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63 lines
1.7 KiB
63 lines
1.7 KiB
package stratum |
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import ( |
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"bytes" |
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"encoding/binary" |
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"encoding/hex" |
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"log" |
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"math/big" |
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"../cnutil" |
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) |
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type BlockTemplate struct { |
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diffInt64 int64 |
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height int64 |
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difficulty *big.Int |
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reservedOffset int |
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prevHash string |
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buffer []byte |
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} |
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func (b *BlockTemplate) nextBlob(extraNonce uint32, instanceId []byte) string { |
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extraBuff := new(bytes.Buffer) |
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binary.Write(extraBuff, binary.BigEndian, extraNonce) |
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blobBuff := make([]byte, len(b.buffer)) |
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copy(blobBuff, b.buffer) |
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copy(blobBuff[b.reservedOffset+4:b.reservedOffset+7], instanceId) |
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copy(blobBuff[b.reservedOffset:], extraBuff.Bytes()) |
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blob := cnutil.ConvertBlob(blobBuff) |
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return hex.EncodeToString(blob) |
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} |
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func (s *StratumServer) fetchBlockTemplate() bool { |
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r := s.rpc() |
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reply, err := r.GetBlockTemplate(8, s.config.Address) |
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if err != nil { |
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log.Printf("Error while refreshing block template: %s", err) |
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return false |
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} |
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t := s.currentBlockTemplate() |
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if t != nil && t.prevHash == reply.PrevHash { |
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// Fallback to height comparison |
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if len(reply.PrevHash) == 0 && reply.Height > t.height { |
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log.Printf("New block to mine on %s at height %v, diff: %v", r.Name, reply.Height, reply.Difficulty) |
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} else { |
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return false |
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} |
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} else { |
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log.Printf("New block to mine on %s at height %v, diff: %v, prev_hash: %s", r.Name, reply.Height, reply.Difficulty, reply.PrevHash) |
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} |
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newTemplate := BlockTemplate{ |
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diffInt64: reply.Difficulty, |
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difficulty: big.NewInt(reply.Difficulty), |
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height: reply.Height, |
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prevHash: reply.PrevHash, |
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reservedOffset: reply.ReservedOffset, |
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} |
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newTemplate.buffer, _ = hex.DecodeString(reply.Blob) |
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s.blockTemplate.Store(&newTemplate) |
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return true |
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}
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