#[repr(u64)]
pub enum Parameters { Bn254X5 = 0, }
Expand description

Configuration parameters for the Poseidon hash function.

The parameters of each configuration consist of:

  • Elliptic curve type: This defines the prime field in which the cryptographic operations are conducted.
  • S-Box: The substitution box used in the cryptographic rounds.
  • Full rounds: The number of full transformation rounds in the hash function.
  • Partial rounds: The number of partial transformation rounds in the hash function.

Each configuration variant’s name is composed of its elliptic curve type followed by its S-Box specification.

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Bn254X5 = 0

Configuration using the Barreto–Naehrig curve with an embedding degree of 12, defined over a 254-bit prime field.

Configuration Details:

  • S-Box: ( x^5 )
  • Width: ( 2 \leq t \leq 13 )
  • Inputs: ( 1 \leq n \leq 12 )
  • Full rounds: 8
  • Partial rounds: Depending on width: [56, 57, 56, 60, 60, 63, 64, 63, 60, 66, 60, 65]

Trait Implementations§

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impl TryFrom<u64> for Parameters

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type Error = PoseidonSyscallError

The type returned in the event of a conversion error.
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fn try_from( value: u64 ) -> Result<Parameters, <Parameters as TryFrom<u64>>::Error>

Performs the conversion.

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Returns the argument unchanged.

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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