diff --git a/cmd/puppeth/genesis.go b/cmd/puppeth/genesis.go
index ef1f977bf09f..683bc9fea004 100644
--- a/cmd/puppeth/genesis.go
+++ b/cmd/puppeth/genesis.go
@@ -417,7 +417,7 @@ func newParityChainSpec(network string, genesis *core.Genesis, bootnodes []strin
 	spec.Params.GasLimitBoundDivisor = (math2.HexOrDecimal64)(params.GasLimitBoundDivisor)
 	spec.Params.NetworkID = (hexutil.Uint64)(genesis.Config.ChainID.Uint64())
 	spec.Params.ChainID = (hexutil.Uint64)(genesis.Config.ChainID.Uint64())
-	spec.Params.MaxCodeSize = params.MaxCodeSize
+	spec.Params.MaxCodeSize = params.MaxCodeSizeHard
 	// geth has it set from zero
 	spec.Params.MaxCodeSizeTransition = 0
 
diff --git a/core/rawdb/accessors_state.go b/core/rawdb/accessors_state.go
index 8f478d2597ca..730cb001563f 100644
--- a/core/rawdb/accessors_state.go
+++ b/core/rawdb/accessors_state.go
@@ -17,6 +17,8 @@
 package rawdb
 
 import (
+	"encoding/binary"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/log"
@@ -61,6 +63,16 @@ func ReadCodeWithPrefix(db ethdb.KeyValueReader, hash common.Hash) []byte {
 	return data
 }
 
+// ReadCodeSize retrieves the contract code size of the provided code hash.
+// Return 0 if not found
+func ReadCodeSize(db ethdb.KeyValueReader, hash common.Hash) int {
+	data, _ := db.Get(codeSizeKey(hash))
+	if len(data) != 4 {
+		return 0
+	}
+	return int(binary.BigEndian.Uint32(data))
+}
+
 // HasCodeWithPrefix checks if the contract code corresponding to the
 // provided code hash is present in the db. This function will only check
 // presence using the prefix-scheme.
@@ -74,6 +86,12 @@ func WriteCode(db ethdb.KeyValueWriter, hash common.Hash, code []byte) {
 	if err := db.Put(codeKey(hash), code); err != nil {
 		log.Crit("Failed to store contract code", "err", err)
 	}
+
+	var sizeData [4]byte
+	binary.BigEndian.PutUint32(sizeData[:], uint32(len(code)))
+	if err := db.Put(codeSizeKey(hash), sizeData[:]); err != nil {
+		log.Crit("Failed to store contract code size", "err", err)
+	}
 }
 
 // DeleteCode deletes the specified contract code from the database.
diff --git a/core/rawdb/schema.go b/core/rawdb/schema.go
index b35fcba45f79..f4e378ead501 100644
--- a/core/rawdb/schema.go
+++ b/core/rawdb/schema.go
@@ -92,6 +92,7 @@ var (
 	SnapshotAccountPrefix = []byte("a") // SnapshotAccountPrefix + account hash -> account trie value
 	SnapshotStoragePrefix = []byte("o") // SnapshotStoragePrefix + account hash + storage hash -> storage trie value
 	CodePrefix            = []byte("c") // CodePrefix + code hash -> account code
+	CodeSizePrefix        = []byte("s") // CodePrefixSize
 
 	PreimagePrefix = []byte("secure-key-")      // PreimagePrefix + hash -> preimage
 	configPrefix   = []byte("ethereum-config-") // config prefix for the db
@@ -220,6 +221,10 @@ func codeKey(hash common.Hash) []byte {
 	return append(CodePrefix, hash.Bytes()...)
 }
 
+func codeSizeKey(hash common.Hash) []byte {
+	return append(CodeSizePrefix, hash.Bytes()...)
+}
+
 // IsCodeKey reports whether the given byte slice is the key of contract code,
 // if so return the raw code hash as well.
 func IsCodeKey(key []byte) (bool, []byte) {
diff --git a/core/state/database.go b/core/state/database.go
index bbcd2358e5b8..7445e627f90e 100644
--- a/core/state/database.go
+++ b/core/state/database.go
@@ -194,6 +194,12 @@ func (db *cachingDB) ContractCodeSize(addrHash, codeHash common.Hash) (int, erro
 	if cached, ok := db.codeSizeCache.Get(codeHash); ok {
 		return cached.(int), nil
 	}
+
+	size := rawdb.ReadCodeSize(db.db.DiskDB(), codeHash)
+	if size != 0 {
+		return size, nil
+	}
+
 	code, err := db.ContractCode(addrHash, codeHash)
 	return len(code), err
 }
diff --git a/core/tx_pool.go b/core/tx_pool.go
index 3329d736a37f..9294416ef02a 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -50,7 +50,7 @@ const (
 	// non-trivial consequences: larger transactions are significantly harder and
 	// more expensive to propagate; larger transactions also take more resources
 	// to validate whether they fit into the pool or not.
-	txMaxSize = 4 * txSlotSize // 128KB
+	txMaxSize = 16 * txSlotSize // 512KB (tentative)
 )
 
 var (
diff --git a/core/vm/errors.go b/core/vm/errors.go
index 004f8ef1c83c..16b03383adfe 100644
--- a/core/vm/errors.go
+++ b/core/vm/errors.go
@@ -36,6 +36,7 @@ var (
 	ErrGasUintOverflow          = errors.New("gas uint64 overflow")
 	ErrInvalidCode              = errors.New("invalid code: must not begin with 0xef")
 	ErrNonceUintOverflow        = errors.New("nonce uint64 overflow")
+	ErrCodeInsufficientStake    = errors.New("insufficient staking for code")
 
