Skip to content

Latest commit

 

History

History
26 lines (12 loc) · 1020 Bytes

faq.md

File metadata and controls

26 lines (12 loc) · 1020 Bytes

FAQ

Why does this use MD5, SHA3, Keccak256?

Basically they're more simple & faster than SHA256, good to demonstrates legacy hashing mechanisms. However, MD5 is insecure due to vulnerabilities like collision attacks, making it unsuitable for real-world blockchain applications.

If you get this well, you can add SHA256 to your own Proof-of-Work

How do I get sigscript?

Sigscript is signed data from Alice. Look at runtime/src/utxo.rs:346 and scripts/generate-signature/generate-signature.js:14 to explore how it works.

How does it maintain balance of wallet?

Every time a wallet makes transfer UTXO, the input(s) UTXO will be removed, replaced for outputs UTXO. Please read the scenario.

In this case:

  • Alice UTXO initial balance was removed
  • After invoke spend extrinsic, state contains 2 new UTXOs, 1 for Alice rest UTXO balance, 1 for Bob new UTXO balance.
  • Absolutely, the logic does verify that total output spend must be less than total input spend