forked from cerc-io/plugeth
cmd/evm: add difficulty calculation to t8n tool (#23353)
This PR adds functionality to the evm t8n to calculate ethash difficulty. If the caller does not provide a currentDifficulty, but instead provides the parentTimestamp (well, semi-optional, will default to 0 if not given), and parentDifficulty, we can calculate it for him. The caller can also provide a parentUncleHash. In most, but not all cases, the parent uncle hash also affects the formula. If no such hash is provided (or, if the empty all-zero hash is provided), it's assumed that there were no uncles.
This commit is contained in:
Martin Holst Swende
GitHub
parent
efee85378e
commit
84c51bc5ec
@ -23,6 +23,7 @@ import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/common/math"
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"github.com/ethereum/go-ethereum/consensus/ethash"
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"github.com/ethereum/go-ethereum/consensus/misc"
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"github.com/ethereum/go-ethereum/consensus/misc"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/rawdb"
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@ -46,13 +47,14 @@ type Prestate struct {
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// ExecutionResult contains the execution status after running a state test, any
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// ExecutionResult contains the execution status after running a state test, any
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// error that might have occurred and a dump of the final state if requested.
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// error that might have occurred and a dump of the final state if requested.
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type ExecutionResult struct {
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type ExecutionResult struct {
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StateRoot common.Hash `json:"stateRoot"`
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StateRoot common.Hash `json:"stateRoot"`
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TxRoot common.Hash `json:"txRoot"`
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TxRoot common.Hash `json:"txRoot"`
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ReceiptRoot common.Hash `json:"receiptRoot"`
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ReceiptRoot common.Hash `json:"receiptRoot"`
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LogsHash common.Hash `json:"logsHash"`
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LogsHash common.Hash `json:"logsHash"`
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Bloom types.Bloom `json:"logsBloom" gencodec:"required"`
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Bloom types.Bloom `json:"logsBloom" gencodec:"required"`
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Receipts types.Receipts `json:"receipts"`
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Receipts types.Receipts `json:"receipts"`
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Rejected []*rejectedTx `json:"rejected,omitempty"`
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Rejected []*rejectedTx `json:"rejected,omitempty"`
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Difficulty *math.HexOrDecimal256 `json:"currentDifficulty" gencodec:"required"`
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}
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}
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type ommer struct {
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type ommer struct {
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@ -62,23 +64,28 @@ type ommer struct {
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//go:generate gencodec -type stEnv -field-override stEnvMarshaling -out gen_stenv.go
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//go:generate gencodec -type stEnv -field-override stEnvMarshaling -out gen_stenv.go
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type stEnv struct {
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type stEnv struct {
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Coinbase common.Address `json:"currentCoinbase" gencodec:"required"`
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Coinbase common.Address `json:"currentCoinbase" gencodec:"required"`
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Difficulty *big.Int `json:"currentDifficulty" gencodec:"required"`
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Difficulty *big.Int `json:"currentDifficulty"`
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GasLimit uint64 `json:"currentGasLimit" gencodec:"required"`
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ParentDifficulty *big.Int `json:"parentDifficulty"`
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Number uint64 `json:"currentNumber" gencodec:"required"`
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GasLimit uint64 `json:"currentGasLimit" gencodec:"required"`
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Timestamp uint64 `json:"currentTimestamp" gencodec:"required"`
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Number uint64 `json:"currentNumber" gencodec:"required"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Timestamp uint64 `json:"currentTimestamp" gencodec:"required"`
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Ommers []ommer `json:"ommers,omitempty"`
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ParentTimestamp uint64 `json:"parentTimestamp,omitempty"`
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BaseFee *big.Int `json:"currentBaseFee,omitempty"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Ommers []ommer `json:"ommers,omitempty"`
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BaseFee *big.Int `json:"currentBaseFee,omitempty"`
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ParentUncleHash common.Hash `json:"parentUncleHash"`
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}
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}
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type stEnvMarshaling struct {
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type stEnvMarshaling struct {
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Coinbase common.UnprefixedAddress
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Coinbase common.UnprefixedAddress
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Difficulty *math.HexOrDecimal256
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Difficulty *math.HexOrDecimal256
