Usando TwoOfThree.sh Gist de Gavin Anderson que se encuentra aquí: https://gist.github.com/gavinandresen/3966071
¿Es posible verificar que la primera transacción signraw "parcial" sea válida a partir de la clave pública conocida antes de realizar la segunda transacción signraw? Mi objetivo es estar lo más cerca posible de la certeza de que la red aceptará la transacción antes de enviarla. En este escenario, ya sabría que los bitcoins son gastables por la dirección multisig en cuestión y que la tarifa de transacción correspondiente se incluyó en la transacción.
Los dos pasos están a continuación. ¡Ayuda apreciada!
# ... Now I can partially sign it using one private key:
./bitcoind signrawtransaction '0100000001aca7f3b45654c230e0886a57fb988c3044ef5e8f7f39726d305c61d5e818903c0000000000ffffffff0140420f00000000001976a914ae56b4db13554d321c402db3961187aed1bbed5b88ac00000000' '[{"txid":"3c9018e8d5615c306d72397f8f5eef44308c98fb576a88e030c25456b4f3a7ac","vout":0,"scriptPubKey":"a914f815b036d9bbbce5e9f2a00abd1bf3dc91e9551087","redeemScript":"52410491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f864104865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec687441048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d4621353ae"}]' '["5JaTXbAUmfPYZFRwrYaALK48fN6sFJp4rHqq2QSXs8ucfpE4yQU"]'
{
"hex" : "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",
"complete" : false
}
# ... and then take the "hex" from that and complete the 2-of-3 signatures using one of
# the other public keys (note the "hex" result getting longer):
./bitcoind signrawtransaction '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' '[{"txid":"3c9018e8d5615c306d72397f8f5eef44308c98fb576a88e030c25456b4f3a7ac","vout":0,"scriptPubKey":"a914f815b036d9bbbce5e9f2a00abd1bf3dc91e9551087","redeemScript":"52410491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f864104865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec687441048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d4621353ae"}]' '["5JFjmGo5Fww9p8gvx48qBYDJNAzR9pmH5S389axMtDyPT8ddqmw"]'
{
"hex" : "0100000001aca7f3b45654c230e0886a57fb988c3044ef5e8f7f39726d305c61d5e818903c00000000fd5d010048304502200187af928e9d155c4b1ac9c1c9118153239aba76774f775d7c1f9c3e106ff33c0221008822b0f658edec22274d0b6ae9de10ebf2da06b1bbdaaba4e50eb078f39e3d78014730440220795f0f4f5941a77ae032ecb9e33753788d7eb5cb0c78d805575d6b00a1d9bfed02203e1f4ad9332d1416ae01e27038e945bc9db59c732728a383a6f1ed2fb99da7a4014cc952410491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f864104865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec687441048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d4621353aeffffffff0140420f00000000001976a914ae56b4db13554d321c402db3961187aed1bbed5b88ac00000000",
"complete" : true
}
Hasta donde yo sé, no hay una funcionalidad integrada en Bitcoin para verificar las firmas en cada entrada de forma independiente. O todas las firmas son correctas (así se muestra {complete: true}) o hay al menos un valor sin firmar/no válido/de entrada que no se suma a los valores de salida (así se muestra {complete: false}).
El procedimiento será el siguiente:
{txid, vout}a la que se hace referencia del conjunto UTXO o recupere txidy solo obtenga la salida adecuada.valueque es lo que espera (si le importa el valor) y obtenga el archivo scriptPubKey.scriptSigy luego, con la pila resultante, la salida anterior scriptPubKey.Si la parte superior de la pila resultante no es cero (es decir, es TRUE), la entrada está firmada correctamente.
Gabe