Refactor TFHE

fhevm/contracts_test.go

@@ -1,19 +1,3 @@
-// Copyright 2014 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library 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.
-//
-// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
 package fhevm
 
 import (

fhevm/instructions.go

@@ -184,6 +184,7 @@ func verifyIfCiphertextHandle(handle common.Hash, env EVMEnvironment, contractAd
 	return nil
 }
 
+// This function is a modified copy from https://github.com/ethereum/go-ethereum
 func OpSload(pc *uint64, env EVMEnvironment, scope ScopeContext) ([]byte, error) {
 	loc := scope.GetStack().Peek()
 	hash := common.Hash(loc.Bytes32())
@@ -265,6 +266,7 @@ func persistIfVerifiedCiphertext(flagHandleLocation common.Hash, handle common.H
 }
 
 func OpSstore(pc *uint64, env EVMEnvironment, scope ScopeContext) ([]byte, error) {
+	// This function is a modified copy from https://github.com/ethereum/go-ethereum
 	if env.IsReadOnly() {
 		return nil, ErrWriteProtection
 	}
@@ -348,13 +350,15 @@ func RemoveVerifiedCipherextsAtCurrentDepth(env EVMEnvironment) {
 }
 
 func OpReturn(pc *uint64, env EVMEnvironment, scope ScopeContext) []byte {
+	// This function is a modified copy from https://github.com/ethereum/go-ethereum
 	offset, size := scope.GetStack().Pop(), scope.GetStack().Pop()
 	ret := scope.GetMemory().GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
 	delegateCiphertextHandlesToCaller(env, ret)
 	return ret
 }
 
 func OpSelfdestruct(pc *uint64, env EVMEnvironment, scope ScopeContext) (beneficiary uint256.Int, balance *big.Int) {
+	// This function is a modified copy from https://github.com/ethereum/go-ethereum
 	beneficiary = scope.GetStack().Pop()
 	protectedStorage := fhevm_crypto.CreateProtectedStorageContractAddress(scope.GetContract().Address())
 	balance = env.GetBalance(scope.GetContract().Address())

fhevm/instructions_test.go

@@ -1,19 +1,3 @@
-// Copyright 2014 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library 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.
-//
-// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
 package fhevm
 
 import (

fhevm/memory.go

@@ -1,24 +1,3 @@
-// BSD 3-Clause Clear License
-
-// Copyright © 2023 ZAMA.
-// All rights reserved.
-
-// Copyright 2015 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library 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.
-//
-// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
 package fhevm
 
 import "github.com/holiman/uint256"

fhevm/params.go

@@ -1,23 +1,3 @@
-// BSD 3-Clause Clear License
-
-// Copyright © 2023 ZAMA.
-// All rights reserved.
-
-// Copyright 2015 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library 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.
-//
-// The go-ethereum library 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 the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 package fhevm
 
 // This file contains default gas costs of fhEVM-related operations.