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@ -1,7 +1,11 @@
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use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt}; |
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use hex; |
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use std::fmt; |
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use std::io::{self, Read, Write}; |
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use std::ops::Deref; |
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use serialize::Vector; |
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#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] |
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pub struct BlockHash(pub [u8; 32]); |
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@ -40,3 +44,166 @@ impl BlockHeaderData {
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BlockHeader(self) |
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} |
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} |
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impl BlockHeader { |
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pub fn read<R: Read>(mut reader: R) -> io::Result<Self> { |
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let version = reader.read_i32::<LittleEndian>()?; |
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let mut prev_block = BlockHash([0; 32]); |
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reader.read_exact(&mut prev_block.0)?; |
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let mut merkle_root = [0; 32]; |
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reader.read_exact(&mut merkle_root)?; |
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let mut final_sapling_root = [0; 32]; |
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reader.read_exact(&mut final_sapling_root)?; |
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let time = reader.read_u32::<LittleEndian>()?; |
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let bits = reader.read_u32::<LittleEndian>()?; |
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let mut nonce = [0; 32]; |
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reader.read_exact(&mut nonce)?; |
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let solution = Vector::read(&mut reader, |r| r.read_u8())?; |
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Ok(BlockHeader(BlockHeaderData { |
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version, |
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prev_block, |
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merkle_root, |
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final_sapling_root, |
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time, |
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bits, |
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nonce, |
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solution, |
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})) |
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} |
