActive(eq(ConsensusRule.RSKIP412), anyLong());
+
+        // Test Setup
+
+        DslParser parser = DslParser.fromResource("dsl/opcode/basefee/baseFeeNotActivatedTest.txt");
+        World world = new World(configSpy);
+        WorldDslProcessor processor = new WorldDslProcessor(world);
+        processor.processCommands(parser);
+
+        // Assertions
+
+        // There's one block (b01) containing only 1 transaction
+        Block block1 = world.getBlockByName("b01");
+        Assertions.assertNotNull(block1);
+        Assertions.assertEquals(1, block1.getTransactionsList().size());
+
+        // There's a transaction called txTestBasefee
+        Transaction txTestBasefee = world.getTransactionByName("txTestBasefee");
+        Assertions.assertNotNull(txTestBasefee);
+
+        // Transaction txTestBasefee has a transaction receipt
+        TransactionReceipt txTestBasefeeReceipt = world.getTransactionReceiptByName("txTestBasefee");
+        Assertions.assertNotNull(txTestBasefeeReceipt);
+
+        // Transaction txTestBasefee has been processed correctly
+        byte[] creationStatus = txTestBasefeeReceipt.getStatus();
+        Assertions.assertNotNull(creationStatus);
+        Assertions.assertEquals(1, creationStatus.length);
+        Assertions.assertEquals(1, creationStatus[0]);
+
+        verify(activationConfigSpy, atLeast(1)).isActive(eq(ConsensusRule.RSKIP412), eq(2L));
+
+        // There's one block (b02) containing only 1 transaction
+        Block block2 = world.getBlockByName("b02");
+        Assertions.assertNotNull(block2);
+        Assertions.assertEquals(1, block2.getTransactionsList().size());
+
+        // There's a transaction called txTestBasefeeNotActivated
+        Transaction txTestBasefeeNotActivated = world.getTransactionByName("txTestBasefeeNotActivated");
+        Assertions.assertNotNull(txTestBasefeeNotActivated);
+
+        // Transaction txTestBasefeeNotActivated has a transaction receipt
+        TransactionReceipt txTestBasefeeNotActivatedReceipt = world.getTransactionReceiptByName("txTestBasefeeNotActivated");
+        Assertions.assertNotNull(txTestBasefeeNotActivatedReceipt);
+
+        // Transaction txTestBasefeeNotActivated has failed
+        byte[] txTestBasefeeNotActivatedCreationStatus = txTestBasefeeNotActivatedReceipt.getStatus();
+        Assertions.assertNotNull(txTestBasefeeNotActivatedCreationStatus);
+        Assertions.assertEquals(0, txTestBasefeeNotActivatedCreationStatus.length);
+    }
+
+}
diff --git a/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java b/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java
index 1e4d4cfeab0..92e44f80e2a 100644
--- a/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java
+++ b/rskj-core/src/test/java/org/ethereum/config/blockchain/upgrades/ActivationConfigTest.java
@@ -114,6 +114,7 @@ class ActivationConfigTest {
             "    rskip385: fingerroot500",
             "    rskip398: arrowhead600",
             "    rskip400: arrowhead600",
+            "    rskip412: arrowhead600",
             "}"
     ));
 
diff --git a/rskj-core/src/test/java/org/ethereum/jsontestsuite/Env.java b/rskj-core/src/test/java/org/ethereum/jsontestsuite/Env.java
index 4aef0fd6eaf..02c10efe8bd 100644
--- a/rskj-core/src/test/java/org/ethereum/jsontestsuite/Env.java
+++ b/rskj-core/src/test/java/org/ethereum/jsontestsuite/Env.java
@@ -16,12 +16,8 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-
 package org.ethereum.jsontestsuite;
 
-import com.fasterxml.jackson.databind.JsonNode;
-import org.bouncycastle.util.BigIntegers;
-import org.bouncycastle.util.encoders.Hex;
 import org.ethereum.util.ByteUtil;
 
 /**
@@ -33,50 +29,24 @@ public class Env {
     private final byte[] currentCoinbase;
     private final byte[] currentDifficulty;
     private final byte[] currentGasLimit;
+    private final byte[] currentMinimumGasPrice;
     private final byte[] currentNumber;
     private final byte[] currentTimestamp;
     private final byte[] previousHash;
 
