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52148be547
Similar to what we have in Rust, this adds a function that detects "known" fields (Goldilocks and BN254 for now). Planning to use that in #1310 to assert that the field extension module is only used with compatible fields.
24 lines
724 B
Rust
24 lines
724 B
Rust
/// A function that returns the current field modulus as an integer.
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/// The actual implementation is replaced by a built-in function.
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let modulus: -> int = [];
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let GOLDILOCKS_PRIME: int = 0xffffffff00000001;
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let BN254_PRIME: int = 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001;
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/// All known fields
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enum KnownField {
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Goldilocks,
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BN254
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}
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/// Checks whether the function is called in a context where it is operating on
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/// any of the known fields.
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let known_field: -> Option<KnownField> = || if modulus() == GOLDILOCKS_PRIME {
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Option::Some(KnownField::Goldilocks)
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} else {
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if modulus() == BN254_PRIME {
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Option::Some(KnownField::BN254)
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} else {
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Option::None
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}
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}; |