Problem 4 :

Additional information

  • Each block verifies from 1 to 4 transactions. Each transaction to be verified can be based on already verified transactions and transactions FROM THE CURRENT BLOCK based on verified transactions.
  • The order of transactions hash in ctxHash corresponds with the order of creation.
  • All transactions are already verified in the end of trading.
  • A tip to reduce exhaustive search: The transaction from the example has been verified by the block with height=1.
  • Two transactions into input transactions (into inputTX) are separated with COMMA.
  • At the beginning each person has 5 flowers FOR SALE.
  • The second tip: All hashes of transactions that are verified by the block from the example are correspond to hashes of transactions verified by the block with height=1 into the sought-for blockchain.
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