 	// errStopToken is an internal token indicating interpreter loop termination,
 	// never returned to outside callers.
diff --git a/core/vm/evm.go b/core/vm/evm.go
index dd55618bf812..8af230160af5 100644
--- a/core/vm/evm.go
+++ b/core/vm/evm.go
@@ -227,6 +227,10 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
 			contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), code)
 			ret, err = evm.interpreter.Run(contract, input, false)
 			gas = contract.Gas
+
+			if err == nil {
+				err = evm.checkContractStaking(contract, uint64(len(code)))
+			}
 		}
 	}
 	// When an error was returned by the EVM or when setting the creation code
@@ -284,6 +288,10 @@ func (evm *EVM) CallCode(caller ContractRef, addr common.Address, input []byte,
 		contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy))
 		ret, err = evm.interpreter.Run(contract, input, false)
 		gas = contract.Gas
+
+		if err == nil {
+			err = evm.checkContractStaking(contract, 0)
+		}
 	}
 	if err != nil {
 		evm.StateDB.RevertToSnapshot(snapshot)
@@ -324,6 +332,10 @@ func (evm *EVM) DelegateCall(caller ContractRef, addr common.Address, input []by
 		contract.SetCallCode(&addrCopy, evm.StateDB.GetCodeHash(addrCopy), evm.StateDB.GetCode(addrCopy))
 		ret, err = evm.interpreter.Run(contract, input, false)
 		gas = contract.Gas
+
+		if err == nil {
+			err = evm.checkContractStaking(contract, 0)
+		}
 	}
 	if err != nil {
 		evm.StateDB.RevertToSnapshot(snapshot)
@@ -390,6 +402,22 @@ func (evm *EVM) StaticCall(caller ContractRef, addr common.Address, input []byte
 	return ret, gas, err
 }
 
+func (evm *EVM) checkContractStaking(contract *Contract, codeSize uint64) error {
+	if codeSize == 0 {
+		codeSize = uint64(evm.StateDB.GetCodeSize(contract.Address()))
+	}
+	// Check if the remaining balance of the contract can cover the staking requirement
+	if !evm.StateDB.HasSuicided(contract.Address()) && codeSize > params.MaxCodeSizeSoft {
+		staking := big.NewInt(int64((codeSize - 1) / params.ExtcodeCopyChunkSize))
+		staking.Mul(staking, big.NewInt(int64(params.CodeStakingPerChunk)))
+
+		if !evm.Context.CanTransfer(evm.StateDB, contract.Address(), staking) {
+			return ErrCodeInsufficientStake
+		}
+	}
+	return nil
+}
+
 type codeAndHash struct {
 	code []byte
 	hash common.Hash
@@ -453,7 +481,7 @@ func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64,
 	ret, err := evm.interpreter.Run(contract, nil, false)
 
 	// Check whether the max code size has been exceeded, assign err if the case.
-	if err == nil && evm.chainRules.IsEIP158 && len(ret) > params.MaxCodeSize {
+	if err == nil && evm.chainRules.IsEIP158 && len(ret) > params.MaxCodeSizeHard {
 		err = ErrMaxCodeSizeExceeded
 	}
 
@@ -467,12 +495,24 @@ func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64,
 	// be stored due to not enough gas set an error and let it be handled
 	// by the error checking condition below.
 	if err == nil {
-		createDataGas := uint64(len(ret)) * params.CreateDataGas
+		// Be compatible with Ethereum gas metering when code size < 24 * 1024
+		baseDataGas := params.CreateDataGas
+		dataLen := uint64(len(ret))
+		createDataGas := dataLen * baseDataGas
+		// cap the data len and require staking for > 24KB data
+		if dataLen > params.MaxCodeSizeSoft {
+			createDataGas = params.MaxCodeSizeSoft * baseDataGas
+		}
+
 		if contract.UseGas(createDataGas) {
 			evm.StateDB.SetCode(address, ret)
 		} else {
 			err = ErrCodeStoreOutOfGas
 		}
+
+		if err == nil {
+			err = evm.checkContractStaking(contract, dataLen)
+		}
 	}
 
 	// When an error was returned by the EVM or when setting the creation code
diff --git a/core/vm/gas_table.go b/core/vm/gas_table.go
index 4c2cb3e5cf79..8192b0a909c8 100644
--- a/core/vm/gas_table.go
+++ b/core/vm/gas_table.go
@@ -325,6 +325,16 @@ func gasExpEIP158(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memor
 	return gas, nil
 }
 