-
     public Env(byte[] currentCoinbase, byte[] currentDifficulty, byte[]
-            currentGasLimit, byte[] currentNumber, byte[]
-            currentTimestamp, byte[] previousHash) {
+            currentGasLimit, byte[] currentMinimumGasPrice,
+            byte[] currentNumber, byte[] currentTimestamp,
+            byte[] previousHash) {
         this.currentCoinbase = currentCoinbase;
         this.currentDifficulty = currentDifficulty;
         this.currentGasLimit = currentGasLimit;
+        this.currentMinimumGasPrice = currentMinimumGasPrice;
         this.currentNumber = currentNumber;
         this.currentTimestamp = currentTimestamp;
         this.previousHash = previousHash;
     }
 
-    /*
-                e.g:
-                    "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba",
-                    "currentDifficulty" : "256",
-                    "currentGasLimit" : "1000000",
-                    "currentNumber" : "0",
-                    "currentTimestamp" : 1,
-                    "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6"
-          */
-    public Env(JsonNode env) {
-
-        String coinbase = env.get("currentCoinbase").asText();
-        String difficulty = env.get("currentDifficulty").asText();
-        String timestamp = env.get("currentTimestamp").asText();
-        String number = env.get("currentNumber").asText();
-        String gasLimit = org.ethereum.json.Utils.parseUnidentifiedBase(env.get("currentGasLimit").asText());
-        JsonNode previousHash = env.get("previousHash");
-        String prevHash = previousHash == null ? "" : previousHash.asText();
-
-        this.currentCoinbase = Hex.decode(coinbase);
-        this.currentDifficulty = BigIntegers.asUnsignedByteArray(TestingCase.toBigInt(difficulty) );
-        this.currentGasLimit =   BigIntegers.asUnsignedByteArray(TestingCase.toBigInt(gasLimit));
-        this.currentNumber = TestingCase.toBigInt(number).toByteArray();
-        this.currentTimestamp = TestingCase.toBigInt(timestamp).toByteArray();
-        this.previousHash = Hex.decode(prevHash);
-
-    }
-
     public byte[] getCurrentCoinbase() {
         return currentCoinbase;
     }
@@ -89,6 +59,10 @@ public byte[] getCurrentGasLimit() {
         return currentGasLimit;
     }
 
+    public byte[] getCurrentMinimumGasPrice() {
+        return currentMinimumGasPrice;
+    }
+
     public byte[] getCurrentNumber() {
         return currentNumber;
     }
@@ -107,6 +81,7 @@ public String toString() {
                 "currentCoinbase=" + ByteUtil.toHexString(currentCoinbase) +
                 ", currentDifficulty=" + ByteUtil.toHexString(currentDifficulty) +
                 ", currentGasLimit=" + ByteUtil.toHexString(currentGasLimit) +
+                ", currentMinimumGasPrice=" + ByteUtil.toHexString(currentMinimumGasPrice) +
                 ", currentNumber=" + ByteUtil.toHexString(currentNumber) +
                 ", currentTimestamp=" + ByteUtil.toHexString(currentTimestamp) +
                 ", previousHash=" + ByteUtil.toHexString(previousHash) +
diff --git a/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestProgramInvokeFactory.java b/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestProgramInvokeFactory.java
index e19db998bad..3af60cfbe7c 100644
--- a/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestProgramInvokeFactory.java
+++ b/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestProgramInvokeFactory.java
@@ -47,7 +47,7 @@ public TestProgramInvokeFactory(Env env) {
 
     @Override
     public ProgramInvoke createProgramInvoke(Transaction tx, int txindex, Block block, Repository repository, BlockStore blockStore, SignatureCache signatureCache) {
-        return generalInvoke(tx, txindex, repository, blockStore, signatureCache);
+        return generalInvoke(tx, txindex, block, repository, blockStore, signatureCache);
     }
 
     @Override
@@ -59,7 +59,7 @@ public ProgramInvoke createProgramInvoke(Program program, DataWord toAddress, Da
         return null;
     }
 
-    private ProgramInvoke generalInvoke(Transaction tx, int txindex, Repository repository, BlockStore blockStore, SignatureCache signatureCache) {
+    private ProgramInvoke generalInvoke(Transaction tx, int txindex, Block block, Repository repository, BlockStore blockStore, SignatureCache signatureCache) {
 
