line |
stmt |
bran |
cond |
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pod |
time |
code |
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package Bitcoin::Crypto::Transaction::Input; |
2
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$Bitcoin::Crypto::Transaction::Input::VERSION = '2.000_01'; # TRIAL |
3
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$Bitcoin::Crypto::Transaction::Input::VERSION = '2.00001'; |
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29
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29
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398
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use v5.10; |
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29
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117
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5
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29
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29
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172
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use strict; |
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93
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29
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701
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6
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29
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29
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157
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use warnings; |
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94
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29
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788
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7
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8
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29
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29
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195
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use Moo; |
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74
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29
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220
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9
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29
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29
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11532
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use Mooish::AttributeBuilder -standard; |
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29
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118
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29
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225
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10
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29
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29
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3641
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use Type::Params -sigs; |
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82
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29
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265
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11
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12
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29
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29
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13705
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use Bitcoin::Crypto qw(btc_utxo btc_script); |
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29
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73
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29
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1360
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13
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29
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29
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211
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use Bitcoin::Crypto::Constants; |
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29
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95
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29
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798
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14
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29
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29
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178
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use Bitcoin::Crypto::Helpers qw(pack_varint unpack_varint); |
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29
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77
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29
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1575
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15
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29
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29
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1210
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use Bitcoin::Crypto::Util qw(to_format); |
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29
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89
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29
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1451
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16
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use Bitcoin::Crypto::Types |
17
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29
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29
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184
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qw(ByteStr Str IntMaxBits ArrayRef InstanceOf Object BitcoinScript Bool Defined ScalarRef PositiveOrZeroInt); |
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29
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97
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29
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260
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18
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29
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29
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139534
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use Bitcoin::Crypto::Exception; |
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29
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115
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29
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767
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19
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29
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29
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12701
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use Bitcoin::Crypto::Script::Common; |
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29
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116
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29
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32390
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20
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21
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has param 'utxo' => ( |
22
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coerce => (InstanceOf ['Bitcoin::Crypto::Transaction::UTXO']) |
23
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->plus_coercions(ArrayRef, q{ Bitcoin::Crypto::Transaction::UTXO->get(@$_) }) |
24
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); |
25
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26
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has param 'signature_script' => ( |
27
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writer => 1, |
28
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coerce => BitcoinScript, |
29
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default => '', |
30
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); |
31
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32
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has param 'sequence_no' => ( |
33
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isa => IntMaxBits [32], |
34
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writer => 1, |
35
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default => Bitcoin::Crypto::Constants::max_sequence_no, |
36
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); |
37
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38
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has option 'witness' => ( |
39
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coerce => ArrayRef [ByteStr], |
40
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writer => 1, |
41
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); |
42
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43
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with qw( |
44
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Bitcoin::Crypto::Role::ShallowClone |
45
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); |
46
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47
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sub _nested_script |
48
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{ |
49
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82
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82
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175
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my ($self) = @_; |
50
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51
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82
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321
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my $input_script = $self->signature_script->to_serialized; |
52
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82
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100
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270
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return undef unless length $input_script; |
53
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54
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81
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239
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my $push = substr $input_script, 0, 1, ''; |
55
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81
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100
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232
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return undef unless ord $push == length $input_script; |
56
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57
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72
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222
