HW about bitcoin question 1 A. B. C. D. Q1.(16 points) Consider the following 4
ID: 3708994 • Letter: H
Question
HW about bitcoin question 1
A. B. C. D.
Q1.(16 points) Consider the following 4 hypothetical sets of Bitcoin transactions In each case: (i) state whether transaction 4 is VALID or INVALID and (ii) explain why or why not 1 Inputs: Ø Outputs: 25.0 Alice Inputs: 0 Outputs: 25.0?Alice 2 Inputs: 1[0] 2Inputs: 1[0] 3 Inputs: 2[1] 4 Inputs: 212] Outputs: 10.0+Bob, Charlie-+5.0, 10.0-Alice Outputs: 10.0-Bob, Charlie-+5.0, 10.0-Alice SIGNED(Alice SIGNED(Alice 3 Inputs: 2[1] Outputs: 4.0?Diana, 1.0?Charlie Outputs: 4.0 Diana, 1.0- Charlie SIGNED(Charlie SIGNED(Charlie 4 Inputs: 2[0] Outputs: 9.0-Eloise, 2.0-Alice Outputs: 8.0 Eloise, 2.0-Alice SIGNED(Alice) SIGN lice Inputs: 0 Outputs: 25.0-Alice Inputs: 0 Outputs: 25.0-Alice 2 Inputs: 110] 2 Inputs: 1[0] Outputs: 10.0 Bob, Charlie-5.0, 10.0-Alice Outputs: 10.0-Bob, Charlie-+5.0, 10.0 Alice SIGNED(Alice Alice Inputs: 2[1] Outputs: 4.0?Diana, 1.0?Charlie Inputs: 2[1] Outputs: 4.0-Diana, 1.0-Charlie SIGNED(Charlie SIGNED(Charlie 4Inputs: 2[0] 4Inputs: 3[0] Outputs: 8.0? Eloise, 2.0?Alice Outputs: 4.0 Eloise SIGNED(Bob SIGNED(Charlie)Explanation / Answer
A. It is Invalid:
Explanation: The last line 9 --> Eloise, 2 --> Alice. Alice has 10, but the transaction worth 11. So he can't do that transaction.
B. It is Valid:
Explanation: The last line 8 --> Eloise, 2 --> Alice. Alice has 10. So he can do that transaction.
C. It is Invalid:
Explanation: In the line: 8 --> Eloise, 2 --> Alice. In the previous transaction Alice and Bob both hass 10 each, but this transaction is made by BOB who gave 8 to Eloise. so there should be 8.0 --> Eloise 2.0 --> Bob.
D. It is Invalid:
Explanation: In the last step 4 --> Eloise by Charlie. But charlie doesn't have enough credits, he has only. Hence it is invalid.
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