         /***         ADDRESS op       ***/
         // YP: Get address of currently executing account.
@@ -77,7 +77,7 @@ private ProgramInvoke generalInvoke(Transaction tx, int txindex, Repository repo
         Coin balance = repository.getBalance(addr);
 
         /***         GASPRICE op       ***/
-        Coin gasPrice = tx.getGasPrice();
+        Coin txGasPrice = tx.getGasPrice();
 
         /*** GAS op ***/
         byte[] gas = tx.getGasLimit();
@@ -109,9 +109,12 @@ private ProgramInvoke generalInvoke(Transaction tx, int txindex, Repository repo
         /*** GASLIMIT op ***/
         byte[] gaslimit = env.getCurrentGasLimit();
 
+        /*** BASEFEE op ***/
+        Coin minimumGasPrice = block.getMinimumGasPrice();
+
         return new ProgramInvokeImpl(addr.getBytes(), origin.getBytes(), caller.getBytes(), balance.getBytes(),
-                gasPrice.getBytes(), gas, callValue.getBytes(), data, lastHash, coinbase,
-                timestamp, number, txindex, difficulty, gaslimit, repository, blockStore);
+                txGasPrice.getBytes(), gas, callValue.getBytes(), data, lastHash, coinbase,
+                timestamp, number, txindex, difficulty, gaslimit, minimumGasPrice.getBytes(), repository, blockStore);
     }
 
 }
diff --git a/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestRunner.java b/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestRunner.java
index 5d4a7ea3e26..2f01f686168 100644
--- a/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestRunner.java
+++ b/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestRunner.java
@@ -252,7 +252,7 @@ public List<String> runTestCase(TestingCase testCase) {
             byte[] origin = exec.getOrigin();
             byte[] caller = exec.getCaller();
             byte[] balance = ByteUtil.bigIntegerToBytes(repository.getBalance(new RskAddress(exec.getAddress())).asBigInteger());
-            byte[] gasPrice = exec.getGasPrice();
+            byte[] txGasPrice = exec.getGasPrice();
             byte[] gas = exec.getGas();
             byte[] callValue = exec.getValue();
             byte[] msgData = exec.getData();
@@ -262,6 +262,7 @@ public List<String> runTestCase(TestingCase testCase) {
             long number = ByteUtil.byteArrayToLong(env.getCurrentNumber());
             byte[] difficulty = env.getCurrentDifficulty();
             byte[] gaslimit = env.getCurrentGasLimit();
+            byte[] minimumGasPrice = env.getCurrentMinimumGasPrice();
 
             // Origin and caller need to exist in order to be able to execute
             RskAddress originAddress = new RskAddress(origin);
@@ -274,8 +275,8 @@ public List<String> runTestCase(TestingCase testCase) {
             }
 
             ProgramInvoke programInvoke = new ProgramInvokeImpl(address, origin, caller, balance,
-                    gasPrice, gas, callValue, msgData, lastHash, coinbase,
-                    timestamp, number, 0, difficulty, gaslimit, repository, new BlockStoreDummy(), true);
+                    txGasPrice, gas, callValue, msgData, lastHash, coinbase,
+                    timestamp, number, 0, difficulty, gaslimit, minimumGasPrice, repository, new BlockStoreDummy(), true);
 
             /* 3. Create Program - exec.code */
             /* 4. run VM */
diff --git a/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestingCase.java b/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestingCase.java
index d9a2c7f00dd..9276d2b113b 100644
--- a/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestingCase.java
+++ b/rskj-core/src/test/java/org/ethereum/jsontestsuite/TestingCase.java
@@ -26,6 +26,7 @@
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import org.bouncycastle.util.BigIntegers;
 import org.bouncycastle.util.encoders.Hex;
+import org.ethereum.jsontestsuite.builder.EnvBuilder;
 import org.ethereum.util.ByteUtil;
 
 import java.io.IOException;
@@ -128,7 +129,7 @@ public TestingCase(JsonNode testCaseJSONObj) throws IOException {
             }
 
             if (testCaseJSONObj.has("env"))
-              this.env = new Env(envJSON);
+              this.env = EnvBuilder.build(envJSON);
 
             if (testCaseJSONObj.has("exec"))
               this.exec = new Exec(execJSON);
@@ -139,7 +140,7 @@ public TestingCase(JsonNode testCaseJSONObj) throws IOException {
         }
     }
 