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pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> { |
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writer.write_i32::<LittleEndian>(self.version)?; |
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writer.write_all(&self.prev_block.0)?; |
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writer.write_all(&self.merkle_root)?; |
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writer.write_all(&self.final_sapling_root)?; |
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writer.write_u32::<LittleEndian>(self.time)?; |
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writer.write_u32::<LittleEndian>(self.bits)?; |
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writer.write_all(&self.nonce)?; |
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Vector::write(&mut writer, &self.solution, |w, b| w.write_u8(*b))?; |
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Ok(()) |
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} |
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} |
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#[cfg(test)] |
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mod tests { |
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use super::BlockHeader; |
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const HEADER_MAINNET_415000: [u8; 1487] = [ |
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0x04, 0x00, 0x00, 0x00, 0x52, 0x74, 0xb4, 0x3b, 0x9e, 0x4a, 0xd8, 0xf4, 0x3e, 0x93, 0xf7, |
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0x84, 0x63, 0xd2, 0x4d, 0xcf, 0xe5, 0x31, 0xae, 0xb4, 0x71, 0x98, 0x19, 0xf4, 0xf9, 0x7f, |
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0x7e, 0x03, 0x00, 0x00, 0x00, 0x00, 0x66, 0x30, 0x73, 0xbc, 0x4b, 0xfa, 0x95, 0xc9, 0xbe, |
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0xc3, 0x6a, 0xad, 0x72, 0x68, 0xa5, 0x73, 0x04, 0x97, 0x97, 0xbd, 0xfc, 0x5a, 0xa4, 0xc7, |
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0x43, 0xfb, 0xe4, 0x82, 0x0a, 0xa3, 0x93, 0xce, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa8, 0xbe, 0xcc, 0x5b, 0xe1, |
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0xab, 0x03, 0x1c, 0xc2, 0xfd, 0x60, 0x7c, 0x77, 0x6a, 0x7a, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x3e, 0xb2, 0x18, 0x19, 0xfd, 0x40, 0x05, 0x00, 0x94, 0x9d, 0x55, 0xde, 0x0c, 0xc6, |
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0x33, 0xe0, 0xcc, 0xe4, 0x1e, 0x46, 0x49, 0xef, 0x4a, 0xa3, 0x34, 0x9f, 0x01, 0x00, 0x29, |
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0x0f, 0xfe, 0x28, 0x1b, 0x94, 0x7b, 0x3b, 0x53, 0xfb, 0xd2, 0xf3, 0x5b, 0x1c, 0xe2, 0x92, |
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0x64, 0x9b, 0x96, 0xac, 0x6e, 0x08, 0x83, 0xaf, 0x3a, 0x68, 0x44, 0xb9, 0x55, 0x92, 0xe7, |
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0x45, 0x56, 0xda, 0x34, 0x4b, 0x47, 0x01, 0x96, 0x1c, 0xd4, 0x13, 0x0c, 0x68, 0x21, 0x9c, |
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0xfa, 0x13, 0x41, 0xd5, 0xaf, 0xb5, 0x04, 0x9e, 0xb0, 0xe8, 0xbe, 0x4a, 0x2d, 0x92, 0xd6, |
