Estoy tratando de averiguar cómo derivar el campo de direcciones de un tx serializado. Tomemos por ejemplo esta transacción en la red de prueba
46993a02c0f271e8106159581fd2329d46818b9888b5123290c5d1da1718b8b9
El formato serializado para este tx es
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
el formato json es este:
{
"hex" : "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",
"txid" : "46993a02c0f271e8106159581fd2329d46818b9888b5123290c5d1da1718b8b9",
"version" : 1,
"locktime" : 0,
"vin" : [
{
"txid" : "71d85197037a7760fdf7a1b42861e26234758cf7485cbb27911ccbe0b07e0eb9",
"vout" : 1,
"scriptSig" : {
"asm" : "0 3045022100c2602e5f6bb2a0df006f734493a404f491abade27f2c1a9d0c7c7fd249de00b20220111b273b653dc2d0ec890e10d89d7e7a095fd88e27e588f5a60ba5d80ad3c8bb01 3045022100cc574b83104238d94e8c6abda28d33ce2377c324263bfa62ce6f240fa60356fb0220117970c87c00169630f5f368bf90f0f11ea156a7befdab0299ee4f3577a229ed01 5221031d1f0c5147b30190cc837b180c2e2a09733f4fd5d146809091950a80383e92682103bb7f1955df8f9b52bfaa908a0e968ad019ef5e8b832ae405e6d882aeda10ec5321028ea4acd57ae1abd53260b32d252472691ea4402d9ac9d4d0fb8fb4636544a4d453ae",
"hex" : "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"
},
"sequence" : 4294967295
},
{
"txid" : "71d85197037a7760fdf7a1b42861e26234758cf7485cbb27911ccbe0b07e0eb9",
"vout" : 0,
"scriptSig" : {
"asm" : "0 3045022100b922b6495ce11ab5b8959e0fb97a40bc98011d32b81ece252f2d3bfaf3c34ccf0220194951276272a21c7c0e001d26e68ca9a532927c0c703902ac96a4933824b0e101 3044022100dd7bbfba7d765843580d158bf9ef92ba34798d82a42e0098b8acd229cfd6afc3021f55d516e1913bbce390e6fd251d4da483a05e7cb8e510a02f9c6e2d92e574da01 522103e9b16e8ef73855ffa479d7c1b655f99d6834003c6608210b575a0c6bc6c062632103f12e2f8a3357ba47e8ea91b5ce2325dbc9346e4d2bf8db5d30f9422201bc320e210392a98eb30cb3840e47b3b081f43508da37e499272ede8c95f27b9afca813257953ae",
"hex" : "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"
},
"sequence" : 4294967295
}
],
"vout" : [
{
"value" : 0.00240000,
"n" : 0,
"scriptPubKey" : {
"asm" : "OP_HASH160 5868dadcf00a6fff4cc54752e6e75b046d24aad6 OP_EQUAL",
"hex" : "a9145868dadcf00a6fff4cc54752e6e75b046d24aad687",
"reqSigs" : 1,
"type" : "scripthash",
"addresses" : [
"2N1Jh4cYEFPvw43kZaJovks3hwMWFRUdJ9E"
]
}
},
{
"value" : 0.11055498,
"n" : 1,
"scriptPubKey" : {
"asm" : "OP_HASH160 d81e64eb5a16486b3b5b9dc14eda3412e40ca863 OP_EQUAL",
"hex" : "a914d81e64eb5a16486b3b5b9dc14eda3412e40ca86387",
"reqSigs" : 1,
"type" : "scripthash",
"addresses" : [
"2NCwxMYedhG73QXxDC8jDXY9i5mw4KGcAqo"
]
}
}
],
"blockhash" : "0000000000000fc2902d17140996a27be5d9dfaf8480ea786fa83dc656da72ca",
"confirmations" : 10,
"time" : 1452693415,
"blocktime" : 1452693415
}
Estoy mirando los ejemplos de la guía para desarrolladores , y no parece que el addressescampo en los vout esté realmente serializado. Lo mismo es cierto para reqSigs. ¿Cómo se derivan para la transacción si no se serializan explícitamente dentro de ella?
Los campos que está buscando addressesy reqSigs, de hecho, están serializados en la transacción. En particular, están implícitos en la scriptPubKeycadena binaria.
El scriptPubKeycampo es muy general y admite muchos tipos de pago e incluso datos basura arbitrarios (desafortunadamente).
El formato de pay-to-pubkey-hash (P2PKH) es <OP_DUP> <OP_HASH160> <push 20-byte pubKeyHash> <OP_EQUALVERIFY> <OP_CHECKSIG> [fuente] . El hash de 20 bytes se convierte a través de Base58Check en la cadena de dirección. Y según la documentación a la que se vinculó, reqSigses 1 para P2PKH.
Otro formato para el script es un simple multisig, y esto permitirá reqSigsque sea mayor que 1.
Tenga en cuenta que los datos JSON son producidos por una función llamada DecodeRawTransaction. Esta es la razón por la cual los datos de salida parecen ser diferentes de los datos de entrada, porque se realizó un procesamiento e interpretación adicional sobre ellos.