blockchain-project

Bitcoin Full node에서 진행되는 트랜잭션 검증을 흉내내는 가상의 스택 기반 실행 엔진 설계, 구현
P2PKH, P2SH, Multisignature 방식의 스크립트를 실행시켜 결과를 도출

Structure

주요 기능

Full Node
트랜잭션 검증
UTXO set 수정
Query Process 질의에 응답
Execute Engine
하나의 트랜잭션 처리
Amount 검증 (스택 공간을 가지는 Operator 인스턴스로)
Script 검증

      public static boolean validate(Transaction transaction) {
          return validateAmount(transaction) && validateScript(transaction);
      }
      
      private static boolean validateScript(Transaction transaction) {
        // 검증마다 새로운 stack 할당하기 위해 Operator 객체 생성
        String lockingScript = transaction.getInput().getLockingScript();
        String unlockingScript = transaction.getUnlockingScript();
        String prevTxHash = transaction.getInput().getPtxHash();
        Operator operator = new Operator(lockingScript, unlockingScript, prevTxHash);
      
        return operator.validate();
      }

Operator
locking script + unlocking script 실행
validate -> start -> execute 흐름

validate: P2SH 분기
- locking script에 OP_CHECKFINALRESULT 없으면 P2SH 방식인 것을 이용
- unlocking script에서 scriptX 추출
start: IF ELSE ENDIF 분기
- skip 변수로 해결
execute: OP_CODE 실행
- OP 코드가 아니라면 stack에 push
- DUP, HASH, EQUAL, EQAULVERIFY
- CHECKSIG, CHECKSIGVERIFY
- CHECKMULTISIG, CHECKMULTISIGVERIFY
Repository
UTXO set, Transaction set 관리
Singleton 패턴으로 구현
- query process 개발 과정에서 멀티 스레드 환경 안정성을 위해 적용

Query Process

FullNode와 멀티스레드 환경으로 병렬 실행
FullNode static method로 질의 요청
(Full Node가 transaction 처리중) lock 획득 못할시 busy waiting
응답받은 SnapShot 출력

=========snapshot transactions=========
transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, validity check:passed
transaction: Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, validity check:passed
================================
=========snapshot utxo=========
tx3,  0,  100,  OP_DUP OP_HASH ZYcPB3VLkkW6XIa6ds1paI5nuqn7iLcYiZtX3BjZHqk= OP_EQUALVERIFY
tx4,  0,  100,  OP_DUP OP_HASH W7Aei6dgXgLKeVtZ0JlDrvq4iImHr2P9TODNDGiij/s= OP_EQUALVERIFY
tx4,  1,  200,  OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 0, 30, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 1, 60, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
================================

Data (transactions.txt, UTXOes.txt)
transactions.txt에는 <--> 대신 실제 값을 넣음
예제

P2PKH

tx:
input: tx1, 0, 100, OP_DUP OP_HASH <public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT, <signature> <public key>
output, 0: 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
output, 1: 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT

Alice가 물건을 사는 상황 (buyer : Alice)
이전 transaction 내용 hash값이 tx1이라고 가정

MULTISIG

tx:
input: tx2, 0, 100, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT, <signature1> <signature2>
output, 0: 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
output, 1: 40, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT

3명으로 구성된 조직에서 Alice와 Bob의 signature로 물건을 사는 상황
3개의 key pair 생성 후 valid한 signature 2개 삽입

P2SH

scriptX
OP_IF
    OP_DUP OP_HASH <public key hash> OP_EQUALVERIFY OP_CHECKSIG
OP_ELSE
    2 <Alice pubKey> <Bob pubKey> <pubKey3> 3 OP_CHECKMULTISIG
OP_ENDIF
    OP_CHECKFINALRESULT

Alice가 spend하는 상황 (IF로 분기) <br>
unlockingScript : <Alice signature> <AlicePubKey> 1 <script X> <br>

tx:
input: tx3, 0, 100, OP_DUP OP_HASH <script X hash> OP_EQUALVERIFY, <Alice signature> <AlicePubKey> 1 <script X>
output, 0: 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
output, 1: 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT