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0x78, 0xc4, 0x07, 0x85, 0xe3, 0x37, 0x05, 0x54, 0x8b, 0x5f, 0x3a, 0x54, 0xf0, 0xa4, 0xc3, |
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0x9a, 0x2f, 0x58, 0xee, 0x78, 0x4a, 0x24, 0x16, 0x3c, 0xd8, 0x6f, 0x54, 0x81, 0x23, 0x27, |
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0xdf, 0x55, 0xe1, 0xd5, 0x5c, 0xa8, 0x4b, 0x6e, 0x7b, 0x88, 0x7a, 0x7c, 0xbf, 0xb9, 0x09, |
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0x1a, 0x58, 0x5b, 0xdb, 0x8e, 0xa4, 0x75, 0x93, 0x07, 0xc5, 0x6c, 0x1b, 0x3d, 0xaf, 0xc6, |
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0x69, 0x24, 0x5a, 0x6f, 0x65, 0x4b, 0x6f, 0x73, 0x00, 0x52, 0x26, 0x6a, 0x01, 0xad, 0x4f, |
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0x9c, 0x0b, 0x59, 0xed, 0x4e, 0x17, 0x71, 0x2b, 0x3e, 0x72, 0xdf, 0x04, 0x98, 0xaa, 0x8d, |
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0xe4, 0x88, 0x8f, 0x99, 0x35, 0x31, 0xc6, 0x0a, 0xcd, 0xed, 0x1d, 0x4b, 0x66, 0xe8, 0x9d, |
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0xe0, 0xb6, 0x48, 0x2c, 0xcc, 0xd4, 0xa7, 0x12, 0xf5, 0xcf, 0x9d, 0x4c, 0xa8, 0x3b, 0xe0, |
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0xf9, 0x22, 0xde, 0x2c, 0x1d, 0xbb, 0x3a, 0x14, 0x07, 0x48, 0x0d, 0xbe, 0x87, 0x95, 0x99, |
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0x3d, 0x8b, 0xe6, 0x40, 0x98, 0x8a, 0xbf, 0xe7, 0xa8, 0xa1, 0xb3, 0x3a, 0x12, 0x13, 0x1c, |
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0x45, 0x1e, 0x1a, 0xbc, 0x0d, 0x83, 0xfb, 0x85, 0x18, 0x62, 0xc6, 0x37, 0xce, 0x72, 0x4d, |
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0x5f, 0xe9, 0x7a, 0xa9, 0xa8, 0x06, 0xcf, 0x34, 0xba, 0xb5, 0x09, 0xf4, 0x55, 0x4b, 0x0c, |
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0xd1, 0x0a, 0x7d, 0xdf, 0xd5, 0x82, 0x1b, 0x09, 0x1a, 0xd2, 0xc9, 0x0c, 0x1a, 0xa1, 0xd8, |
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0x1e, 0xb3, 0xd7, 0x2d, 0xb4, 0x19, 0x93, 0xb6, 0x48, 0xf4, 0x1e, 0x21, 0x38, 0xff, 0x95, |
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0x31, 0xa3, 0x0f, 0xf7, 0x3b, 0x22, 0x14, 0x0e, 0x4e, 0xbd, 0x7b, 0xaa, 0x33, 0x84, 0x8e, |
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0x51, 0x2d, 0x99, 0x30, 0x0c, 0x5c, 0x13, 0x1c, 0x6e, 0x75, 0xf5, 0x71, 0x4a, 0x5c, 0x6d, |
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0xcb, 0x17, 0x8b, 0x4a, 0x49, 0x78, 0xda, 0xc8, 0x3a, 0xd4, 0x12, 0xfb, 0xd6, 0x92, 0x01, |
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0x92, 0x50, 0xc5, 0x53, 0x04, 0x9a, 0xad, 0x45, 0x79, 0x84, 0xbe, 0xdf, 0xc9, 0x6a, 0xe7, |
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0x01, 0xc6, 0x59, 0xbc, 0x70, 0x07, 0xa9, 0x7d, 0x0a, 0x90, 0x02, 0xb9, 0x45, 0xbd, 0xec, |
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0x45, 0xa9, 0x45, 0xef, 0x62, 0x85, 0xb2, 0xcd, 0x55, 0x3b, 0x4c, 0x09, 0xd9, 0x07, 0xc6, |
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0x27, 0x86, 0x3f, 0x03, 0x99, 0xe8, 0x72, 0x5b, 0x4f, 0xf7, 0xfc, 0x59, 0x79, 0xe3, 0xcf, |
