La razón última sí lo es porque a bitcoin hay que pasarle unas comillas (como parte del JSON) pero normalmente el intérprete de comandos que uses elimina algunas comillas y por tanto hay que "escaparlas"/"citarlas"/"quotearlas" y bla bla bla…
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$ bitcoind createrawtransaction '[{"txid":"deadbeef","vout":0}]' '{"12345Vypv2QSmuRXcciT5oEB27mPbWGeva":2}'
0100000001efbeadde000000000000000000000000000000000000000000000000000000000000000000ffffffff0100c2eb0b000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000
$ bitcoind decoderawtransaction 0100000001efbeadde000000000000000000000000000000000000000000000000000000000000000000ffffffff0100c2eb0b000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000
{
"txid" : "395791169994ef6826a952a21f8329ff132ffdb8c93a148103fc0ec069f2b670",
"version" : 1,
"locktime" : 0,
"vin" : [
{
"txid" : "00000000000000000000000000000000000000000000000000000000deadbeef",
"vout" : 0,
"scriptSig" : {
"asm" : "",
"hex" : ""
},
"sequence" : 4294967295
}
],
"vout" : [
{
"value" : 2.00000000,
"n" : 0,
"scriptPubKey" : {
"asm" : "OP_DUP OP_HASH160 0b5b86d88f06861798ea629265fb793862c4755d OP_EQUALVERIFY OP_CHECKSIG",
"hex" : "76a9140b5b86d88f06861798ea629265fb793862c4755d88ac",
"reqSigs" : 1,
"type" : "pubkeyhash",
"addresses" : [
"12345Vypv2QSmuRXcciT5oEB27mPbWGeva"
]
}
}
]
}
$ bitcoind createrawtransaction '[{"txid":"e9519006d274f9e54edea5a9751f342121e4f24f3c8a37be4ec3151dad53d71c","vout":0}]' '{"12345Vypv2QSmuRXcciT5oEB27mPbWGeva":26}'
01000000011cd753ad1d15c34ebe378a3c4ff2e42121341f75a9a5de4ee5f974d2069051e90000000000ffffffff0100daf89a000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000
$ bitcoind decoderawtransaction 01000000011cd753ad1d15c34ebe378a3c4ff2e42121341f75a9a5de4ee5f974d2069051e90000000000ffffffff0100daf89a000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000
{
"txid" : "7fbb53a6e1b5abbe20cc9aa5142eb5d262ce6991c4db5a543168d1b952df07a2",
"version" : 1,
"locktime" : 0,
"vin" : [
{
"txid" : "e9519006d274f9e54edea5a9751f342121e4f24f3c8a37be4ec3151dad53d71c",
"vout" : 0,
"scriptSig" : {
"asm" : "",
"hex" : ""
},
"sequence" : 4294967295
}
],
"vout" : [
{
"value" : 26.00000000,
"n" : 0,
"scriptPubKey" : {
"asm" : "OP_DUP OP_HASH160 0b5b86d88f06861798ea629265fb793862c4755d OP_EQUALVERIFY OP_CHECKSIG",
"hex" : "76a9140b5b86d88f06861798ea629265fb793862c4755d88ac",
"reqSigs" : 1,
"type" : "pubkeyhash",
"addresses" : [
"12345Vypv2QSmuRXcciT5oEB27mPbWGeva"
]
}
}
]
}
$ bitcoind signrawtransaction 01000000011cd753ad1d15c34ebe378a3c4ff2e42121341f75a9a5de4ee5f974d2069051e90000000000ffffffff0100daf89a000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000
{
"hex" : "01000000011cd753ad1d15c34ebe378a3c4ff2e42121341f75a9a5de4ee5f974d2069051e9000000006a4730440220143a4c3008f8502aa64cfffffffffffffffffffffffffa32d587da603d7e40b3022027ead7f994b52a412de6bbd7246f17ec45612c9829a2034b989c36ad10ec8c46012103bf7f10738469801723bb5bebbf54de86121eb48fca2dcd463805bbf7f54b3130ffffffff0100daf89a000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000",
"complete" : true
}
$ bitcoind decoderawtransaction 01000000011cd753ad1d15c34ebe378a3c4ff2e42121341f75a9a5de4ee5f974d2069051e9000000006a4730440220143a4c3008f8502aa64cfffffffffffffffffffffffffa32d587da603d7e40b3022027ead7f994b52a412de6bbd7246f17ec45612c9829a2034b989c36ad10ec8c46012103bf7f10738469801723bb5bebbf54de86121eb48fca2dcd463805bbf7f54b3130ffffffff0100daf89a000000001976a9140b5b86d88f06861798ea629265fb793862c4755d88ac00000000
{
"txid" : "72ca3d55d2774233c4afc72109607d3ea7269b101ed3008d0823ccf65ec95315",
"version" : 1,
"locktime" : 0,
"vin" : [
{
"txid" : "e9519006d274f9e54edea5a9751f342121e4f24f3c8a37be4ec3151dad53d71c",
"vout" : 0,
"scriptSig" : {
"asm" : "30440220143a4c3008f8502aa64cfffffffffffffffffffffffffa32d587da603d7e40b3022027ead7f994b52a412de6bbd7246f17ec45612c9829a2034b989c36ad10ec8c4601 03bf7f10738469801723bb5bebbf54de86121eb48fca2dcd463805bbf7f54b3130",
"hex" : "4730440220143a4c3008f8502aa64cfffffffffffffffffffffffffa32d587da603d7e40b3022027ead7f994b52a412de6bbd7246f17ec45612c9829a2034b989c36ad10ec8c46012103bf7f10738469801723bb5bebbf54de86121eb48fca2dcd463805bbf7f54b3130"
},
"sequence" : 4294967295
}
],
"vout" : [ bla bla bla, lo mismo de antes ]
}