System architecture

Data models, migrations and the decisions that are expensive to reverse.

18 articlesLatest 2 Nov 2026

31 Oct 2026

How 50 pre-signed EIP-7702 authorizations emptied a Binance hot wallet, what Binance has said, and the signer checks that would have refused them.

18 Oct 2026

The NIST P-256 seed came from lrand48 and a 1997 timestamp. Rebuild it in Python and C, and see what it means for the ECDSA keys you use.

System architecture articles