-    static BigInteger toBigInt(String s) {
+    public static BigInteger toBigInt(String s) {
         if (s.startsWith("0x")) {
             if (s.equals("0x")) return new BigInteger("0");
             return new BigInteger(s.substring(2), 16);
diff --git a/rskj-core/src/test/java/org/ethereum/jsontestsuite/builder/EnvBuilder.java b/rskj-core/src/test/java/org/ethereum/jsontestsuite/builder/EnvBuilder.java
index 2914d33af47..78e65ab2e85 100644
--- a/rskj-core/src/test/java/org/ethereum/jsontestsuite/builder/EnvBuilder.java
+++ b/rskj-core/src/test/java/org/ethereum/jsontestsuite/builder/EnvBuilder.java
@@ -16,25 +16,57 @@
  * You should have received a copy of the GNU Lesser General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-
 package org.ethereum.jsontestsuite.builder;
 
+import com.fasterxml.jackson.databind.JsonNode;
+import org.bouncycastle.util.encoders.Hex;
 import org.ethereum.jsontestsuite.Env;
 import org.ethereum.jsontestsuite.model.EnvTck;
 
+import static org.bouncycastle.util.BigIntegers.asUnsignedByteArray;
 import static org.ethereum.json.Utils.*;
+import static org.ethereum.jsontestsuite.TestingCase.toBigInt;
 
 public class EnvBuilder {
 
-    public static Env build(EnvTck envTck){
+    public static final String defaultMinimumGasPrice = "0x0050";
+
+    public static Env build(EnvTck envTck) {
         byte[] coinbase = parseData(envTck.getCurrentCoinbase());
         byte[] difficulty = parseVarData(envTck.getCurrentDifficulty());
         byte[] gasLimit = parseVarData(envTck.getCurrentGasLimit());
+        byte[] minimumGasPrice = parseVarData(defaultMinimumGasPrice);
         byte[] number = parseNumericData(envTck.getCurrentNumber());
         byte[] timestamp = parseNumericData(envTck.getCurrentTimestamp());
         byte[] hash = parseData(envTck.getPreviousHash());
 
-        return new Env(coinbase, difficulty, gasLimit, number, timestamp, hash);
+        return new Env(coinbase, difficulty, gasLimit, minimumGasPrice, number, timestamp, hash);
+    }
+
+    /*
+        e.g:
+            "currentCoinbase" : "2adc25665018aa1fe0e6bc666dac8fc2697ff9ba",
+            "currentDifficulty" : "256",
+            "currentGasLimit" : "1000000",
+            "currentMinimumGasPrice" : "777",
+            "currentNumber" : "0",
+            "currentTimestamp" : 1,
+            "previousHash" : "5e20a0453cecd065ea59c37ac63e079ee08998b6045136a8ce6635c7912ec0b6"
+    */
+    public static Env build(JsonNode jsonEnv) {
+        byte[] coinbase = Hex.decode(jsonEnv.get("currentCoinbase").asText());
+        byte[] difficulty = asUnsignedByteArray(toBigInt(jsonEnv.get("currentDifficulty").asText()));
+        byte[] gasLimit = asUnsignedByteArray(toBigInt(parseUnidentifiedBase(jsonEnv.get("currentGasLimit").asText())));
+        byte[] minimumGasPrice = asUnsignedByteArray(toBigInt(parseUnidentifiedBase(defaultMinimumGasPrice)));
+        byte[] number = toBigInt(jsonEnv.get("currentNumber").asText()).toByteArray();
+        byte[] timestamp = toBigInt(jsonEnv.get("currentTimestamp").asText()).toByteArray();
+
+        JsonNode previousHash = jsonEnv.get("previousHash");
+        String prevHash = previousHash == null ? "" : previousHash.asText();
+
+        byte[] hash = Hex.decode(prevHash);
+
+        return new Env(coinbase, difficulty, gasLimit, minimumGasPrice, number, timestamp, hash);
     }
 
 }
diff --git a/rskj-core/src/test/java/org/ethereum/vm/VMTest.java b/rskj-core/src/test/java/org/ethereum/vm/VMTest.java
index 3c404d6d736..0f9e95cd2fb 100644
--- a/rskj-core/src/test/java/org/ethereum/vm/VMTest.java
+++ b/rskj-core/src/test/java/org/ethereum/vm/VMTest.java
@@ -3366,6 +3366,20 @@ void testScriptVersion3() {
         }
     }
 