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GasLimit math.HexOrDecimal64
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ParentDifficulty *math.HexOrDecimal256
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Number math.HexOrDecimal64
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GasLimit math.HexOrDecimal64
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Timestamp math.HexOrDecimal64
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Number math.HexOrDecimal64
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BaseFee *math.HexOrDecimal256
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Timestamp math.HexOrDecimal64
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ParentTimestamp math.HexOrDecimal64
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BaseFee *math.HexOrDecimal256
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}
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}
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type rejectedTx struct {
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type rejectedTx struct {
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@ -247,6 +254,7 @@ func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
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LogsHash: rlpHash(statedb.Logs()),
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LogsHash: rlpHash(statedb.Logs()),
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Receipts: receipts,
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Receipts: receipts,
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Rejected: rejectedTxs,
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Rejected: rejectedTxs,
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Difficulty: (*math.HexOrDecimal256)(vmContext.Difficulty),
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}
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}
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return statedb, execRs, nil
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return statedb, execRs, nil
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}
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}
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@ -274,3 +282,23 @@ func rlpHash(x interface{}) (h common.Hash) {
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hw.Sum(h[:0])
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hw.Sum(h[:0])
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return h
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return h
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}
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}
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// calcDifficulty is based on ethash.CalcDifficulty. This method is used in case
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// the caller does not provide an explicit difficulty, but instead provides only
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// parent timestamp + difficulty.
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// Note: this method only works for ethash engine.
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func calcDifficulty(config *params.ChainConfig, number, currentTime, parentTime uint64,
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parentDifficulty *big.Int, parentUncleHash common.Hash) *big.Int {
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uncleHash := parentUncleHash
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if uncleHash == (common.Hash{}) {
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uncleHash = types.EmptyUncleHash
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}
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parent := &types.Header{
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ParentHash: common.Hash{},
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UncleHash: uncleHash,
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Difficulty: parentDifficulty,
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Number: new(big.Int).SetUint64(number - 1),
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Time: parentTime,
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}
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return ethash.CalcDifficulty(config, currentTime, parent)
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}
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@ -16,38 +16,47 @@ var _ = (*stEnvMarshaling)(nil)
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// MarshalJSON marshals as JSON.
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// MarshalJSON marshals as JSON.
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func (s stEnv) MarshalJSON() ([]byte, error) {
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func (s stEnv) MarshalJSON() ([]byte, error) {
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type stEnv struct {
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type stEnv struct {
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Coinbase common.UnprefixedAddress `json:"currentCoinbase" gencodec:"required"`
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Coinbase common.UnprefixedAddress `json:"currentCoinbase" gencodec:"required"`
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Difficulty *math.HexOrDecimal256 `json:"currentDifficulty" gencodec:"required"`
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Difficulty *math.HexOrDecimal256 `json:"currentDifficulty"`
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GasLimit math.HexOrDecimal64 `json:"currentGasLimit" gencodec:"required"`
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ParentDifficulty *math.HexOrDecimal256 `json:"parentDifficulty"`
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Number math.HexOrDecimal64 `json:"currentNumber" gencodec:"required"`
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GasLimit math.HexOrDecimal64 `json:"currentGasLimit" gencodec:"required"`
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Timestamp math.HexOrDecimal64 `json:"currentTimestamp" gencodec:"required"`
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Number math.HexOrDecimal64 `json:"currentNumber" gencodec:"required"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Timestamp math.HexOrDecimal64 `json:"currentTimestamp" gencodec:"required"`
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Ommers []ommer `json:"ommers,omitempty"`
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ParentTimestamp math.HexOrDecimal64 `json:"parentTimestamp,omitempty"`
