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Merge pull request #8 from OffchainLabs/stylus-state-storage
Stylus state storage
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,37 @@ | ||
| // 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/>. | ||
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| package vm | ||
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| func (in *EVMInterpreter) Config() *Config { | ||
| return &in.cfg | ||
| } | ||
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| func (in *EVMInterpreter) Depth() int { | ||
| return in.evm.depth | ||
| } | ||
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| func (in *EVMInterpreter) Evm() *EVM { | ||
| return in.evm | ||
| } | ||
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| func (in *EVMInterpreter) ReadOnly() bool { | ||
| return in.readOnly | ||
| } | ||
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| func (in *EVMInterpreter) SetReturnData(data []byte) { | ||
| in.returnData = data | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| // Copyright 2020 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/>. | ||
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| package vm | ||
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| import ( | ||
| "fmt" | ||
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| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/params" | ||
| ) | ||
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| // Computes the cost of doing a state load in wasm | ||
| // Note: the code here is adapted from gasSLoadEIP2929 | ||
| func WasmStateLoadCost(db StateDB, program common.Address, key common.Hash) uint64 { | ||
| // Check slot presence in the access list | ||
| if _, slotPresent := db.SlotInAccessList(program, key); !slotPresent { | ||
| // If the caller cannot afford the cost, this change will be rolled back | ||
| // If he does afford it, we can skip checking the same thing later on, during execution | ||
| db.AddSlotToAccessList(program, key) | ||
| return params.ColdSloadCostEIP2929 | ||
| } | ||
| return params.WarmStorageReadCostEIP2929 | ||
| } | ||
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| // Computes the cost of doing a state store in wasm | ||
| // Note: the code here is adapted from makeGasSStoreFunc with the most recent parameters as of The Merge | ||
| // Note: the sentry check must be done by the caller | ||
| func WasmStateStoreCost(db StateDB, program common.Address, key, value common.Hash) uint64 { | ||
| clearingRefund := params.SstoreClearsScheduleRefundEIP3529 | ||
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| cost := uint64(0) | ||
| current := db.GetState(program, key) | ||
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| // Check slot presence in the access list | ||
| if addrPresent, slotPresent := db.SlotInAccessList(program, key); !slotPresent { | ||
| cost = params.ColdSloadCostEIP2929 | ||
| // If the caller cannot afford the cost, this change will be rolled back | ||
| db.AddSlotToAccessList(program, key) | ||
| if !addrPresent { | ||
| panic(fmt.Sprintf("impossible case: address %v was not present in access list", program)) | ||
| } | ||
| } | ||
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| if current == value { // noop (1) | ||
| // EIP 2200 original clause: | ||
| // return params.SloadGasEIP2200, nil | ||
| return cost + params.WarmStorageReadCostEIP2929 // SLOAD_GAS | ||
| } | ||
| original := db.GetCommittedState(program, key) | ||
| if original == current { | ||
| if original == (common.Hash{}) { // create slot (2.1.1) | ||
| return cost + params.SstoreSetGasEIP2200 | ||
| } | ||
| if value == (common.Hash{}) { // delete slot (2.1.2b) | ||
| db.AddRefund(clearingRefund) | ||
| } | ||
| // EIP-2200 original clause: | ||
| // return params.SstoreResetGasEIP2200, nil // write existing slot (2.1.2) | ||
| return cost + (params.SstoreResetGasEIP2200 - params.ColdSloadCostEIP2929) // write existing slot (2.1.2) | ||
| } | ||
| if original != (common.Hash{}) { | ||
| if current == (common.Hash{}) { // recreate slot (2.2.1.1) | ||
| db.SubRefund(clearingRefund) | ||
| } else if value == (common.Hash{}) { // delete slot (2.2.1.2) | ||
| db.AddRefund(clearingRefund) | ||
| } | ||
| } | ||
| if original == value { | ||
| if original == (common.Hash{}) { // reset to original inexistent slot (2.2.2.1) | ||
| // EIP 2200 Original clause: | ||
| //evm.StateDB.AddRefund(params.SstoreSetGasEIP2200 - params.SloadGasEIP2200) | ||
| db.AddRefund(params.SstoreSetGasEIP2200 - params.WarmStorageReadCostEIP2929) | ||
| } else { // reset to original existing slot (2.2.2.2) | ||
| // EIP 2200 Original clause: | ||
| // evm.StateDB.AddRefund(params.SstoreResetGasEIP2200 - params.SloadGasEIP2200) | ||
| // - SSTORE_RESET_GAS redefined as (5000 - COLD_SLOAD_COST) | ||
| // - SLOAD_GAS redefined as WARM_STORAGE_READ_COST | ||
| // Final: (5000 - COLD_SLOAD_COST) - WARM_STORAGE_READ_COST | ||
| db.AddRefund((params.SstoreResetGasEIP2200 - params.ColdSloadCostEIP2929) - params.WarmStorageReadCostEIP2929) | ||
| } | ||
| } | ||
| // EIP-2200 original clause: | ||
| //return params.SloadGasEIP2200, nil // dirty update (2.2) | ||
| return cost + params.WarmStorageReadCostEIP2929 // dirty update (2.2) | ||
| } |