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my $real_script = btc_script->from_serialized($input_script); |
58
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72
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212
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return $real_script; |
59
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} |
60
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61
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# script code for segwit digests (see script_base) |
62
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sub _script_code |
63
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{ |
64
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46
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46
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108
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my ($self) = @_; |
65
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46
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130
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my $utxo = $self->utxo; |
66
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67
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46
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156
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my $locking_script = $utxo->output->locking_script; |
68
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46
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91
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my $program; |
69
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my %types = ( |
70
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P2WPKH => sub { |
71
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72
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# get script hash from P2WPKH (ignore the first two OPs - version and push) |
73
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15
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15
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70
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my $hash = substr $locking_script->to_serialized, 2; |
74
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15
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111
|
$program = Bitcoin::Crypto::Script::Common->new(PKH => $hash); |
75
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}, |
76
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P2WSH => sub { |
77
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78
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# TODO: this is not complete, as it does not take OP_CODESEPARATORs into account |
79
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# NOTE: Transaction::Digest sets witness to signing_subscript |
80
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31
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50
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31
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126
|
$program = btc_script->from_serialized(($self->witness // [''])->[-1]); |
81
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}, |
82
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46
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410
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); |
83
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84
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46
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946
|
my $type = $utxo->output->locking_script->type; |
85
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86
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46
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100
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472
|
if ($type eq 'P2SH') { |
87
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88
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# nested - nothing should get here without checking if nested script is native segwit |
89
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24
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94
|
my $nested = $self->_nested_script; |
90
|
24
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423
|
$type = $nested->type; |
91
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92
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24
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617
|
$locking_script = $nested; |
93
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} |
94
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95
|
46
|
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190
|
$types{$type}->(); |
96
|
46
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536
|
return $program; |
97
|
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} |
98
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99
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signature_for to_serialized => ( |
100
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method => Object, |
101
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positional => [ |
102
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], |
103
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); |
104
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105
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sub to_serialized |
106
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{ |
107
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my ($self) = @_; |
108
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109
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# input should be serialized as follows: |
110
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# - transaction hash, 32 bytes |
111
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# - transaction output index, 4 bytes |
112
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# - signature script length, 1-9 bytes |
113
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# - signature script |
114
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# - sequence number, 4 bytes |
115
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my $serialized = ''; |
116
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117
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$serialized .= $self->prevout; |
118
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119
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my $script = $self->signature_script->to_serialized; |
120
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$serialized .= pack_varint(length $script); |
121
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$serialized .= $script; |
122
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123
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$serialized .= pack 'V', $self->sequence_no; |
124
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125
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return $serialized; |
126
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} |
127
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128
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signature_for from_serialized => ( |
129
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method => Str, |
130
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head => [ByteStr], |
131
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named => [ |
132
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pos => ScalarRef [PositiveOrZeroInt], |
133
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{optional => 1}, |
134
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], |
135
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); |
136
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137
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sub from_serialized |
138
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{ |
139
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my ($class, $serialized, $args) = @_; |
140
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my $partial = $args->pos; |
141
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my $pos = $partial ? ${$args->pos} : 0; |
142
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143
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my $transaction_hash = scalar reverse substr $serialized, $pos, 32; |
144
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$pos += 32; |
145
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146
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my $transaction_output_index = unpack 'V', substr $serialized, $pos, 4; |
147
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$pos += 4; |
148
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149
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my ($script_size_len, $script_size) = unpack_varint(substr $serialized, $pos, 9); |
150
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$pos += $script_size_len; |
151
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152
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Bitcoin::Crypto::Exception::Transaction->raise( |
153
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'serialized input script data is corrupted' |
154
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) if $pos + $script_size > length $serialized; |
155
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156
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my $script = substr $serialized, $pos, $script_size; |
157
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$pos += $script_size; |
158
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159
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my $sequence = unpack 'V', substr $serialized, $pos, 4; |
160
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$pos += 4; |
161
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162
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Bitcoin::Crypto::Exception::Transaction->raise( |
163
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'serialized input data is corrupted' |
164
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) if !$partial && $pos != length $serialized; |
165
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166
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${$args->pos} = $pos |
167
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if $partial; |
168
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169
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return $class->new( |
170
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utxo => [$transaction_hash, $transaction_output_index], |
171
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signature_script => $script, |
172
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sequence_no => $sequence, |
173
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); |
174
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} |
175
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176