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0xf2, 0x28, 0x14, 0x50, 0x84, 0x48, 0xef, 0x8b, 0x98, 0x31, 0xc2, 0x85, 0x95, 0x93, 0x33, |
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0x39, 0x6a, 0xa3, 0x62, 0xa5, 0x1c, 0xf2, 0x05, 0x09, 0x7a, 0xfa, 0xbe, 0xc1, 0x5e, 0x41, |
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0xfb, 0x6e, 0x30, 0xb6, 0x22, 0x37, 0x4b, 0xf5, 0x8b, 0x37, 0xef, 0x9d, 0x1b, 0x24, 0x1e, |
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0xad, 0x5a, 0x68, 0x2b, 0x98, 0xb6, 0x57, 0x49, 0xa5, 0x75, 0x68, 0xe2, 0x38, 0xd5, 0x0a, |
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0xfd, 0x41, 0x7e, 0x1e, 0x96, 0x0e, 0x7b, 0x5a, 0x06, 0x4f, 0xd9, 0xf6, 0x94, 0xd7, 0x83, |
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0xa2, 0xcb, 0xcd, 0x58, 0x55, 0x2d, 0xed, 0xbb, 0x9e, 0x5e, 0x11, 0x23, 0x67, 0x4e, 0xf7, |
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0x3a, 0x52, 0x41, 0x96, 0xcf, 0x05, 0xd3, 0xe5, 0x24, 0x66, 0x05, 0x49, 0xff, 0xe7, 0xbd, |
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0x65, 0x68, 0x05, 0x71, 0x35, 0xff, 0xd5, 0xaf, 0xd9, 0x43, 0xf6, 0xda, 0x11, 0xcb, 0xb5, |
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0x97, 0xe8, 0xcc, 0xec, 0xd7, 0x7e, 0xcb, 0xe9, 0x09, 0xde, 0x06, 0x31, 0xbf, 0xa2, 0x9c, |
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0xd3, 0xe3, 0xd5, 0x54, 0x46, 0x71, 0xba, 0x80, 0x25, 0x61, 0x53, 0xd6, 0xe9, 0x99, 0x0b, |
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0x88, 0xad, 0x8e, 0x0c, 0xf4, 0x98, 0x9b, 0xef, 0x4b, 0xe4, 0x57, 0xf9, 0xc7, 0xb0, 0xf1, |
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0xaa, 0xcd, 0x6e, 0x0e, 0xf3, 0x20, 0x60, 0x5c, 0x29, 0xed, 0x0c, 0xd2, 0xeb, 0x6c, 0xfc, |
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0xe2, 0x16, 0xc5, 0x2a, 0x31, 0x75, 0x80, 0x20, 0x1c, 0xad, 0x7a, 0x09, 0x43, 0xd2, 0x4b, |
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0x7b, 0x06, 0xd5, 0xbf, 0x75, 0x87, 0x61, 0xdd, 0x96, 0xe1, 0x19, 0x70, 0xb5, 0xde, 0xd6, |
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0x97, 0x22, 0x2b, 0x2c, 0x77, 0xe7, 0xf2, 0x56, 0xa6, 0x05, 0xac, 0x75, 0x55, 0x49, 0xc1, |
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0x65, 0x1f, 0x25, 0xad, 0xfc, 0x9d, 0x53, 0xd9, 0x11, 0x7e, 0x3a, 0x0b, 0xb4, 0x09, 0xee, |
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0xe4, 0xa6, 0x00, 0x12, 0x04, 0x72, 0x94, 0x9c, 0x7d, 0xda, 0x1c, 0x2e, 0xdb, 0x3c, 0x33, |
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0x0c, 0x7f, 0x96, 0x17, 0x99, 0x82, 0x91, 0x64, 0x57, 0xd3, 0x31, 0xe9, 0x63, 0x09, 0xdd, |
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0x24, 0xdf, 0x74, 0xee, 0xdd, 0x00, 0xe7, 0xdb, 0x49, 0x7e, 0xe1, 0x30, 0xf7, 0x7d, 0xe6, |
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0x66, 0xeb, 0x55, 0x7f, 0xb3, 0x16, 0xe8, 0x7a, 0xda, 0xf1, 0x81, 0x3c, 0xe4, 0x26, 0xa4, |
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0x58, 0xa6, 0xee, 0xe3, 0xa8, 0x5b, 0x2a, 0xb8, 0x8f, 0x65, 0x53, 0xaa, 0xda, 0xe8, 0xde, |
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0x65, 0x2e, 0x21, 0x1a, 0x1d, 0x9f, 0x33, 0x4d, 0x59, 0x6b, 0x5e, 0xb6, 0x17, 0x34, 0x07, |
