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legacy::Script::address

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This is the counterpart to legacy::TransparentAddress::script.
This commit is contained in:
Jack Grigg 2019-07-31 16:17:08 +01:00
parent 3584485516
commit ff5775418b
No known key found for this signature in database
GPG Key ID: 9E8255172BBF9898
1 changed files with 29 additions and 2 deletions
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31
zcash_primitives/src/legacy.rs
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@ -38,6 +38,31 @@ impl Script {
pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> { pub fn write<W: Write>(&self, mut writer: W) -> io::Result<()> {
Vector::write(&mut writer, &self.0, |w, e| w.write_u8(*e)) Vector::write(&mut writer, &self.0, |w, e| w.write_u8(*e))
} }
/// Returns the address that this Script contains, if any.
pub fn address(&self) -> Option<TransparentAddress> {
if self.0.len() == 25
&& self.0[0] == OpCode::Dup as u8
&& self.0[1] == OpCode::Hash160 as u8
&& self.0[2] == 0x14
&& self.0[23] == OpCode::EqualVerify as u8
&& self.0[24] == OpCode::CheckSig as u8
{
let mut hash = [0; 20];
hash.copy_from_slice(&self.0[3..23]);
Some(TransparentAddress::PublicKey(hash))
} else if self.0.len() == 23
&& self.0[0] == OpCode::Hash160 as u8
&& self.0[1] == 0x14
&& self.0[22] == OpCode::Equal as u8
{
let mut hash = [0; 20];
hash.copy_from_slice(&self.0[2..22]);
Some(TransparentAddress::Script(hash))
} else {
None
}
}
} }
impl Shl<OpCode> for Script { impl Shl<OpCode> for Script {
@ -151,7 +176,8 @@ mod tests {
0x76, 0xa9, 0x14, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x76, 0xa9, 0x14, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04,
0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x88, 0xac, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x04, 0x88, 0xac,
] ]
) );
assert_eq!(addr.script().address(), Some(addr));
} }
#[test] #[test]
@ -163,6 +189,7 @@ mod tests {
0xa9, 0x14, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0xa9, 0x14, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07,
0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x87, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x07, 0x87,
] ]
) );
assert_eq!(addr.script().address(), Some(addr));
} }
} }