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Make pk_d validity an invariant of PaymentAddress

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Introduces a PaymentAddress::from_parts constructor, and getters for
the diversifier and pk_d fields (which are now private).
This commit is contained in:
Jack Grigg
2019-08-23 23:08:09 +01:00
parent 86142d044c
commit abbd43ff57
9 changed files with 85 additions and 62 deletions
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36
zcash_client_backend/src/encoding.rs
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@@ -110,10 +110,11 @@ pub fn decode_extended_full_viewing_key(
/// 0xbc, 0xe5,
/// ]);
///
/// let pa = PaymentAddress {
/// diversifier: Diversifier([0u8; 11]),
/// pk_d: edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
/// };
/// let pa = PaymentAddress::from_parts(
/// Diversifier([0u8; 11]),
/// edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
/// )
/// .unwrap();
///
/// assert_eq!(
/// encode_payment_address(HRP_SAPLING_PAYMENT_ADDRESS, &pa),
@@ -147,10 +148,11 @@ pub fn encode_payment_address(hrp: &str, addr: &PaymentAddress<Bls12>) -> String
/// 0xbc, 0xe5,
/// ]);
///
/// let pa = PaymentAddress {
/// diversifier: Diversifier([0u8; 11]),
/// pk_d: edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
/// };
/// let pa = PaymentAddress::from_parts(
/// Diversifier([0u8; 11]),
/// edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
/// )
/// .unwrap();
///
/// assert_eq!(
/// decode_payment_address(
@@ -193,10 +195,11 @@ mod tests {
0xbc, 0xe5,
]);
let addr = PaymentAddress {
diversifier: Diversifier([0u8; 11]),
pk_d: edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
};
let addr = PaymentAddress::from_parts(
Diversifier([0u8; 11]),
edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
)
.unwrap();
let encoded_main =
"zs1qqqqqqqqqqqqqqqqqrjq05nyfku05msvu49mawhg6kr0wwljahypwyk2h88z6975u563j8nfaxd";
@@ -237,10 +240,11 @@ mod tests {
0xbc, 0xe5,
]);
let addr = PaymentAddress {
diversifier: Diversifier([1u8; 11]),
pk_d: edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
};
let addr = PaymentAddress::from_parts(
Diversifier([1u8; 11]),
edwards::Point::<Bls12, _>::rand(rng, &JUBJUB).mul_by_cofactor(&JUBJUB),
)
.unwrap();
let encoded_main =
encode_payment_address(constants::mainnet::HRP_SAPLING_PAYMENT_ADDRESS, &addr);