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0xef, 0xcc, 0x2e, 0x81, 0x54, 0xbb, 0x9c, 0xa1, 0x21, 0x2a, 0xa9, 0xa1, 0xa1, 0x12, 0x1d, |
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0x2f, 0x5a, 0x77, 0x12, 0xcf, 0x25, 0xcc, 0x81, 0x48, 0xb8, 0x05, 0x2e, 0x0d, 0x2e, 0x09, |
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0xf2, 0x0e, 0x5b, 0xa2, 0xa9, 0x82, 0x77, 0xe9, 0x75, 0xb0, 0xee, 0xd9, 0xa8, 0x92, 0x06, |
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0x96, 0x63, 0x37, 0x16, 0x3f, 0x21, 0x5c, 0x9d, 0x04, 0xa6, 0x59, 0x8b, 0x09, 0x58, 0xd3, |
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0x33, 0xd8, 0x46, 0x77, 0x3c, 0x69, 0xe5, 0xab, 0xfd, 0x0a, 0x04, 0x27, 0xf3, 0x66, 0x06, |
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0x14, 0xdd, 0x82, 0xb7, 0x9a, 0xdb, 0x85, 0x1a, 0x0d, 0x58, 0xb6, 0x2d, 0xf5, 0xf0, 0xb3, |
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0xac, 0x83, 0x6e, 0x6e, 0x25, 0xf3, 0xa5, 0x1f, 0x49, 0xa9, 0x9a, 0xde, 0x57, 0x79, 0x6f, |
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0xe9, 0xfc, 0xc2, 0x6f, 0x0a, 0x1f, 0x94, 0xff, 0x08, 0x19, 0xfe, 0x52, 0xb7, 0x50, 0x87, |
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0xed, 0xbe, 0xd3, 0xa8, 0x16, 0x26, 0xeb, 0x54, 0x16, 0xc6, 0x65, 0x57, 0xf1, 0x1c, 0x0f, |
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0xce, 0xdf, 0xf2, 0x23, 0xd6, 0xaa, 0x8c, 0xd5, 0xc3, 0x53, 0x86, 0xe5, 0xb4, 0xb9, 0x5a, |
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0x0f, 0x03, 0x92, 0xca, 0x30, 0x1a, 0x38, 0xb3, 0x68, 0x7d, 0x09, 0x44, 0x93, 0xb9, 0xe9, |
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0xd2, 0x64, 0xd0, 0x7a, 0x19, 0x0c, 0xe5, 0x7d, 0x11, 0x68, 0x04, 0x38, 0x2a, 0x3f, 0xab, |
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0xe1, 0x5a, 0xf4, 0xdf, 0x4f, 0xa0, 0x43, 0xf0, 0x28, 0x7a, 0xa1, 0xed, 0x55, 0x68, 0xd9, |
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0xef, 0x5d, 0x12, 0x51, 0x0d, 0x01, 0x0c, 0xcd, 0xab, 0x4e, 0xb6, 0x16, 0xf6, 0xdf, 0x13, |
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0xbb, 0x31, 0x26, 0xef, 0x43, 0xd9, 0xd6, 0x57, 0x35, 0xe4, 0xe4, 0xc0, 0x4b, 0x57, 0x63, |
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0x48, 0xd0, 0x40, 0xb5, 0x35, 0x05, 0x5a, 0x3d, 0x5a, 0xe1, 0x91, 0xb7, 0x5f, 0x06, 0x12, |
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0xf3, 0xb2, 0x40, 0x66, 0xa0, 0x52, 0x45, 0xf2, 0x7f, 0xe5, 0x7b, 0xda, 0x66, 0xbd, 0x6d, |
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0xec, 0x7e, 0x4f, 0xc9, 0xcb, 0x23, 0x68, 0x02, 0x06, 0x2a, 0xdd, 0xe3, 0xcd, 0x0e, 0x31, |
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0x34, 0x82, 0xc9, 0x2a, 0x0c, 0x72, 0x11, 0x02, 0xb1, 0xf3, 0x8b, 0x01, 0x5a, 0xb8, 0xd0, |
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0x15, 0x59, 0xcb, 0xcb, 0x40, 0xf6, 0x74, 0xe9, 0xef, 0xad, 0x5e, 0xe9, 0xc2, 0xfe, 0x13, |
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0x3f, 0xaa, 0x55, 0xca, 0x1d, 0xd0, 0xff, 0x26, 0x71, 0x0f, 0x9d, 0xa8, 0x19, 0xcc, 0x14, |
