diff --git a/core/types/block.go b/core/types/block.go
index dc53b1df06..a792bcf9fe 100644
--- a/core/types/block.go
+++ b/core/types/block.go
@@ -85,7 +85,11 @@ type Header struct {
 	Nonce       BlockNonce     `json:"nonce"`
 
 	// BaseFee was added by EIP-1559 and is ignored in legacy headers.
-		BaseFee *big.Int `json:"baseFeePerGas" rlp:"optional"`
+	BaseFee *big.Int           `json:"baseFeePerGas" rlp:"optional"`
+	// Codeword was added by Worldlandhardfork and is ignored in legacy headers.
+	Codeword []byte            `json:"codeword" rlp:"optional"`
+	// CodeLength was added by Worldlandhardfork and is ignored in legacy headers.
+	CodeLength uint64          `json:"codelength" rlp:"optional"`
 
 	/*
 		TODO (MariusVanDerWijden) Add this field once needed
@@ -103,6 +107,8 @@ type headerMarshaling struct {
 	Time       hexutil.Uint64
 	Extra      hexutil.Bytes
 	BaseFee    *hexutil.Big
+	//Codeword   hexutil.Bytes
+	//CodeLength hexutil.Uint64
 	Hash       common.Hash `json:"hash"` // adds call to Hash() in MarshalJSON
 }
 
@@ -117,6 +123,7 @@ var headerSize = common.StorageSize(reflect.TypeOf(Header{}).Size())
 // Size returns the approximate memory used by all internal contents. It is used
 // to approximate and limit the memory consumption of various caches.
 func (h *Header) Size() common.StorageSize {
+	//return headerSize + common.StorageSize(len(h.Codeword)+len(h.Extra)+(h.Difficulty.BitLen()+h.Number.BitLen())/8)
 	return headerSize + common.StorageSize(len(h.Extra)+(h.Difficulty.BitLen()+h.Number.BitLen())/8)
 }
 
@@ -141,6 +148,9 @@ func (h *Header) SanityCheck() error {
 			return fmt.Errorf("too large base fee: bitlen %d", bfLen)
 		}
 	}
+
+	//maybe add codeword?
+
 	return nil
 }
 
@@ -248,6 +258,13 @@ func CopyHeader(h *Header) *Header {
 		cpy.Extra = make([]byte, len(h.Extra))
 		copy(cpy.Extra, h.Extra)
 	}
+	/*if len(h.Codeword) > 0 {
+		cpy.Codeword = make([]byte, len(h.Codeword))
+		copy(cpy.Codeword, h.Codeword)
+	}
+	if h.CodeLength != nil {
+		cpy.BaseFee = new(big.Int).Set(h.CodeLength)
+	}*/
 	return &cpy
 }
 
@@ -304,6 +321,17 @@ func (b *Block) ReceiptHash() common.Hash { return b.header.ReceiptHash }
 func (b *Block) UncleHash() common.Hash   { return b.header.UncleHash }
 func (b *Block) Extra() []byte            { return common.CopyBytes(b.header.Extra) }
 
+func (b *Block) Codeword() []byte { 
+	if b.header.Codeword == nil {
+		return nil
+	}
+	return common.CopyBytes(b.header.Codeword) 
+}
+
+func (b *Block) CodeLength() uint64 { 
+	return b.header.CodeLength
+}
+
 func (b *Block) BaseFee() *big.Int {
 	if b.header.BaseFee == nil {
 		return nil
diff --git a/core/types/gen_header_json.go b/core/types/gen_header_json.go
index ce36aad320..c116aac24b 100644
--- a/core/types/gen_header_json.go
+++ b/core/types/gen_header_json.go
@@ -31,8 +31,11 @@ func (h Header) MarshalJSON() ([]byte, error) {
 		Extra       hexutil.Bytes  `json:"extraData"        gencodec:"required"`
 		MixDigest   common.Hash    `json:"mixHash"`
 		Nonce       BlockNonce     `json:"nonce"`
-		BaseFee     *hexutil.Big   `json:"baseFeePerGas" rlp:"optional"`
+		BaseFee     *hexutil.Big   `json:"baseFeePerGas"    rlp:"optional"`
 		Hash        common.Hash    `json:"hash"`
+		Codeword    hexutil.Bytes  `json:"codeword"         rlp:"optional"`
+		CodeLength  hexutil.Uint64 `json:"codelength"       rlp:"optional"`
+		
 	}
 	var enc Header
 	enc.ParentHash = h.ParentHash
@@ -52,6 +55,8 @@ func (h Header) MarshalJSON() ([]byte, error) {
 	enc.Nonce = h.Nonce
 	enc.BaseFee = (*hexutil.Big)(h.BaseFee)
 	enc.Hash = h.Hash()
+	enc.Codeword = h.Codeword
+	enc.CodeLength = hexutil.Uint64(h.CodeLength)
 	return json.Marshal(&enc)
 }
 
@@ -73,7 +78,9 @@ func (h *Header) UnmarshalJSON(input []byte) error {
 		Extra       *hexutil.Bytes  `json:"extraData"        gencodec:"required"`
 		MixDigest   *common.Hash    `json:"mixHash"`
 		Nonce       *BlockNonce     `json:"nonce"`
-		BaseFee     *hexutil.Big    `json:"baseFeePerGas" rlp:"optional"`
+		BaseFee     *hexutil.Big    `json:"baseFeePerGas"    rlp:"optional"`
+		Codeword    *hexutil.Bytes  `json:"codeword"         rlp:"optional"`
+		CodeLength  *hexutil.Uint64 `json:"codelength"       rlp:"optional"`
 	}
 	var dec Header
 	if err := json.Unmarshal(input, &dec); err != nil {
@@ -139,5 +146,12 @@ func (h *Header) UnmarshalJSON(input []byte) error {
 	if dec.BaseFee != nil {
 		h.BaseFee = (*big.Int)(dec.BaseFee)
 	}
+	if dec.Codeword == nil {
+		h.Codeword = *dec.Codeword
+	}
+	if dec.CodeLength == nil {
+		h.CodeLength = uint64(*dec.CodeLength)
+	}
+
 	return nil
 }
diff --git a/core/types/gen_header_rlp.go b/core/types/gen_header_rlp.go
index 36d246ee9a..41ae26e970 100644
--- a/core/types/gen_header_rlp.go
+++ b/core/types/gen_header_rlp.go
@@ -34,6 +34,7 @@ func (obj *Header) EncodeRLP(_w io.Writer) error {
 		}
 		w.WriteBigInt(obj.Number)
 	}
+
 	w.WriteUint64(obj.GasLimit)
 	w.WriteUint64(obj.GasUsed)
 	w.WriteUint64(obj.Time)
@@ -51,6 +52,17 @@ func (obj *Header) EncodeRLP(_w io.Writer) error {
 			w.WriteBigInt(obj.BaseFee)
 		}
 	}
+	_tmp2 := obj.Codeword != nil
+	if _tmp2 {
+		if obj.Codeword == nil {
+			w.Write(rlp.EmptyString)
+		} else {
+			w.WriteBytes(obj.Codeword)
+		}
+	}
+	if obj.CodeLength != 0 {
+		w.WriteUint64(obj.CodeLength)
+	}
 	w.ListEnd(_tmp0)
 	return w.Flush()
 }