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BaseFee *math.HexOrDecimal256 `json:"currentBaseFee,omitempty"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Ommers []ommer `json:"ommers,omitempty"`
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BaseFee *math.HexOrDecimal256 `json:"currentBaseFee,omitempty"`
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ParentUncleHash common.Hash `json:"parentUncleHash"`
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}
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}
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var enc stEnv
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var enc stEnv
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enc.Coinbase = common.UnprefixedAddress(s.Coinbase)
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enc.Coinbase = common.UnprefixedAddress(s.Coinbase)
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enc.Difficulty = (*math.HexOrDecimal256)(s.Difficulty)
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enc.Difficulty = (*math.HexOrDecimal256)(s.Difficulty)
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enc.ParentDifficulty = (*math.HexOrDecimal256)(s.ParentDifficulty)
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enc.GasLimit = math.HexOrDecimal64(s.GasLimit)
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enc.GasLimit = math.HexOrDecimal64(s.GasLimit)
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enc.Number = math.HexOrDecimal64(s.Number)
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enc.Number = math.HexOrDecimal64(s.Number)
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enc.Timestamp = math.HexOrDecimal64(s.Timestamp)
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enc.Timestamp = math.HexOrDecimal64(s.Timestamp)
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enc.ParentTimestamp = math.HexOrDecimal64(s.ParentTimestamp)
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enc.BlockHashes = s.BlockHashes
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enc.BlockHashes = s.BlockHashes
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enc.Ommers = s.Ommers
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enc.Ommers = s.Ommers
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enc.BaseFee = (*math.HexOrDecimal256)(s.BaseFee)
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enc.BaseFee = (*math.HexOrDecimal256)(s.BaseFee)
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enc.ParentUncleHash = s.ParentUncleHash
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return json.Marshal(&enc)
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return json.Marshal(&enc)
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}
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}
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// UnmarshalJSON unmarshals from JSON.
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// UnmarshalJSON unmarshals from JSON.
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func (s *stEnv) UnmarshalJSON(input []byte) error {
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func (s *stEnv) UnmarshalJSON(input []byte) error {
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type stEnv struct {
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type stEnv struct {
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Coinbase *common.UnprefixedAddress `json:"currentCoinbase" gencodec:"required"`
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Coinbase *common.UnprefixedAddress `json:"currentCoinbase" gencodec:"required"`
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Difficulty *math.HexOrDecimal256 `json:"currentDifficulty" gencodec:"required"`
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Difficulty *math.HexOrDecimal256 `json:"currentDifficulty"`
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GasLimit *math.HexOrDecimal64 `json:"currentGasLimit" gencodec:"required"`
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ParentDifficulty *math.HexOrDecimal256 `json:"parentDifficulty"`
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Number *math.HexOrDecimal64 `json:"currentNumber" gencodec:"required"`
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GasLimit *math.HexOrDecimal64 `json:"currentGasLimit" gencodec:"required"`
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Timestamp *math.HexOrDecimal64 `json:"currentTimestamp" gencodec:"required"`
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Number *math.HexOrDecimal64 `json:"currentNumber" gencodec:"required"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Timestamp *math.HexOrDecimal64 `json:"currentTimestamp" gencodec:"required"`
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Ommers []ommer `json:"ommers,omitempty"`
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ParentTimestamp *math.HexOrDecimal64 `json:"parentTimestamp,omitempty"`
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BaseFee *math.HexOrDecimal256 `json:"currentBaseFee,omitempty"`
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BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
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Ommers []ommer `json:"ommers,omitempty"`
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BaseFee *math.HexOrDecimal256 `json:"currentBaseFee,omitempty"`
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ParentUncleHash *common.Hash `json:"parentUncleHash"`
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}
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}
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var dec stEnv
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var dec stEnv
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if err := json.Unmarshal(input, &dec); err != nil {
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if err := json.Unmarshal(input, &dec); err != nil {
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@ -57,10 +66,12 @@ func (s *stEnv) UnmarshalJSON(input []byte) error {
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return errors.New("missing required field 'currentCoinbase' for stEnv")
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return errors.New("missing required field 'currentCoinbase' for stEnv")
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}
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}
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s.Coinbase = common.Address(*dec.Coinbase)
