Poseidon

Computes the Poseidon hash of two field elements.

Function Signature

func Poseidon(a, b *felt.Felt) *felt.Felt

Parameters

• a (*felt.Felt): First field element
• b (*felt.Felt): Second field element

Returns

• *felt.Felt: The Poseidon hash

Usage Example

a := new(felt.Felt).SetUint64(123)
b := new(felt.Felt).SetUint64(456)
hash := curve.Poseidon(a, b)
fmt.Printf("Hash: %s\n", hash.String())

Expected Output

Poseidon Hash:
  Input a: 0x7b
  Input b: 0x1c8
  Hash: 0x5b79b5a2c3fae5ffe6f223e1bb26e82f6c14415569bf83500b7ebbf137064ea

Notes

• Poseidon is more efficient than Pedersen for SNARK-friendly operations
• Suitable for use in ZK-STARKs

Related Functions

• PoseidonArray
• Pedersen