eth2.0-specs/test_generators/bls/README.md

BLS Test Generator

Explanation of BLS12-381 type hierarchy The base unit is bytes48 of which only 381 bits are used

• FQ: uint381 modulo field modulus
• FQ2: (FQ, FQ)
• G2: (FQ2, FQ2, FQ2)

Resources

• Eth2.0 spec
• Finite Field Arithmetic
• Chapter 2 of Elliptic Curve Cryptography. Darrel Hankerson, Alfred Menezes, and Scott Vanstone
• Zcash BLS parameters
• Trinity implementation

Comments

Compared to Zcash, Ethereum specs always requires the compressed form (c_flag / most significant bit always set). Also note that pubkeys and privkeys are reversed.