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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| * MIT License | ||
| * | ||
| * Copyright (c) 2016-2018. ThunderDB | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| // Package cpuminer implements CPU based PoW functions | ||
| package cpuminer | ||
|
|
||
| import ( | ||
| "errors" | ||
| "math/big" | ||
|
|
||
| log "github.com/sirupsen/logrus" | ||
| "github.com/thunderdb/ThunderDB/crypto/hash" | ||
| ) | ||
|
|
||
| // Nonce contains nonce and the difficulty to the block | ||
| type Nonce struct { | ||
| Nonce big.Int | ||
| Difficulty int | ||
| } | ||
|
|
||
| // MiningBlock contains Data tobe mined | ||
| type MiningBlock struct { | ||
| Data []byte | ||
| // NonceChan is used to notify the got nonce | ||
| NonceChan chan Nonce | ||
| // Stop chan is used to stop mining and return the max difficult nonce | ||
| Stop chan struct{} | ||
| } | ||
|
|
||
| // CPUMiner provides concurrency-safe PoW worker group to solve hash puzzle | ||
| // Inspired by: | ||
| // "S/Kademlia: A Practicable Approach Towards Secure Key-Based Routing" | ||
| // - Section 4.1. Secure nodeId assignment. | ||
| // - Figure 3. Static (left) and dynamic (right) crypto puzzles for nodeId | ||
| // generation | ||
| type CPUMiner struct { | ||
| quit chan struct{} | ||
| } | ||
|
|
||
| // NewCPUMiner init a new CPU miner | ||
| func NewCPUMiner(quit chan struct{}) *CPUMiner { | ||
| return &CPUMiner{quit: quit} | ||
| } | ||
|
|
||
| // HashBlock calculate the hash of MiningBlock | ||
| func (miner *CPUMiner) HashBlock(data []byte, nonce big.Int) hash.Hash { | ||
| return hash.DoubleHashH(append(data, nonce.Bytes()...)) | ||
| } | ||
|
|
||
| // CalclateBlockNonce find nonce make HashBlock() match the MiningBlock Difficulty from the startNonce | ||
| // if interrupted or stopped highest difficulty nonce will be sent to the NonceCh | ||
| func (miner *CPUMiner) CalculateBlockNonce( | ||
| block MiningBlock, | ||
| startNonce big.Int, | ||
| difficulty int, | ||
| ) (err error) { | ||
| var ( | ||
| bestNonce Nonce | ||
| ) | ||
| for i := startNonce; ; i.Add(&i, big.NewInt(1)) { | ||
| select { | ||
| case <-block.Stop: | ||
| log.Info("Stop mining job") | ||
| block.NonceChan <- bestNonce | ||
| return errors.New("mining job stopped") | ||
| case <-miner.quit: | ||
| log.Info("Stop mining worker") | ||
| block.NonceChan <- bestNonce | ||
| return errors.New("miner interrupted") | ||
| default: | ||
| currentHash := miner.HashBlock(block.Data, i) | ||
| currentDifficulty := currentHash.Difficulty() | ||
| if currentDifficulty >= difficulty { | ||
| bestNonce.Difficulty = currentDifficulty | ||
| bestNonce.Nonce.Set(&i) | ||
| block.NonceChan <- bestNonce | ||
| return | ||
| } | ||
| if currentDifficulty > bestNonce.Difficulty { | ||
| bestNonce.Difficulty = currentDifficulty | ||
| bestNonce.Nonce.Set(&i) | ||
| } | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| /* | ||
| * MIT License | ||
| * | ||
| * Copyright (c) 2016-2018. ThunderDB | ||
| * | ||
| * Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| * of this software and associated documentation files (the "Software"), to deal | ||
| * in the Software without restriction, including without limitation the rights | ||
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| * copies of the Software, and to permit persons to whom the Software is | ||
| * furnished to do so, subject to the following conditions: | ||
| * | ||
| * The above copyright notice and this permission notice shall be included in all | ||
| * copies or substantial portions of the Software. | ||
| * | ||
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | ||
| * SOFTWARE. | ||
| */ | ||
|
|
||
| package cpuminer | ||
|
|
||