+    @Test
+    void testBASEFEE() {
+        // Given
+        program = getProgram(compile("BASEFEE"));
+        when(program.getActivations().isActive(ConsensusRule.RSKIP412)).thenReturn(true);
+
+        // When
+        program.fullTrace();
+        vm.step(program);
+
+        // Then (See ProgramInvokeMockImpl.getMinimumGasPrice())
+        assertEquals("000000000000000000000000000000000000000000000000000003104e60a000", ByteUtil.toHexString(program.getStack().peek().getData()));
+    }
+
     private VM getSubject() {
         return new VM(vmConfig, precompiledContracts);
     }
diff --git a/rskj-core/src/test/java/org/ethereum/vm/program/ProgramInvokeImplTest.java b/rskj-core/src/test/java/org/ethereum/vm/program/ProgramInvokeImplTest.java
index 43e68746e57..27127f5cede 100644
--- a/rskj-core/src/test/java/org/ethereum/vm/program/ProgramInvokeImplTest.java
+++ b/rskj-core/src/test/java/org/ethereum/vm/program/ProgramInvokeImplTest.java
@@ -32,6 +32,7 @@ void testEquals_OK() {
         int transactionIndex1 = 3;
         byte[] difficulty1 = new byte[]{11};
         byte[] gasLimit1 = new byte[]{12};
+        byte[] minimumGasPrice1 = new byte[]{13};
         Repository repository1 = RepositoryBuilder.build(Collections.emptyMap());
         BlockStore blockStore1 = new BlockStoreDummy();
         boolean byTestingSuite1 = true;
@@ -51,13 +52,14 @@ void testEquals_OK() {
         int transactionIndex2 = 2;
         byte[] difficulty2 = new byte[]{2};
         byte[] gasLimit2 = new byte[]{1};
+        byte[] minimumGasPrice2 = new byte[]{14};
         Repository repository2 = null;
         BlockStore blockStore2 = null;
         boolean byTestingSuite2 = false;
 
         // An object must be equal to itself
 
-        ProgramInvokeImpl programInvokeA = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, repository1, blockStore1, byTestingSuite1);
+        ProgramInvokeImpl programInvokeA = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, minimumGasPrice1, repository1, blockStore1, byTestingSuite1);
 
         assertEquals(programInvokeA, programInvokeA);
 
@@ -67,15 +69,15 @@ void testEquals_OK() {
 
         // Same property values make objects to be equal
 
-        ProgramInvokeImpl programInvokeB = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, repository1, blockStore1, byTestingSuite1);
+        ProgramInvokeImpl programInvokeB = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, minimumGasPrice1, repository1, blockStore1, byTestingSuite1);
 
         assertEquals(programInvokeA, programInvokeB);
 
         // Different combinations of property values make objects to be different
 
-        ProgramInvokeImpl programInvokeC = new ProgramInvokeImpl(address2, origin2, caller2, balance2, gasPrice2, gas2, callValue2, msgData2, lastHash2, coinbase2, timestamp2, number2, transactionIndex2, difficulty2, gasLimit2, repository2, blockStore2, byTestingSuite2);
-        ProgramInvokeImpl programInvokeD = new ProgramInvokeImpl(address2, origin2, caller2, balance1, gasPrice2, gas2, callValue2, msgData2, lastHash2, coinbase2, timestamp2, number1, transactionIndex2, difficulty2, gasLimit2, repository2, blockStore2, byTestingSuite2);
-        ProgramInvokeImpl programInvokeE = new ProgramInvokeImpl(address2, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, repository1, blockStore1, byTestingSuite1);
+        ProgramInvokeImpl programInvokeC = new ProgramInvokeImpl(address2, origin2, caller2, balance2, gasPrice2, gas2, callValue2, msgData2, lastHash2, coinbase2, timestamp2, number2, transactionIndex2, difficulty2, gasLimit2, minimumGasPrice2, repository2, blockStore2, byTestingSuite2);
+        ProgramInvokeImpl programInvokeD = new ProgramInvokeImpl(address2, origin2, caller2, balance1, gasPrice2, gas2, callValue2, msgData2, lastHash2, coinbase2, timestamp2, number1, transactionIndex2, difficulty2, gasLimit2, minimumGasPrice2, repository2, blockStore2, byTestingSuite2);
+        ProgramInvokeImpl programInvokeE = new ProgramInvokeImpl(address2, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, minimumGasPrice1, repository1, blockStore1, byTestingSuite1);
 