Alice와 Bob이 함께 spend하는 상황 (ELSE로 분기) 
unlockingScript : <Alice signature> <Bob signature> 0 <scriptX>

tx:
input: tx3, 0, 100, OP_DUP OP_HASH <script X hash> OP_EQUALVERIFY, <Alice signature> <Bob signature> 0 <script X>
output, 0: 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
output, 1: 10, OP_DUP OP_HASH <Alice public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
output, 2: 30, OP_DUP OP_HASH <Bob public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT

Tests

핵심 로직인 Operator Class 위주로 test
다음으로 입출력 오류를 최소화 하기 위해 Repository test

전체 실행 결과

transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=
    input=tx1, 0, 100, OP_DUP OP_HASH +KxaNOBK9unLhNUWh76R+C+mUB/NZSOoS24q7hdOtsU= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT,  MEUCIAQGSjvvcYBrlwmJy8FMwbr9bVUo823LHXaBpC+sbHgpAiEAibuAYu7RQ/6qIEjdhgD5zo8+a2qd1PO+W+aQJGnypew= MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEc57NsPWZoeM5GBUto5lZ3fypa8WZTgDYX2AcUd+5eoMk/pCxu7Ocljm1h5ixZCKO+VbJHLmgC5ut/G3o2b88Dw==
    output: 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    output: 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    validity check: passed

=========snapshot transactions=========
transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, validity check:passed
================================
=========snapshot utxo=========

tx2,  0,  100,  2 MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEyLswFgpCwtdkhT/jRw+/YmXov9jZ8BJNIerCjUwidlnKbw4X7LRbwJlLjm3lYYmQzdNXxjljZ5m932MDP6UzAQ== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEluoP2Xj6RnmcXkWBN3SAlJ5ce7Wtd5RVLV5pDK8bpUrgcbLaF6tHb0UuP7l8YWZMrJgIhjhGUHK72IdFINPicA== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEHKiPIdVVWmU0xTR1ropdJdYS5uNKPSV/RiDRxSO++aPmL/7RzQX9ihE+ZdiX/dkNVxzspafWQkstnAzHvSCbLQ== 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
tx3,  0,  100,  OP_DUP OP_HASH ZYcPB3VLkkW6XIa6ds1paI5nuqn7iLcYiZtX3BjZHqk= OP_EQUALVERIFY
tx4,  0,  100,  OP_DUP OP_HASH W7Aei6dgXgLKeVtZ0JlDrvq4iImHr2P9TODNDGiij/s= OP_EQUALVERIFY
tx4,  1,  200,  OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
================================


transaction: Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=
    input=tx2, 0, 100, 2 MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEyLswFgpCwtdkhT/jRw+/YmXov9jZ8BJNIerCjUwidlnKbw4X7LRbwJlLjm3lYYmQzdNXxjljZ5m932MDP6UzAQ== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEluoP2Xj6RnmcXkWBN3SAlJ5ce7Wtd5RVLV5pDK8bpUrgcbLaF6tHb0UuP7l8YWZMrJgIhjhGUHK72IdFINPicA== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEHKiPIdVVWmU0xTR1ropdJdYS5uNKPSV/RiDRxSO++aPmL/7RzQX9ihE+ZdiX/dkNVxzspafWQkstnAzHvSCbLQ== 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT,  MEUCIQDcCrtm9qCexNG4DFa0nVU9AvQ3c/8/WoFbAD2bzg8hbgIgTiMZFGBDGiq4itoMQmKHODBqbm+7jyIa1ooG+rs644Y= MEUCID9BzF9tcSxjtrQpilIAaqNBPq/agyUSsjqJikwbTBRNAiEAuAexgjHIs5Bet0HR/W02apqikzfs3bqb54uTW7wJW90=
    output: 0, 30, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    output: 1, 60, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
    validity check: passed

