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- // Copyright 2017 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 tests
- import (
- "fmt"
- "math/big"
- "github.com/ethereum/go-ethereum/common"
- "github.com/ethereum/go-ethereum/common/math"
- "github.com/ethereum/go-ethereum/consensus/ethash"
- "github.com/ethereum/go-ethereum/core/types"
- "github.com/ethereum/go-ethereum/params"
- )
- //go:generate gencodec -type DifficultyTest -field-override difficultyTestMarshaling -out gen_difficultytest.go
- type DifficultyTest struct {
- ParentTimestamp *big.Int `json:"parentTimestamp"`
- ParentDifficulty *big.Int `json:"parentDifficulty"`
- UncleHash common.Hash `json:"parentUncles"`
- CurrentTimestamp *big.Int `json:"currentTimestamp"`
- CurrentBlockNumber uint64 `json:"currentBlockNumber"`
- CurrentDifficulty *big.Int `json:"currentDifficulty"`
- }
- type difficultyTestMarshaling struct {
- ParentTimestamp *math.HexOrDecimal256
- ParentDifficulty *math.HexOrDecimal256
- CurrentTimestamp *math.HexOrDecimal256
- CurrentDifficulty *math.HexOrDecimal256
- UncleHash common.Hash
- CurrentBlockNumber math.HexOrDecimal64
- }
- func (test *DifficultyTest) Run(config *params.ChainConfig) error {
- parentNumber := big.NewInt(int64(test.CurrentBlockNumber - 1))
- parent := &types.Header{
- Difficulty: test.ParentDifficulty,
- Time: test.ParentTimestamp,
- Number: parentNumber,
- UncleHash: test.UncleHash,
- }
- actual := ethash.CalcDifficulty(config, test.CurrentTimestamp.Uint64(), parent)
- exp := test.CurrentDifficulty
- if actual.Cmp(exp) != 0 {
- return fmt.Errorf("parent[time %v diff %v unclehash:%x] child[time %v number %v] diff %v != expected %v",
- test.ParentTimestamp, test.ParentDifficulty, test.UncleHash,
- test.CurrentTimestamp, test.CurrentBlockNumber, actual, exp)
- }
- return nil
- }
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