338 lines
12 KiB
Go
338 lines
12 KiB
Go
// Copyright 2023 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 utils
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"sync"
|
|
|
|
"github.com/crate-crypto/go-ipa/bandersnatch/fr"
|
|
"github.com/ethereum/go-ethereum/common/lru"
|
|
"github.com/ethereum/go-ethereum/metrics"
|
|
"github.com/gballet/go-verkle"
|
|
"github.com/holiman/uint256"
|
|
)
|
|
|
|
const (
|
|
// The spec of verkle key encoding can be found here.
|
|
// https://notes.ethereum.org/@vbuterin/verkle_tree_eip#Tree-embedding
|
|
VersionLeafKey = 0
|
|
BalanceLeafKey = 1
|
|
NonceLeafKey = 2
|
|
CodeKeccakLeafKey = 3
|
|
CodeSizeLeafKey = 4
|
|
)
|
|
|
|
var (
|
|
zero = uint256.NewInt(0)
|
|
verkleNodeWidthLog2 = 8
|
|
headerStorageOffset = uint256.NewInt(64)
|
|
mainStorageOffsetLshVerkleNodeWidth = new(uint256.Int).Lsh(uint256.NewInt(256), 31-uint(verkleNodeWidthLog2))
|
|
codeOffset = uint256.NewInt(128)
|
|
verkleNodeWidth = uint256.NewInt(256)
|
|
codeStorageDelta = uint256.NewInt(0).Sub(codeOffset, headerStorageOffset)
|
|
|
|
index0Point *verkle.Point // pre-computed commitment of polynomial [2+256*64]
|
|
|
|
// cacheHitGauge is the metric to track how many cache hit occurred.
|
|
cacheHitGauge = metrics.NewRegisteredGauge("trie/verkle/cache/hit", nil)
|
|
|
|
// cacheMissGauge is the metric to track how many cache miss occurred.
|
|
cacheMissGauge = metrics.NewRegisteredGauge("trie/verkle/cache/miss", nil)
|
|
)
|
|
|
|
func init() {
|
|
// The byte array is the Marshalled output of the point computed as such:
|
|
//
|
|
// var (
|
|
// config = verkle.GetConfig()
|
|
// fr verkle.Fr
|
|
// )
|
|
// verkle.FromLEBytes(&fr, []byte{2, 64})
|
|
// point := config.CommitToPoly([]verkle.Fr{fr}, 1)
|
|
index0Point = new(verkle.Point)
|
|
err := index0Point.SetBytes([]byte{34, 25, 109, 242, 193, 5, 144, 224, 76, 52, 189, 92, 197, 126, 9, 145, 27, 152, 199, 130, 165, 3, 210, 27, 193, 131, 142, 28, 110, 26, 16, 191})
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|
|
|
|
// PointCache is the LRU cache for storing evaluated address commitment.
|
|
type PointCache struct {
|
|
lru lru.BasicLRU[string, *verkle.Point]
|
|
lock sync.RWMutex
|
|
}
|
|
|
|
// NewPointCache returns the cache with specified size.
|
|
func NewPointCache(maxItems int) *PointCache {
|
|
return &PointCache{
|
|
lru: lru.NewBasicLRU[string, *verkle.Point](maxItems),
|
|
}
|
|
}
|
|
|
|
// Get returns the cached commitment for the specified address, or computing
|
|
// it on the flight.
|
|
func (c *PointCache) Get(addr []byte) *verkle.Point {
|
|
c.lock.Lock()
|
|
defer c.lock.Unlock()
|
|
|
|
p, ok := c.lru.Get(string(addr))
|
|
if ok {
|
|
cacheHitGauge.Inc(1)
|
|
return p
|
|
}
|
|
cacheMissGauge.Inc(1)
|
|
p = evaluateAddressPoint(addr)
|
|
c.lru.Add(string(addr), p)
|
|
return p
|
|
}
|
|
|
|
// GetStem returns the first 31 bytes of the tree key as the tree stem. It only
|
|
// works for the account metadata whose treeIndex is 0.