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s.Coinbase = common.Address(*dec.Coinbase)
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if dec.Difficulty == nil {
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if dec.Difficulty != nil {
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return errors.New("missing required field 'currentDifficulty' for stEnv")
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s.Difficulty = (*big.Int)(dec.Difficulty)
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}
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if dec.ParentDifficulty != nil {
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s.ParentDifficulty = (*big.Int)(dec.ParentDifficulty)
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}
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}
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s.Difficulty = (*big.Int)(dec.Difficulty)
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if dec.GasLimit == nil {
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if dec.GasLimit == nil {
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return errors.New("missing required field 'currentGasLimit' for stEnv")
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return errors.New("missing required field 'currentGasLimit' for stEnv")
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}
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}
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@ -73,6 +84,9 @@ func (s *stEnv) UnmarshalJSON(input []byte) error {
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return errors.New("missing required field 'currentTimestamp' for stEnv")
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return errors.New("missing required field 'currentTimestamp' for stEnv")
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}
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}
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s.Timestamp = uint64(*dec.Timestamp)
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s.Timestamp = uint64(*dec.Timestamp)
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if dec.ParentTimestamp != nil {
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s.ParentTimestamp = uint64(*dec.ParentTimestamp)
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}
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if dec.BlockHashes != nil {
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if dec.BlockHashes != nil {
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s.BlockHashes = dec.BlockHashes
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s.BlockHashes = dec.BlockHashes
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}
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}
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@ -82,5 +96,8 @@ func (s *stEnv) UnmarshalJSON(input []byte) error {
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if dec.BaseFee != nil {
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if dec.BaseFee != nil {
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s.BaseFee = (*big.Int)(dec.BaseFee)
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s.BaseFee = (*big.Int)(dec.BaseFee)
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}
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}
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if dec.ParentUncleHash != nil {
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s.ParentUncleHash = *dec.ParentUncleHash
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}
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return nil
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return nil
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}
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}
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@ -252,6 +252,20 @@ func Main(ctx *cli.Context) error {
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return NewError(ErrorVMConfig, errors.New("EIP-1559 config but missing 'currentBaseFee' in env section"))
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return NewError(ErrorVMConfig, errors.New("EIP-1559 config but missing 'currentBaseFee' in env section"))
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}
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}
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}
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}
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if env := prestate.Env; env.Difficulty == nil {
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// If difficulty was not provided by caller, we need to calculate it.
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switch {
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case env.ParentDifficulty == nil:
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return NewError(ErrorVMConfig, errors.New("currentDifficulty was not provided, and cannot be calculated due to missing parentDifficulty"))
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case env.Number == 0:
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return NewError(ErrorVMConfig, errors.New("currentDifficulty needs to be provided for block number 0"))
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case env.Timestamp <= env.ParentTimestamp:
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return NewError(ErrorVMConfig, fmt.Errorf("currentDifficulty cannot be calculated -- currentTime (%d) needs to be after parent time (%d)",
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env.Timestamp, env.ParentTimestamp))
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}
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prestate.Env.Difficulty = calcDifficulty(chainConfig, env.Number, env.Timestamp,
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env.ParentTimestamp, env.ParentDifficulty, env.ParentUncleHash)
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}
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// Run the test and aggregate the result
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// Run the test and aggregate the result
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s, result, err := prestate.Apply(vmConfig, chainConfig, txs, ctx.Int64(RewardFlag.Name), getTracer)
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s, result, err := prestate.Apply(vmConfig, chainConfig, txs, ctx.Int64(RewardFlag.Name), getTracer)
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if err != nil {
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if err != nil {
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12