+func addGasExtraCodeSize(evm *EVM, address common.Address, gas uint64) (uint64, bool) {
+	codeSize := evm.StateDB.GetCodeSize(address)
+	if codeSize <= params.MaxCodeSizeSoft {
+		return gas, false
+	}
+
+	extraGas := (uint64(codeSize) - 1) / params.ExtcodeCopyChunkSize * params.CallGasEIP150
+	return math.SafeAdd(gas, extraGas)
+}
+
 func gasCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
 	var (
 		gas            uint64
@@ -357,6 +367,10 @@ func gasCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize
 	if gas, overflow = math.SafeAdd(gas, evm.callGasTemp); overflow {
 		return 0, ErrGasUintOverflow
 	}
+
+	if gas, overflow = addGasExtraCodeSize(evm, address, gas); overflow {
+		return 0, ErrGasUintOverflow
+	}
 	return gas, nil
 }
 
@@ -368,6 +382,7 @@ func gasCallCode(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memory
 	var (
 		gas      uint64
 		overflow bool
+		address  = common.Address(stack.Back(1).Bytes20())
 	)
 	if stack.Back(2).Sign() != 0 {
 		gas += params.CallValueTransferGas
@@ -382,10 +397,14 @@ func gasCallCode(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memory
 	if gas, overflow = math.SafeAdd(gas, evm.callGasTemp); overflow {
 		return 0, ErrGasUintOverflow
 	}
+	if gas, overflow = addGasExtraCodeSize(evm, address, gas); overflow {
+		return 0, ErrGasUintOverflow
+	}
 	return gas, nil
 }
 
 func gasDelegateCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
+	address := common.Address(stack.Back(1).Bytes20())
 	gas, err := memoryGasCost(mem, memorySize)
 	if err != nil {
 		return 0, err
@@ -398,10 +417,14 @@ func gasDelegateCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, me
 	if gas, overflow = math.SafeAdd(gas, evm.callGasTemp); overflow {
 		return 0, ErrGasUintOverflow
 	}
+	if gas, overflow = addGasExtraCodeSize(evm, address, gas); overflow {
+		return 0, ErrGasUintOverflow
+	}
 	return gas, nil
 }
 
 func gasStaticCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memorySize uint64) (uint64, error) {
+	address := common.Address(stack.Back(1).Bytes20())
 	gas, err := memoryGasCost(mem, memorySize)
 	if err != nil {
 		return 0, err
@@ -414,6 +437,9 @@ func gasStaticCall(evm *EVM, contract *Contract, stack *Stack, mem *Memory, memo
 	if gas, overflow = math.SafeAdd(gas, evm.callGasTemp); overflow {
 		return 0, ErrGasUintOverflow
 	}
+	if gas, overflow = addGasExtraCodeSize(evm, address, gas); overflow {
+		return 0, ErrGasUintOverflow
+	}
 	return gas, nil
 }
 
diff --git a/core/vm/instructions.go b/core/vm/instructions.go
index db507c481100..196d230819f7 100644
--- a/core/vm/instructions.go
+++ b/core/vm/instructions.go
@@ -383,6 +383,13 @@ func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext)
 		uint64CodeOffset = 0xffffffffffffffff
 	}
 	addr := common.Address(a.Bytes20())
+	codeSize := interpreter.evm.StateDB.GetCodeSize(addr)
+	if codeSize > params.MaxCodeSizeSoft {
+		extraGas := (uint64(codeSize - 1)) / params.ExtcodeCopyChunkSize * params.ExtcodeCopyBasePerChunk
+		if !scope.Contract.UseGas(extraGas) {
+			return nil, ErrOutOfGas
+		}
+	}
 	codeCopy := getData(interpreter.evm.StateDB.GetCode(addr), uint64CodeOffset, length.Uint64())
 	scope.Memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy)
 
diff --git a/params/protocol_params.go b/params/protocol_params.go
index 5f154597a7fa..29cc73b84cf7 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -113,6 +113,10 @@ const (
 	// static portion of the gas. It was changed during EIP 150 (Tangerine)
 	ExtcodeCopyBaseFrontier uint64 = 20
 	ExtcodeCopyBaseEIP150   uint64 = 700
+	ExtcodeCopyBasePerChunk uint64 = 700
+	ExtcodeCopyChunkSize    uint64 = MaxCodeSizeSoft
+
+	CodeStakingPerChunk uint64 = 1000000000000000000 // 1 token per 24k (reclaimable upon suicide)
 
 	// CreateBySelfdestructGas is used when the refunded account is one that does
 	// not exist. This logic is similar to call.
@@ -123,7 +127,8 @@ const (
 	ElasticityMultiplier     = 2          // Bounds the maximum gas limit an EIP-1559 block may have.
 	InitialBaseFee           = 1000000000 // Initial base fee for EIP-1559 blocks.
 
-	MaxCodeSize = 24576 // Maximum bytecode to permit for a contract
+	MaxCodeSizeSoft = 24576      // Maximum bytecode to permit for a contract without staking
+	MaxCodeSizeHard = 512 * 1024 // Maximum bytecode to permit for a contract with staking (hardlimit)
 
 	// Precompiled contract gas prices