|
|
func (c *PointCache) GetStem(addr []byte) []byte {
|
|
p := c.Get(addr)
|
|
return pointToHash(p, 0)[:31]
|
|
}
|
|
|
|
// GetTreeKey performs both the work of the spec's get_tree_key function, and that
|
|
// of pedersen_hash: it builds the polynomial in pedersen_hash without having to
|
|
// create a mostly zero-filled buffer and "type cast" it to a 128-long 16-byte
|
|
// array. Since at most the first 5 coefficients of the polynomial will be non-zero,
|
|
// these 5 coefficients are created directly.
|
|
func GetTreeKey(address []byte, treeIndex *uint256.Int, subIndex byte) []byte {
|
|
if len(address) < 32 {
|
|
var aligned [32]byte
|
|
address = append(aligned[:32-len(address)], address...)
|
|
}
|
|
// poly = [2+256*64, address_le_low, address_le_high, tree_index_le_low, tree_index_le_high]
|
|
var poly [5]fr.Element
|
|
|
|
// 32-byte address, interpreted as two little endian
|
|
// 16-byte numbers.
|
|
verkle.FromLEBytes(&poly[1], address[:16])
|
|
verkle.FromLEBytes(&poly[2], address[16:])
|
|
|
|
// treeIndex must be interpreted as a 32-byte aligned little-endian integer.
|
|
// e.g: if treeIndex is 0xAABBCC, we need the byte representation to be 0xCCBBAA00...00.
|
|
// poly[3] = LE({CC,BB,AA,00...0}) (16 bytes), poly[4]=LE({00,00,...}) (16 bytes).
|
|
//
|
|
// To avoid unnecessary endianness conversions for go-ipa, we do some trick:
|
|
// - poly[3]'s byte representation is the same as the *top* 16 bytes (trieIndexBytes[16:]) of
|
|
// 32-byte aligned big-endian representation (BE({00,...,AA,BB,CC})).
|
|
// - poly[4]'s byte representation is the same as the *low* 16 bytes (trieIndexBytes[:16]) of
|
|
// the 32-byte aligned big-endian representation (BE({00,00,...}).
|
|
trieIndexBytes := treeIndex.Bytes32()
|
|
verkle.FromBytes(&poly[3], trieIndexBytes[16:])
|
|
verkle.FromBytes(&poly[4], trieIndexBytes[:16])
|
|
|
|
cfg := verkle.GetConfig()
|
|
ret := cfg.CommitToPoly(poly[:], 0)
|
|
|
|
// add a constant point corresponding to poly[0]=[2+256*64].
|
|
ret.Add(ret, index0Point)
|
|
|
|
return pointToHash(ret, subIndex)
|
|
}
|
|
|
|
// GetTreeKeyWithEvaluatedAddress is basically identical to GetTreeKey, the only
|
|
// difference is a part of polynomial is already evaluated.
|
|
//
|
|
// Specifically, poly = [2+256*64, address_le_low, address_le_high] is already
|
|
// evaluated.
|
|
func GetTreeKeyWithEvaluatedAddress(evaluated *verkle.Point, treeIndex *uint256.Int, subIndex byte) []byte {
|
|
var poly [5]fr.Element
|
|
|
|
poly[0].SetZero()
|
|
poly[1].SetZero()
|
|
poly[2].SetZero()
|
|
|
|
// little-endian, 32-byte aligned treeIndex
|
|
var index [32]byte
|
|
for i := 0; i < len(treeIndex); i++ {
|
|
binary.LittleEndian.PutUint64(index[i*8:(i+1)*8], treeIndex[i])
|
|
}
|
|
verkle.FromLEBytes(&poly[3], index[:16])
|
|
verkle.FromLEBytes(&poly[4], index[16:])
|
|
|
|
cfg := verkle.GetConfig()
|
|
ret := cfg.CommitToPoly(poly[:], 0)
|
|
|
|
// add the pre-evaluated address
|
|
ret.Add(ret, evaluated)
|
|
|
|
return pointToHash(ret, subIndex)
|
|
}
|
|
|
|
// VersionKey returns the verkle tree key of the version field for the specified account.