         assertNotEquals(programInvokeA, programInvokeC);
         assertNotEquals(programInvokeA, programInvokeD);
@@ -103,6 +105,7 @@ void testHashcode_OK() {
         int transactionIndex1 = 3;
         byte[] difficulty1 = new byte[]{11};
         byte[] gasLimit1 = new byte[]{12};
+        byte[] minimumGasPrice1 = new byte[]{13};
         Repository repository1 = RepositoryBuilder.build(Collections.emptyMap());
         BlockStore blockStore1 = new BlockStoreDummy();
         boolean byTestingSuite1 = true;
@@ -122,20 +125,21 @@ void testHashcode_OK() {
         int transactionIndex2 = 2;
         byte[] difficulty2 = new byte[]{2};
         byte[] gasLimit2 = new byte[]{1};
+        byte[] minimumGasPrice2 = new byte[]{14};
         Repository repository2 = null;
         BlockStore blockStore2 = null;
         boolean byTestingSuite2 = false;
 
         // Same properties included in the hashcode makes hashcode to be equal
 
-        ProgramInvokeImpl programInvokeA = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, repository1, blockStore1, byTestingSuite1);
-        ProgramInvokeImpl programInvokeB = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, repository1, blockStore1, byTestingSuite1);
+        ProgramInvokeImpl programInvokeA = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, minimumGasPrice1, repository1, blockStore1, byTestingSuite1);
+        ProgramInvokeImpl programInvokeB = new ProgramInvokeImpl(address1, origin1, caller1, balance1, gasPrice1, gas1, callValue1, msgData1, lastHash1, coinbase1, timestamp1, number1, transactionIndex1, difficulty1, gasLimit1, minimumGasPrice1, repository1, blockStore1, byTestingSuite1);
 
         assertEquals(programInvokeA.hashCode(), programInvokeB.hashCode());
 
         // Different combinations of property values makes hashcode to be different
 
-        ProgramInvokeImpl programInvokeC = new ProgramInvokeImpl(address2, origin2, caller2, balance2, gasPrice2, gas2, callValue2, msgData2, lastHash2, coinbase2, timestamp2, number2, transactionIndex2, difficulty2, gasLimit2, repository2, blockStore2, byTestingSuite2);
+        ProgramInvokeImpl programInvokeC = new ProgramInvokeImpl(address2, origin2, caller2, balance2, gasPrice2, gas2, callValue2, msgData2, lastHash2, coinbase2, timestamp2, number2, transactionIndex2, difficulty2, gasLimit2, minimumGasPrice2, repository2, blockStore2, byTestingSuite2);
 
         assertNotEquals(programInvokeA.hashCode(), programInvokeC.hashCode());
 
diff --git a/rskj-core/src/test/java/org/ethereum/vm/program/invoke/ProgramInvokeMockImpl.java b/rskj-core/src/test/java/org/ethereum/vm/program/invoke/ProgramInvokeMockImpl.java
index 89123900667..f9377f33a65 100644
--- a/rskj-core/src/test/java/org/ethereum/vm/program/invoke/ProgramInvokeMockImpl.java
+++ b/rskj-core/src/test/java/org/ethereum/vm/program/invoke/ProgramInvokeMockImpl.java
@@ -96,17 +96,20 @@ public ProgramInvokeMockImpl(boolean defaults) {
     }
 
     /*           ADDRESS op         */
+    @Override
     public DataWord getOwnerAddress() {
         return DataWord.valueOf(ownerAddress.getBytes());
     }
 
     /*           BALANCE op         */
+    @Override
     public DataWord getBalance() {
         byte[] balance = Hex.decode("0DE0B6B3A7640000");
         return DataWord.valueOf(balance);
     }
 
     /*           ORIGIN op         */
+    @Override
     public DataWord getOriginAddress() {
 
         byte[] cowPrivKey = HashUtil.keccak256("horse".getBytes(StandardCharsets.UTF_8));
@@ -116,6 +119,7 @@ public DataWord getOriginAddress() {
     }
 
     /*           CALLER op         */
+    @Override
     public DataWord getCallerAddress() {
 
         byte[] cowPrivKey = HashUtil.keccak256("monkey".getBytes(StandardCharsets.UTF_8));
@@ -125,23 +129,33 @@ public DataWord getCallerAddress() {
     }
 