cmd/evm/testdata/14/alloc.json
vendored
Normal file
12
cmd/evm/testdata/14/alloc.json
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Normal file
@ -0,0 +1,12 @@
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{
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"a94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
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"balance": "0x5ffd4878be161d74",
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"code": "0x",
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"nonce": "0xac",
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"storage": {}
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},
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"0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192":{
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"balance": "0xfeedbead",
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"nonce" : "0x00"
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}
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}
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9
cmd/evm/testdata/14/env.json
vendored
Normal file
9
cmd/evm/testdata/14/env.json
vendored
Normal file
@ -0,0 +1,9 @@
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{
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"currentCoinbase": "0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b",
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"currentGasLimit": "0x750a163df65e8a",
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"currentBaseFee": "0x500",
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"currentNumber": "12800000",
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"currentTimestamp": "10015",
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"parentTimestamp" : "99999",
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"parentDifficulty" : "0x2000000000000"
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}
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10
cmd/evm/testdata/14/env.uncles.json
vendored
Normal file
10
cmd/evm/testdata/14/env.uncles.json
vendored
Normal file
@ -0,0 +1,10 @@
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{
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"currentCoinbase": "0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b",
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"currentGasLimit": "0x750a163df65e8a",
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"currentBaseFee": "0x500",
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"currentNumber": "12800000",
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"currentTimestamp": "10035",
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"parentTimestamp" : "99999",
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"parentDifficulty" : "0x2000000000000",
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"parentUncleHash" : "0x000000000000000000000000000000000000000000000000000000000000beef"
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}
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41
cmd/evm/testdata/14/readme.md
vendored
Normal file
41
cmd/evm/testdata/14/readme.md
vendored
Normal file
@ -0,0 +1,41 @@
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## Difficulty calculation
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This test shows how the `evm t8n` can be used to calculate the (ethash) difficulty, if none is provided by the caller.
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Calculating it (with an empty set of txs) using `London` rules (and no provided unclehash for the parent block):
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```
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[user@work evm]$ ./evm t8n --input.alloc=./testdata/14/alloc.json --input.txs=./testdata/14/txs.json --input.env=./testdata/14/env.json --output.result=stdout --state.fork=London
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INFO [08-08|17:35:46.876] Trie dumping started root=6f0588..7f4bdc
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INFO [08-08|17:35:46.876] Trie dumping complete accounts=2 elapsed="89.313µs"
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INFO [08-08|17:35:46.877] Wrote file file=alloc.json
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{
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"result": {
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"stateRoot": "0x6f058887ca01549716789c380ede95aecc510e6d1fdc4dbf67d053c7c07f4bdc",
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"txRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
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"receiptRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
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"logsHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
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"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
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"receipts": [],
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"currentDifficulty": 3311729559732224
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}
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||||||
|
}
|
||||||
|
```
|
||||||
|
Same thing, but this time providing a non-empty (and non-`emptyKeccak`) unclehash, which leads to a slightly different result:
|
||||||
|
```
|
||||||
|
[user@work evm]$ ./evm t8n --input.alloc=./testdata/14/alloc.json --input.txs=./testdata/14/txs.json --input.env=./testdata/14/env.uncles.json --output.result=stdout --state.fork=London
|
||||||
|
INFO [08-08|17:35:49.232] Trie dumping started root=6f0588..7f4bdc
|
||||||
|
INFO [08-08|17:35:49.232] Trie dumping complete accounts=2 elapsed="83.069µs"
|
||||||
|
INFO [08-08|17:35:49.233] Wrote file file=alloc.json
|
||||||
|
{
|
||||||
|
"result": {
|
||||||
|
"stateRoot": "0x6f058887ca01549716789c380ede95aecc510e6d1fdc4dbf67d053c7c07f4bdc",
|
||||||
|
"txRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
|
||||||
|
"receiptRoot": "0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
|
||||||
|
"logsHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
|
||||||
|
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
|
||||||
|
"receipts": [],
|
||||||
|
"currentDifficulty": 3311179803918336
|
||||||
|
}
|
||||||
|
}
|
||||||
|
```
|
||||||
|
|
||||||
1
cmd/evm/testdata/14/txs.json
vendored
Normal file
1
cmd/evm/testdata/14/txs.json
vendored
Normal file
@ -0,0 +1 @@
|
|||||||
|
[]
|
||||||
Loading…
Reference in New Issue
Block a user