=========snapshot transactions=========
transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, validity check:passed
transaction: Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, validity check:passed
================================
=========snapshot utxo=========

tx3,  0,  100,  OP_DUP OP_HASH ZYcPB3VLkkW6XIa6ds1paI5nuqn7iLcYiZtX3BjZHqk= OP_EQUALVERIFY
tx4,  0,  100,  OP_DUP OP_HASH W7Aei6dgXgLKeVtZ0JlDrvq4iImHr2P9TODNDGiij/s= OP_EQUALVERIFY
tx4,  1,  200,  OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 0, 30, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 1, 60, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
================================


transaction: EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=
    input=tx3, 0, 100, OP_DUP OP_HASH ZYcPB3VLkkW6XIa6ds1paI5nuqn7iLcYiZtX3BjZHqk= OP_EQUALVERIFY,  MEQCIA2r90A8SQ63lcKsRLYSQKWJS29F2yLyl03r0tuv337yAiAv8XKyxzy5kIsYQMouTLv+FLCT7lX4rVyi7dy7EAFjVA== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEwk5N5RNEsq8nUv+av76f+jlyOm7Nyxe+megCBBzQYNjfy9Ssj679g2UCwhDECX8CqrsiLmvXUvr4HWuixq1rjA== 1 OP_IF OP_DUP OP_HASH P3ODGKo2ApXqlVlQZIUqWnMEX9hSl/DoaQxwO5MAHag= OP_EQUALVERIFY OP_CHECKSIG OP_ELSE 2 MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEwk5N5RNEsq8nUv+av76f+jlyOm7Nyxe+megCBBzQYNjfy9Ssj679g2UCwhDECX8CqrsiLmvXUvr4HWuixq1rjA== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEimUjGCL8WQIvQEzhGYekm6ABwigs36koOBOld09Y4TW9IJVRbP2ARY0aSipVcM+0qX6knayS9GL6rIaQEVTcMw== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEGPcJIUlTJ6WoyNg7szOqLQTW8Y77xE+MlIk4J7dLN2XusBVzsNysgewcu1HE8ByeCI8mkqeScEsHumcKSN/6zQ== 3 OP_CHECKMULTISIG OP_ENDIF OP_CHECKFINALRESULT
    output: 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    output: 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    validity check: passed

=========snapshot transactions=========
transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, validity check:passed
transaction: Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, validity check:passed
transaction: EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, validity check:passed
================================
=========snapshot utxo=========

tx4,  0,  100,  OP_DUP OP_HASH W7Aei6dgXgLKeVtZ0JlDrvq4iImHr2P9TODNDGiij/s= OP_EQUALVERIFY
tx4,  1,  200,  OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 0, 30, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 1, 60, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
================================


transaction: 9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=
    input=tx4, 0, 100, OP_DUP OP_HASH W7Aei6dgXgLKeVtZ0JlDrvq4iImHr2P9TODNDGiij/s= OP_EQUALVERIFY,  MEUCIDVRNZGlRYo8OyZHEPkYX3sp/KUE9SHfplvoeJBTocI6AiEA2G627RgQIBmd6pUxowP5bj6HmsviNfE4w2UcooszNbg= MEYCIQDqiqzaeTQefYKInGklZnJttFV5YG9IOlj3YlT8GKJRAgIhALQc1Fc+A+fAVQ1gTKFySaYFwVc2s8kkEsgkwUyfjT3r 0 OP_IF OP_DUP OP_HASH XasEIUdrG0gmg/F9TQnp0ttLpRz/NT0JmldRYTzJuq4= OP_EQUALVERIFY OP_CHECKSIG OP_ELSE 2 MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEbqYWYZLVbbllJCgQYFt/vgxdBVt5Ik/Q1dn6zMa6qHW03LCpMcwD+kN02OvfxSYWppGVKLm6Aso/nZ3cKNvB9g== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEXrczK8cmrbHuB9xJO+nJwHt2/rB66Gj3ScabYDCsjMLzlrgFbLgi5UuHcsvuD97r7n14YLihSlVZyQ50LcxN4g== MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEdVNF/HMzO/+JI5NambXLQpG1oCyE4W+RoV+RadIfVNSrkdyClWG2lvE/GrNXOUquqH603Y8Fnv9La+ynCf+AKA== 3 OP_CHECKMULTISIG OP_ENDIF OP_CHECKFINALRESULT
    output: 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    output: 1, 10, OP_DUP OP_HASH <Alice public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    output: 2, 30, OP_DUP OP_HASH <Bob public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    validity check: passed