     /*           GASPRICE op       */
-    public DataWord getMinGasPrice() {
+    @Override
+    public DataWord getTxGasPrice() {
 
-        byte[] minGasPrice = Hex.decode("09184e72a000");
-        return DataWord.valueOf(minGasPrice);
+        byte[] txGasPrice = Hex.decode("09184e72a000");
+        return DataWord.valueOf(txGasPrice);
     }
 
     /*           GAS op       */
+    @Override
     public long  getGas() {
 
         return gasLimit;
     }
 
+    /*           BASEFEE op       */
+    @Override
+    public DataWord getMinimumGasPrice() {
+        byte[] minimumGasPrice = Hex.decode("03104e60a000");
+        return DataWord.valueOf(minimumGasPrice);
+    }
+
     public void setGas(long gasLimit) {
         this.gasLimit = gasLimit;
     }
 
     /*          CALLVALUE op    */
+    @Override
     public DataWord getCallValue() {
         byte[] balance = Hex.decode("0DE0B6B3A7640000");
         return DataWord.valueOf(balance);
@@ -154,6 +168,7 @@ public DataWord getCallValue() {
      */
 
     /*     CALLDATALOAD  op   */
+    @Override
     public DataWord getDataValue(DataWord indexData) {
 
         byte[] data = new byte[32];
@@ -171,6 +186,7 @@ public DataWord getDataValue(DataWord indexData) {
     }
 
     /*  CALLDATASIZE */
+    @Override
     public DataWord getDataSize() {
 
         if (msgData == null || msgData.length == 0) return DataWord.valueOf(new byte[32]);
@@ -179,6 +195,7 @@ public DataWord getDataSize() {
     }
 
     /*  CALLDATACOPY */
+    @Override
     public byte[] getDataCopy(DataWord offsetData, DataWord lengthData) {
 
