PISA demo pairs Payjoin with CISA to cut Bitcoin transaction fees
- —PISA combines Payjoin (BIP77/78) with cross-input signature aggregation (CISA)
- —Estimated savings on transaction size and fees range from 7% to 26%
- —Largest gains apply to multi-input payments such as CoinJoin and Payjoin
- —Draft BIPs 458 and 459 are not yet activated; code is live at pisa.payjoin.org
Why it matters: If BIP 458 and 459 are activated, private collaborative Bitcoin payments could become significantly cheaper.
Source: Crypto Briefing