Day 8: Proof-of-Work

Lecture Topics

• notes
• blocks
• proof-of-work (PoW)
• hash chains/block chains

Problems

• required: new block addition (and PoW):
  • block validation (without hashing):
    • Blk.validate_and_update_utxos
  • computing block hashes:
    • In.to_bytes
    • Out.to_bytes
    • Tx.to_bytes
    • Blk.to_bytes
    • Blk.get_hash
  • block addition:
    • Blk.is_hash_valid
    • BlkChain.add_block