         int offset = offsetData.value().intValue();
diff --git a/rskj-core/src/test/resources/dsl/opcode/basefee/baseFeeActivatedTest.txt b/rskj-core/src/test/resources/dsl/opcode/basefee/baseFeeActivatedTest.txt
new file mode 100644
index 00000000000..5cc27c797c6
--- /dev/null
+++ b/rskj-core/src/test/resources/dsl/opcode/basefee/baseFeeActivatedTest.txt
@@ -0,0 +1,122 @@
+comment
+
+// CONTRACT CODE
+
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.20;
+
+contract TestBasefee {
+    constructor() {}
+
+    event OK();
+    event ERROR();
+
+    function checkBasefee(uint256 expected) external {
+        if (block.basefee == expected) {
+            emit OK();
+        } else {
+            emit ERROR();
+        }
+    }
+}
+
+// DESCRIPTION
+
+This contract compares an expected value against the block basefee:
+    - If block basefee matches the expected value, then the OK event is emmited
+    - ERROR event is emmited otherwise.
+
+// CONTRACT BYTECODE
+
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
+
+// CONTRACT CALLS
+
+- checkBasefee(0) // Should emit "OK" as this is the minimum gas price on test
+
+    6b11a75f0000000000000000000000000000000000000000000000000000000000000000
+
+- checkBasefee(1) // Should emit "ERROR" as it is not the minimum gas price
+
+    6b11a75f0000000000000000000000000000000000000000000000000000000000000001
+
+end
+
+# Create and fund new account
+account_new acc1 10000000
+
+# Create transaction to deploy TestBasefee contract
+transaction_build txTestBasefee
+    sender acc1
+    receiverAddress 00
+    value 0
+    data 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
+    gas 1200000
+    build
+
+# Create block to hold txTestBasefee transaction
+block_build b01
+    parent g00
+    transactions txTestBasefee
+    build
+
+# Connect block
+block_connect b01
+
+# Check b01 is best block
+assert_best b01
+
+# Check txTestBasefee succeded
+assert_tx_success txTestBasefee
+
+# Create transaction to execute testBasefee(0) method
+transaction_build txTestBasefeeOKCall
+    sender acc1
+    nonce 1
+    contract txTestBasefee
+    value 0
+    data 6b11a75f0000000000000000000000000000000000000000000000000000000000000000
+    gas 30000
+    build
+
+# Create block to hold txTestBasefeeOKCall transaction
+block_build b02
+    parent b01
+    transactions txTestBasefeeOKCall
+    gasLimit 6500000
+    build
+
+# Connect block
+block_connect b02
+
+# Check b02 is best block
+assert_best b02
+
+# Check txTestBasefeeOKCall succeded
+assert_tx_success txTestBasefeeOKCall
+
+# Create transaction to execute testBasefee(1) method
+transaction_build txTestBasefeeErrorCall
+    sender acc1
+    nonce 2
+    contract txTestBasefee
+    value 0
+    data 6b11a75f0000000000000000000000000000000000000000000000000000000000000001
+    gas 30000
+    build
+
+# Create block to hold txTestBasefeeErrorCall transaction
+block_build b03
+    parent b02
+    transactions txTestBasefeeErrorCall
+    gasLimit 6500000
+    build
+
+# Connect block
+block_connect b03
+
+# Check b03 is best block
+assert_best b03
+
+# Check txTestBasefeeErrorCall succeded
+assert_tx_success txTestBasefeeErrorCall
\ No newline at end of file
diff --git a/rskj-core/src/test/resources/dsl/opcode/basefee/baseFeeNotActivatedTest.txt b/rskj-core/src/test/resources/dsl/opcode/basefee/baseFeeNotActivatedTest.txt
new file mode 100644
index 00000000000..6ce240f312e
--- /dev/null
+++ b/rskj-core/src/test/resources/dsl/opcode/basefee/baseFeeNotActivatedTest.txt
@@ -0,0 +1,89 @@
+comment
+
+// CONTRACT CODE
+
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.20;
+
+contract TestBasefee {
+    constructor() {}
+
+    event OK();
+    event ERROR();
+
+    function checkBasefee(uint256 expected) external {
+        if (block.basefee == expected) {
+            emit OK();
+        } else {
+            emit ERROR();
+        }
+    }
+}
+
+// DESCRIPTION
+
+This contract compares an expected value against the block basefee:
+    - If block basefee matches the expected value, then the OK event is emmited
+    - ERROR event is emmited otherwise.
+
+// CONTRACT BYTECODE
+
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
+
+// CONTRACT CALL
+
+- checkBasefee(0) // Param doesn't matter in this case, so we picked 0 (lazy? XD)
+
+    6b11a75f0000000000000000000000000000000000000000000000000000000000000000
+
+end
+
+# Create and fund new account
+account_new acc1 10000000
+
+# Create transaction to deploy TestBasefee contract
+transaction_build txTestBasefee
+    sender acc1
+    receiverAddress 00
+    value 0
+    data 608060405234801561000f575f80fd5b506101498061001d5f395ff3fe608060405234801561000f575f80fd5b5060043610610029575f3560e01c80636b11a75f1461002d575b5f80fd5b610047600480360381019061004291906100e8565b610049565b005b804803610081577fd48fe2800bace8f5ca2450feacbd6efc681b1cd0115019bb49fa529b6171bf6760405160405180910390a16100ae565b7f1c9c433b57013295d61f5c5738f5e2cb1de70bb5ba5b2896edfa8efae345965e60405160405180910390a15b50565b5f80fd5b5f819050919050565b6100c7816100b5565b81146100d1575f80fd5b50565b5f813590506100e2816100be565b92915050565b5f602082840312156100fd576100fc6100b1565b5b5f61010a848285016100d4565b9150509291505056fea2646970667358221220af033c2d8dcac1c830549d1c3144ac62d2ce6d74e5363841f42152caab9ec22a64736f6c63430008170033
+    gas 1200000
+    build
+
+# Create block to hold txTestBasefee transaction
+block_build b01
+    parent g00
+    transactions txTestBasefee
+    build
+
+# Connect block
+block_connect b01
+
+# Check b01 is best block
+assert_best b01
+
+# Check txTestBasefee succeded
+assert_tx_success txTestBasefee
+
+# Create transaction to execute testBasefee(0) method
+transaction_build txTestBasefeeNotActivated
+    sender acc1
+    nonce 1
+    contract txTestBasefee
+    value 0
+    data 6b11a75f0000000000000000000000000000000000000000000000000000000000000000
+    gas 30000
+    build
+
+# Create block to hold txTestBasefeeNotActivated transaction
+block_build b02
+    parent b01
+    transactions txTestBasefeeNotActivated
+    gasLimit 6500000
+    build
+
+# Connect block
+block_connect b02
+
+# Check b02 is best block
+assert_best b02
\ No newline at end of file