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0x59, 0xcb, 0x7e, 0xd2, 0x60, 0xda, 0xd3, 0xdb, 0x05, 0x96, 0x25, 0x8d, 0x47, 0xc7, 0x4c, |
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0x32, 0xa8, 0xb8, 0x52, 0xb6, 0x71, 0xc5, 0xa0, 0xca, 0xa2, 0x00, 0x16, 0x03, 0xd9, 0x0c, |
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0x91, 0xa7, 0xdf, 0x2e, 0x2d, 0x4e, 0xe9, 0xae, 0x9b, 0xf1, 0xa6, 0xb1, 0xec, 0x88, 0x15, |
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0x1c, 0x62, 0x36, 0x0d, 0x03, 0x02, 0x4d, 0x2e, 0x2d, 0x01, 0x14, 0x08, 0x4f, 0x6b, 0x88, |
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0xc5, 0xbb, 0xa2, 0x4a, 0xa7, 0xce, 0xcf, 0xac, 0x16, 0xe9, 0x1e, 0x0b, 0xaf, 0x3d, 0x86, |
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0x53, 0xe2, 0x18, 0x09, 0x3e, 0x81, 0xd2, 0xa6, 0x3c, 0x32, 0xef, 0xf1, 0xd9, 0x03, 0x0f, |
|
|
|
|
0x9e, 0x14, 0x14, 0xec, 0xe4, 0x20, 0xda, 0xa2, 0x4e, 0x0d, 0xd5, 0xb8, 0x45, 0xb3, 0x27, |
|
|
|
|
0x4b, 0xb8, 0x39, 0xca, 0x1c, 0x53, 0xbc, 0xc0, 0x19, 0x42, 0x42, 0xd7, 0x4b, 0x26, 0x31, |
|
|
|
|
0xb9, 0x49, 0x5a, 0x65, 0x4f, 0xbb, 0xdc, 0xbf, 0xad, 0x77, 0x9f, 0x73, 0x22, 0xb6, 0x07, |
|
|
|
|
0x36, 0x24, 0x98, 0x80, 0x60, 0x48, 0x21, 0xd9, 0x69, 0x24, 0xe3, 0xfa, 0x39, 0x7f, 0x35, |
|
|
|
|
0x4a, 0x5e, 0xcc, 0xa3, 0x4f, 0x61, 0x4d, 0xa5, 0x45, 0x6f, 0x9b, 0x36, 0x33, 0x8c, 0x37, |
|
|
|
|
0xd8, 0xf6, 0xfb, 0xf6, 0x26, 0xbe, 0x98, 0x34, 0x77, 0x76, 0x60, 0x22, 0x87, 0x27, 0x46, |
|
|
|
|
0xda, 0x10, 0xa1, 0x77, 0x1c, 0xeb, 0x02, 0xdd, 0x8a, 0xac, 0x01, 0xba, 0x18, 0x6b, 0xf1, |
|
|
|
|
0x48, 0x86, 0x30, 0x47, 0x9e, 0x12, 0x84, 0xda, 0x01, 0x90, 0xfc, 0xe8, 0xb5, 0x9a, 0xc6, |
|
|
|
|
0xb0, 0xfd, 0x41, 0x6b, 0xee, 0x56, 0xb7, 0x2f, 0x0a, 0x58, 0x45, 0x15, 0x35, 0x57, 0xff, |
|
|
|
|
0x0f, 0x49, 0x50, 0xa0, 0xdc, 0x5b, 0xe6, 0x5c, 0xe9, 0x42, 0xd2, 0x2e, 0x18, 0x53, 0x4c, |
|
|
|
|
0x4e, 0x0e, 0xfa, 0xbb, 0x2d, 0x15, 0x25, 0xdc, 0x48, 0x58, 0xb9, 0xb0, 0xf7, 0x7d, 0x47, |
|
|
|
|
0x4a, 0x12, 0x5e, 0xbc, 0x25, 0x0e, 0x08, 0xfe, 0xdb, 0xfa, 0xa6, 0x6f, 0x45, 0x3d, 0x90, |
|
|
|
|
0x93, 0x2c, 0xab, 0x3f, 0xf4, 0x52, 0x21, 0x90, 0x99, 0x68, 0xe5, 0x1e, 0x6b, 0xc2, 0x54, |
|
|
|
|
0xd5, 0x09, 0xad, 0xeb, 0x75, 0xcb, 0xa7, 0x6d, 0x48, 0xfe, 0x02, 0x4e, 0x3e, 0x66, 0xd8, |
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|
0xdf, 0x5e, |
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|
]; |
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#[test] |
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|
fn header_read_write() { |
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|
let header = BlockHeader::read(&HEADER_MAINNET_415000[..]).unwrap(); |
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|
let mut encoded = Vec::with_capacity(HEADER_MAINNET_415000.len()); |
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|
header.write(&mut encoded).unwrap(); |
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|
|
assert_eq!(&HEADER_MAINNET_415000[..], &encoded[..]); |
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|
} |
|
|
|
|
} |
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|