|
|
func VersionKey(address []byte) []byte {
|
|
return GetTreeKey(address, zero, VersionLeafKey)
|
|
}
|
|
|
|
// BalanceKey returns the verkle tree key of the balance field for the specified account.
|
|
func BalanceKey(address []byte) []byte {
|
|
return GetTreeKey(address, zero, BalanceLeafKey)
|
|
}
|
|
|
|
// NonceKey returns the verkle tree key of the nonce field for the specified account.
|
|
func NonceKey(address []byte) []byte {
|
|
return GetTreeKey(address, zero, NonceLeafKey)
|
|
}
|
|
|
|
// CodeKeccakKey returns the verkle tree key of the code keccak field for
|
|
// the specified account.
|
|
func CodeKeccakKey(address []byte) []byte {
|
|
return GetTreeKey(address, zero, CodeKeccakLeafKey)
|
|
}
|
|
|
|
// CodeSizeKey returns the verkle tree key of the code size field for the
|
|
// specified account.
|
|
func CodeSizeKey(address []byte) []byte {
|
|
return GetTreeKey(address, zero, CodeSizeLeafKey)
|
|
}
|
|
|
|
func codeChunkIndex(chunk *uint256.Int) (*uint256.Int, byte) {
|
|
var (
|
|
chunkOffset = new(uint256.Int).Add(codeOffset, chunk)
|
|
treeIndex, subIndexMod = new(uint256.Int).DivMod(chunkOffset, verkleNodeWidth, new(uint256.Int))
|
|
)
|
|
return treeIndex, byte(subIndexMod.Uint64())
|
|
}
|
|
|
|
// CodeChunkKey returns the verkle tree key of the code chunk for the
|
|
// specified account.
|
|
func CodeChunkKey(address []byte, chunk *uint256.Int) []byte {
|
|
treeIndex, subIndex := codeChunkIndex(chunk)
|
|
return GetTreeKey(address, treeIndex, subIndex)
|
|
}
|
|
|
|
func storageIndex(bytes []byte) (*uint256.Int, byte) {
|
|
// If the storage slot is in the header, we need to add the header offset.
|
|
var key uint256.Int
|
|
key.SetBytes(bytes)
|
|
if key.Cmp(codeStorageDelta) < 0 {
|
|
// This addition is always safe; it can't ever overflow since pos<codeStorageDelta.
|
|
key.Add(headerStorageOffset, &key)
|
|
|
|
// In this branch, the tree-index is zero since we're in the account header,
|
|
// and the sub-index is the LSB of the modified storage key.
|
|
return zero, byte(key[0] & 0xFF)
|
|
}
|
|
// We first divide by VerkleNodeWidth to create room to avoid an overflow next.
|
|
key.Rsh(&key, uint(verkleNodeWidthLog2))
|
|
|
|
// We add mainStorageOffset/VerkleNodeWidth which can't overflow.
|
|
key.Add(&key, mainStorageOffsetLshVerkleNodeWidth)
|
|
|
|
// The sub-index is the LSB of the original storage key, since mainStorageOffset
|
|
// doesn't affect this byte, so we can avoid masks or shifts.
|
|
return &key, byte(key[0] & 0xFF)
|
|
}
|
|
|
|
// StorageSlotKey returns the verkle tree key of the storage slot for the
|
|
// specified account.