| import ( | ||
| "math/big" | ||
| "testing" | ||
|
|
||
| "time" | ||
|
|
||
| "github.com/thunderdb/ThunderDB/crypto/hash" | ||
| ) | ||
|
|
||
| func TestCPUMiner_HashBlock(t *testing.T) { | ||
| miner := NewCPUMiner(make(chan struct{})) | ||
| nonceCh := make(chan Nonce) | ||
| stop := make(chan struct{}) | ||
| diffWanted := 20 | ||
| data := []byte{ | ||
| 0x79, 0xa6, 0x1a, 0xdb, 0xc6, 0xe5, 0xa2, 0xe1, | ||
| 0x39, 0xd2, 0x71, 0x3a, 0x54, 0x6e, 0xc7, 0xc8, | ||
| 0x75, 0x63, 0x2e, 0x75, 0xf1, 0xdf, 0x9c, 0x3f, | ||
| 0xa6, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | ||
| } | ||
| block := MiningBlock{ | ||
| Data: data, | ||
| NonceChan: nonceCh, | ||
| Stop: stop, | ||
| } | ||
| var ( | ||
| err error | ||
| ) | ||
| go func() { | ||
| err = miner.CalculateBlockNonce(block, *big.NewInt(0), diffWanted) | ||
| }() | ||
| nonceFromCh := <-nonceCh | ||
|
|
||
| hash := hash.DoubleHashH(append(data, nonceFromCh.Nonce.Bytes()...)) | ||
| if err != nil || nonceFromCh.Difficulty < diffWanted || hash.Difficulty() < diffWanted { | ||
| t.Errorf("CalculateBlockNonce got %v, difficulty %d, nonce %s", | ||
| err, nonceFromCh.Difficulty, nonceFromCh.Nonce.String()) | ||
| } | ||
| t.Logf("Difficulty: %d, Hash: %s", nonceFromCh.Difficulty, hash.String()) | ||
| } | ||
|
|
||
| func TestCPUMiner_HashBlock_stop(t *testing.T) { | ||
| minerQuit := make(chan struct{}) | ||
| miner := NewCPUMiner(minerQuit) | ||
| nonceCh := make(chan Nonce) | ||
| stop := make(chan struct{}) | ||
| diffWanted := 256 | ||
| data := []byte{ | ||
| 0x79, 0xa6, | ||
| } | ||
| block := MiningBlock{ | ||
| Data: data, | ||
| NonceChan: nonceCh, | ||
| Stop: stop, | ||
| } | ||
| var ( | ||
| err error | ||
| ) | ||
| go func() { | ||
| err = miner.CalculateBlockNonce(block, *big.NewInt(0), diffWanted) | ||
| }() | ||
| // stop miner | ||
| time.Sleep(2 * time.Second) | ||
| block.Stop <- struct{}{} | ||
| //miner.quit <- struct{}{} | ||
|
|
||
| nonceFromCh := <-block.NonceChan | ||
|
|
||
| //hasha := miner.HashBlock(data, nonceFromCh.Nonce) | ||
| hasha := hash.DoubleHashH(append(data, nonceFromCh.Nonce.Bytes()...)) | ||
| if nonceFromCh.Difficulty < 1 || hasha.Difficulty() != nonceFromCh.Difficulty { | ||
| t.Errorf("CalculateBlockNonce got %v, difficulty %d, nonce %s, hash %s", | ||
| err, nonceFromCh.Difficulty, nonceFromCh.Nonce.String(), hasha.String()) | ||
| } | ||
| t.Logf("Difficulty: %d, Hash: %s", nonceFromCh.Difficulty, hasha.String()) | ||
| } | ||
|
|
||
| func TestCPUMiner_HashBlock_quit(t *testing.T) { | ||
| minerQuit := make(chan struct{}) | ||
| miner := NewCPUMiner(minerQuit) | ||
| nonceCh := make(chan Nonce) | ||
| stop := make(chan struct{}) | ||
| diffWanted := 256 | ||
| data := []byte{ | ||
| 0x79, 0xa6, | ||
| } | ||
| block := MiningBlock{ | ||
| Data: data, | ||
| NonceChan: nonceCh, | ||
| Stop: stop, | ||
| } | ||
| var ( | ||
| err error | ||
| ) | ||
| go func() { | ||
| err = miner.CalculateBlockNonce(block, *big.NewInt(0), diffWanted) | ||
| }() | ||
| // stop miner | ||
| time.Sleep(2 * time.Second) | ||
| //block.Stop <- struct{}{} | ||
| miner.quit <- struct{}{} | ||
|
|
||
| nonceFromCh := <-block.NonceChan | ||
|
|
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| //hasha := miner.HashBlock(data, nonceFromCh.Nonce) | ||
| hasha := hash.DoubleHashH(append(data, nonceFromCh.Nonce.Bytes()...)) | ||
| if nonceFromCh.Difficulty < 1 || hasha.Difficulty() != nonceFromCh.Difficulty { | ||
| t.Errorf("CalculateBlockNonce got %v, difficulty %d, nonce %s, hash %s", | ||
| err, nonceFromCh.Difficulty, nonceFromCh.Nonce.String(), hasha.String()) | ||
| } | ||
| t.Logf("Difficulty: %d, Hash: %s", nonceFromCh.Difficulty, hasha.String()) | ||
| } |
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