66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
package bn256
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import (
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"fmt"
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"math/big"
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"github.com/consensys/gnark-crypto/ecc/bn254"
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)
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// GT is the affine representation of a GT field element.
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//
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// Note: GT is not explicitly used in mainline code.
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// It is needed for fuzzing.
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type GT struct {
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inner bn254.GT
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}
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// Pair compute the optimal Ate pairing between a G1 and
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// G2 element.
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//
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// Note: This method is not explicitly used in mainline code.
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// It is needed for fuzzing. It should also be noted,
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// that the output of this function may not match other
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func Pair(a_ *G1, b_ *G2) *GT {
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a := a_.inner
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b := b_.inner
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pairingOutput, err := bn254.Pair([]bn254.G1Affine{a}, []bn254.G2Affine{b})
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if err != nil {
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// Since this method is only called during fuzzing, it is okay to panic here.
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// We do not return an error to match the interface of the other bn256 libraries.
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panic(fmt.Sprintf("gnark/bn254 encountered error: %v", err))
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}
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return >{
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inner: pairingOutput,
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}
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}
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// Unmarshal deserializes `buf` into `g`
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//
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// Note: This method is not explicitly used in mainline code.
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// It is needed for fuzzing.
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func (g *GT) Unmarshal(buf []byte) error {
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return g.inner.SetBytes(buf)
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}
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// Marshal serializes the point into a byte slice.
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//
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// Note: This method is not explicitly used in mainline code.
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// It is needed for fuzzing.
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func (g *GT) Marshal() []byte {
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bytes := g.inner.Bytes()
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return bytes[:]
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}
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// Exp raises `base` to the power of `exponent`
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//
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// Note: This method is not explicitly used in mainline code.
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// It is needed for fuzzing.
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func (g *GT) Exp(base GT, exponent *big.Int) *GT {
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g.inner.Exp(base.inner, exponent)
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return g
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}
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