      1
      2
      3
      4
      5
      6
      7
      8
      9
     10
     11
     12
     13
     14
     15
     16
     17
     18
     19
     20
     21
     22
     23
     24
     25
     26
     27
     28
     29
     30
     31
     32
     33
     34
     35
     36
     37
     38
     39
     40
     41
     42
     43
     44
     45
     46
     47
     48
     49
     50
     51
     52
     53
     54
     55
     56
     57
     58
     59
     60
     61
     62
     63
     64
     65
     66
     67
     68
     69
     70
     71
     72
     73
     74
     75
     76
     77
     78
     79
     80
     81
     82
     83
     84
     85
     86
     87
     88
     89
     90
     91
     92
     93
     94
     95
     96
     97
     98
     99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    153
    154
    155
    156
    157
    158
    159
    160
    161
    162
    163
    164

    //! Secret with additional network identifier and format type

    use std::fmt;
    use std::str::FromStr;
    use secp256k1::key;
    use secp256k1::Message as SecpMessage;
    use hex::ToHex;
    use base58::{ToBase58, FromBase58};
    use crypto::checksum;
    use hash::H520;
    use network::Network;
    use {Secret, DisplayLayout, Error, Message, Signature, CompactSignature, SECP256K1};

    /// Secret with additional network identifier and format type
    #[derive(PartialEq)]
    pub struct Private {
    	/// The network on which this key should be used.
    	pub network: Network,
    	/// ECDSA key.
    	pub secret: Secret,
    	/// True if this private key represents a compressed address.
    	pub compressed: bool,
    }

    impl Private {
    	pub fn sign(&self, message: &Message) -> Result<Signature, Error> {
    		let context = &SECP256K1;
    		let secret = try!(key::SecretKey::from_slice(context, &*self.secret));
    		let message = try!(SecpMessage::from_slice(&**message));
    		let signature = try!(context.sign(&message, &secret));
    		let data = signature.serialize_der(context);
    		Ok(data.into())
    	}

    	pub fn sign_compact(&self, message: &Message) -> Result<CompactSignature, Error> {
    		let context = &SECP256K1;
    		let secret = try!(key::SecretKey::from_slice(context, &*self.secret));
    		let message = try!(SecpMessage::from_slice(&**message));
    		let signature = try!(context.sign_recoverable(&message, &secret));
    		let (recovery_id, data) = signature.serialize_compact(context);
    		let recovery_id = recovery_id.to_i32() as u8;
    		let mut signature = H520::default();
    		signature[1..65].copy_from_slice(&data[0..64]);
    		if self.compressed {
    			signature[0] = 27 + recovery_id + 4;
    		} else {
    			signature[0] = 27 + recovery_id;
    		}
    		Ok(signature.into())
    	}
    }

    impl DisplayLayout for Private {
    	type Target = Vec<u8>;

    	fn layout(&self) -> Self::Target {
    		let mut result = vec![];
    		let network_byte = match self.network {
    			Network::Mainnet => 128,
    			Network::Testnet => 239,
    		};

    		result.push(network_byte);
    		result.extend(&*self.secret);
    		if self.compressed {
    			result.push(1);
    		}
    		let cs = checksum(&result);
    		result.extend_from_slice(&*cs);
    		result
    	}

    	fn from_layout(data: &[u8]) -> Result<Self, Error> where Self: Sized {
    		let compressed = match data.len() {
    			37 => false,
    			38 => true,
    			_ => return Err(Error::InvalidPrivate),
    		};

    		if compressed && data[data.len() - 5] != 1 {
    			return Err(Error::InvalidPrivate);
    		}

    		let cs = checksum(&data[0..data.len() - 4]);
    		if &data[data.len() - 4..] != &*cs {
    			return Err(Error::InvalidChecksum);
    		}

    		let network = match data[0] {
    			128 => Network::Mainnet,
    			239 => Network::Testnet,
    			_ => return Err(Error::InvalidPrivate),
    		};

    		let mut secret = Secret::default();
    		secret.copy_from_slice(&data[1..33]);

    		let private = Private {
    			network: network,
    			secret: secret,
    			compressed: compressed,
    		};

    		Ok(private)
    	}
    }

    impl fmt::Debug for Private {
    	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    		try!(writeln!(f, "network: {:?}", self.network));
    		try!(writeln!(f, "secret: {}", self.secret.to_hex::<String>()));
    		writeln!(f, "compressed: {}", self.compressed)
    	}
    }

    impl fmt::Display for Private {
    	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    		self.layout().to_base58().fmt(f)
    	}
    }

    impl FromStr for Private {
    	type Err = Error;

    	fn from_str(s: &str) -> Result<Self, Error> where Self: Sized {
    		let hex = try!(s.from_base58().map_err(|_| Error::InvalidPrivate));
    		Private::from_layout(&hex)
    	}
    }

    impl From<&'static str> for Private {
    	fn from(s: &'static str) -> Self {
    		s.parse().unwrap()
    	}
    }

    #[cfg(test)]
    mod tests {
    	use hash::H256;
    	use network::Network;
    	use super::Private;

    	#[test]
    	fn test_private_to_string() {
    		let private = Private {
    			network: Network::Mainnet,
    			secret: H256::from_reversed_str("063377054c25f98bc538ac8dd2cf9064dd5d253a725ece0628a34e2f84803bd5"),
    			compressed: false,
    		};

    		assert_eq!("5KSCKP8NUyBZPCCQusxRwgmz9sfvJQEgbGukmmHepWw5Bzp95mu".to_owned(), private.to_string());
    	}

    	#[test]
    	fn test_private_from_str() {
    		let private = Private {
    			network: Network::Mainnet,
    			secret: H256::from_reversed_str("063377054c25f98bc538ac8dd2cf9064dd5d253a725ece0628a34e2f84803bd5"),
    			compressed: false,
    		};

    		assert_eq!(private, "5KSCKP8NUyBZPCCQusxRwgmz9sfvJQEgbGukmmHepWw5Bzp95mu".into());
    	}
    }

# Help

## Keyboard Shortcuts

`?`
  Show this help dialog
`S`
  Focus the search field
`↑`
  Move up in search results
`↓`
  Move down in search results
`↹`
  Switch tab
`⏎`
  Go to active search result
`+`
  Expand all sections
`-`
  Collapse all sections

## Search Tricks

Prefix searches with a type followed by a colon (e.g. `fn:`) to restrict the search to a given type.

Accepted types are: `fn`, `mod`, `struct`, `enum`, `trait`, `type`, `macro`, and `const`.

Search functions by type signature (e.g. `vec -> usize` or `* -> vec`)

Search multiple things at once by splitting your query with comma (e.g. `str,u8` or `String,struct:Vec,test`)