|
|
func StorageSlotKey(address []byte, storageKey []byte) []byte {
|
|
treeIndex, subIndex := storageIndex(storageKey)
|
|
return GetTreeKey(address, treeIndex, subIndex)
|
|
}
|
|
|
|
// VersionKeyWithEvaluatedAddress returns the verkle tree key of the version
|
|
// field for the specified account. The difference between VersionKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func VersionKeyWithEvaluatedAddress(evaluated *verkle.Point) []byte {
|
|
return GetTreeKeyWithEvaluatedAddress(evaluated, zero, VersionLeafKey)
|
|
}
|
|
|
|
// BalanceKeyWithEvaluatedAddress returns the verkle tree key of the balance
|
|
// field for the specified account. The difference between BalanceKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func BalanceKeyWithEvaluatedAddress(evaluated *verkle.Point) []byte {
|
|
return GetTreeKeyWithEvaluatedAddress(evaluated, zero, BalanceLeafKey)
|
|
}
|
|
|
|
// NonceKeyWithEvaluatedAddress returns the verkle tree key of the nonce
|
|
// field for the specified account. The difference between NonceKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func NonceKeyWithEvaluatedAddress(evaluated *verkle.Point) []byte {
|
|
return GetTreeKeyWithEvaluatedAddress(evaluated, zero, NonceLeafKey)
|
|
}
|
|
|
|
// CodeKeccakKeyWithEvaluatedAddress returns the verkle tree key of the code
|
|
// keccak for the specified account. The difference between CodeKeccakKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func CodeKeccakKeyWithEvaluatedAddress(evaluated *verkle.Point) []byte {
|
|
return GetTreeKeyWithEvaluatedAddress(evaluated, zero, CodeKeccakLeafKey)
|
|
}
|
|
|
|
// CodeSizeKeyWithEvaluatedAddress returns the verkle tree key of the code
|
|
// size for the specified account. The difference between CodeSizeKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func CodeSizeKeyWithEvaluatedAddress(evaluated *verkle.Point) []byte {
|
|
return GetTreeKeyWithEvaluatedAddress(evaluated, zero, CodeSizeLeafKey)
|
|
}
|
|
|
|
// CodeChunkKeyWithEvaluatedAddress returns the verkle tree key of the code
|
|
// chunk for the specified account. The difference between CodeChunkKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func CodeChunkKeyWithEvaluatedAddress(addressPoint *verkle.Point, chunk *uint256.Int) []byte {
|
|
treeIndex, subIndex := codeChunkIndex(chunk)
|
|
return GetTreeKeyWithEvaluatedAddress(addressPoint, treeIndex, subIndex)
|
|
}
|
|
|
|
// StorageSlotKeyWithEvaluatedAddress returns the verkle tree key of the storage
|
|
// slot for the specified account. The difference between StorageSlotKey is the
|
|
// address evaluation is already computed to minimize the computational overhead.
|
|
func StorageSlotKeyWithEvaluatedAddress(evaluated *verkle.Point, storageKey []byte) []byte {
|
|
treeIndex, subIndex := storageIndex(storageKey)
|
|
return GetTreeKeyWithEvaluatedAddress(evaluated, treeIndex, subIndex)
|
|
}
|
|
|
|
func pointToHash(evaluated *verkle.Point, suffix byte) []byte {
|
|
// The output of Byte() is big endian for banderwagon. This
|
|
// introduces an imbalance in the tree, because hashes are
|
|
// elements of a 253-bit field. This means more than half the
|
|
// tree would be empty. To avoid this problem, use a little
|
|
// endian commitment and chop the MSB.
|
|
bytes := evaluated.Bytes()
|
|
for i := 0; i < 16; i++ {
|
|
bytes[31-i], bytes[i] = bytes[i], bytes[31-i]
|
|
}
|
|
bytes[31] = suffix
|
|
return bytes[:]
|
|
}
|
|
|
|
func evaluateAddressPoint(address []byte) *verkle.Point {
|
|
if len(address) < 32 {
|
|
var aligned [32]byte
|
|
address = append(aligned[:32-len(address)], address...)
|
|
}
|
|
var poly [3]fr.Element
|
|
|
|
poly[0].SetZero()
|
|
|
|
// 32-byte address, interpreted as two little endian
|
|
// 16-byte numbers.
|
|
verkle.FromLEBytes(&poly[1], address[:16])
|
|
verkle.FromLEBytes(&poly[2], address[16:])
|
|
|
|
cfg := verkle.GetConfig()
|
|
ret := cfg.CommitToPoly(poly[:], 0)
|
|
|
|
// add a constant point
|
|
ret.Add(ret, index0Point)
|
|
return ret
|
|
}
|