=========snapshot transactions=========
transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, validity check:passed
transaction: Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, validity check:passed
transaction: EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, validity check:passed
transaction: 9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, validity check:passed
================================
=========snapshot utxo=========

tx4,  1,  200,  OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 0, 30, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 1, 60, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, 1, 10, OP_DUP OP_HASH <Alice public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, 2, 30, OP_DUP OP_HASH <Bob public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
================================


transaction: 76WjXUzEoWowSvUTd7hEAXRBNvY8GFQn6k1OOJGCFOA=
    input=tx4, 1, 200, OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT,  MEUCIAQGSjvvcYBrlwmJy8FMwbr9bVUo823LHXaBpC+sbHgpAiEAibuAYu7RQ/6qIEjdhgD5zo8+a2qd1PO+W+aQJGnypew= MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEc57NsPWZoeM5GBUto5lZ3fypa8WZTgDYX2AcUd+5eoMk/pCxu7Ocljm1h5ixZCKO+VbJHLmgC5ut/G3o2b88Dw==
    output: 0, 200, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    output: 1, 0, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
    validity check: failed
        failed at: OP_EQUALVERIFY 검증 실패

=========snapshot transactions=========
transaction: ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, validity check:passed
transaction: Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, validity check:passed
transaction: EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, validity check:passed
transaction: 9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, validity check:passed
transaction: 76WjXUzEoWowSvUTd7hEAXRBNvY8GFQn6k1OOJGCFOA=, validity check:failed
================================
=========snapshot utxo=========

tx4,  1,  200,  OP_DUP OP_HASH tofRoa1lF3313xy745y9hpgz/WYd1W/iKR/dR+Oz7pc= OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
ZNzP2roAefHCUKAI+wSSCv3y8/J/uHQNbzhCHIO9rbY=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 0, 30, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
Rm2gsKR8JHKGfv/HQVbvak/uKkp6/hobHEH42WTIO5E=, 1, 60, 2 <pubKey1> <pubKey2> <pubKey3> 3 OP_CHECKMULTISIG OP_CHECKFINALRESULT
EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
EIJ3vWixQdmma0TnheGJKUFiXPvCSLDDni4FI/os97s=, 1, 40, OP_DUP OP_HASH <buyer's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, 0, 50, OP_DUP OP_HASH <seller's public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, 1, 10, OP_DUP OP_HASH <Alice public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
9WHlJlAXegkbjgCnMWo8OlePesZ63Jsahi1mVvsYhyg=, 2, 30, OP_DUP OP_HASH <Bob public key hash> OP_EQUALVERIFY OP_CHECKSIG OP_CHECKFINALRESULT
================================

폴더 구조

src/
├── main/
│   ├── java/
│   │   ├── com.gothaxcity/
│   │   │   ├── domain/         // Utxo 및 Transaction 클래스 정의
│   │   │   ├── repository/     // Utxo 및 Transaction 저장소 관리
│   │   │   ├── service/        // Operator, FullNode, ExecuteEngine 클래스
│   │   │   ├── util/           // SHA256 및 ECDSA 암호화 기능
│   ├── resources/
│   │   ├── UTXOes.txt          // 현재 UTXO 상태 저장 파일
│   │   ├── transactions.txt    // 트랜잭션 집합 파일

Name		Name	Last commit message	Last commit date
Latest commit History 46 Commits
bitcoin-proj		bitcoin-proj
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md

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