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signature_for is_segwit => ( |
177
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method => Object, |
178
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positional => [], |
179
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); |
180
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181
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sub is_segwit |
182
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{ |
183
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my ($self) = @_; |
184
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185
|
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# Determines whether this script is segwit (including nested variants). |
186
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# There's no need to verify P2SH hash matching, as it will be checked at a |
187
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# later stage. It's enough if the input promises the segwit format. |
188
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189
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my $output_script = $self->utxo->output->locking_script; |
190
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|
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return !!1 if $output_script->is_native_segwit; |
191
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return !!0 unless ($output_script->type // '') eq 'P2SH'; |
192
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193
|
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|
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my $nested = $self->_nested_script; |
194
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|
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return !!0 unless defined $nested; |
195
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|
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return !!1 if $nested->is_native_segwit; |
196
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197
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return !!0; |
198
|
|
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} |
199
|
|
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|
200
|
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|
|
signature_for prevout => ( |
201
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method => Object, |
202
|
|
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positional => [], |
203
|
|
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|
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); |
204
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205
|
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sub prevout |
206
|
|
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{ |
207
|
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my ($self) = @_; |
208
|
|
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|
|
my $utxo = $self->utxo; |
209
|
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210
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return scalar reverse($utxo->txid) . pack 'V', $utxo->output_index; |
211
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} |
212
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213
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signature_for script_base => ( |
214
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method => Object, |
215
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positional => [], |
216
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); |
217
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218
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sub script_base |
219
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{ |
220
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my ($self) = @_; |
221
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222
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if ($self->is_segwit) { |
223
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return $self->_script_code; |
224
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} |
225
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else { |
226
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return $self->utxo->output->locking_script; |
227
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} |
228
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} |
229
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230
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signature_for dump => ( |
231
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method => Object, |
232
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named => [ |
233
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], |
234
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); |
235
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236
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sub dump |
237
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{ |
238
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my ($self, $params) = @_; |
239
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240
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my $type = $self->utxo->output->locking_script->type // 'Custom'; |
241
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my $address = $self->utxo->output->locking_script->get_address; |
242
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$address = " from $address" if $address; |
243
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244
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my @result; |
245
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push @result, "$type Input$address"; |
246
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push @result, 'spending output #' . $self->utxo->output_index . ' from ' . to_format([hex => $self->utxo->txid]); |
247
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push @result, 'value: ' . $self->utxo->output->value; |
248
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push @result, sprintf 'sequence: 0x%X', $self->sequence_no; |
249
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push @result, 'locking script: ' . to_format [hex => $self->utxo->output->locking_script->to_serialized]; |
250
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251
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if (!$self->signature_script->is_empty) { |
252
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push @result, 'signature script: ' . to_format [hex => $self->signature_script->to_serialized]; |
253
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} |
254
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255
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if ($self->has_witness) { |
256
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push @result, 'witness: '; |
257
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foreach my $witness (@{$self->witness}) { |
258
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push @result, to_format [hex => $witness]; |
259
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} |
260
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} |
261
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262
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|
return join "\n", @result; |
263
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|
} |
264
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265
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1; |
266
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267
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__END__ |
268
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=head1 NAME |
269
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270
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|
Bitcoin::Crypto::Transaction::Input - Bitcoin transaction input instance |
271
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272
|
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|
=head1 SYNOPSIS |
273
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274
|
|
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|
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|
|
use Bitcoin::Crypto qw(btc_transaction); |
275
|
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276
|
|
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|
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|
|
my $tx = btc_transaction->new; |
277
|
|
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|
|
|
|
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278
|
|
|
|
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|
|
$tx->add_input( |
279
|
|
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|
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|
|
utxo => [$txid, $output_index], |
280
|
|
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|
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|
|
); |
281
|
|
|
|
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|
|
282
|
|
|
|
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|
|
print $tx->inputs->[0]->dump; |
283
|
|
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|
|
284
|
|
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|
|
285
|
|
|
|
|
|
|
=head1 DESCRIPTION |
286
|
|
|
|
|
|
|
|
287
|
|
|
|
|
|
|
This is an input instance implementation used in transactions. It is rarely |
288
|
|
|
|
|
|
|
interacted with directly. |
289
|
|
|
|
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|
|
|
290
|
|
|
|
|
|
|
=head1 INTERFACE |
291
|
|
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|
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|
|
|
292
|
|
|
|
|
|
|
=head2 Attributes |
293
|
|
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|
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|
|
|
294
|
|
|
|
|
|
|
=head3 utxo |
295
|
|
|
|
|
|
|
|
296
|
|
|
|
|
|
|
An instance of L<Bitcoin::Crypto::Transaction::UTXO>. Required. |
297
|
|
|
|
|
|
|
|
298
|
|
|
|
|
|
|
Can also be passed an array reference of two parameters, which will be fed to |
299
|
|
|
|
|
|
|
L<Bitcoin::Crypto::Transaction::UTXO/get> to fetch the UTXO instance. |
300
|
|
|
|
|
|
|
|
301
|
|
|
|
|
|
|
I<Available in the constructor>. |
302
|
|
|
|
|
|
|
|
303
|
|
|
|
|
|
|
=head3 signature_script |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
The script used to unlock the coins from the UTXO. |
306
|
|
|
|
|
|
|
|
307
|
|
|
|
|
|
|
By default, it is an empty script. |
308
|
|
|
|
|
|
|
|
309
|
|
|
|
|
|
|
I<Available in the constructor>. |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
I<writer>: C<set_signature_script> |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
=head3 sequence_no |
314
|
|
|
|
|
|
|
|
315
|
|
|
|
|
|
|
Also known as C<nSequence> in Bitcoin Core. The sequence number used in various |
316
|
|
|
|
|
|
|
applications. Non-negative integer. |
317
|
|
|
|
|
|
|
|
318
|
|
|
|
|
|
|
By default, it is set to C<0xffffffff> (C<max_sequence_no> in C<Bitcoin::Crypto::Constants>). |
319
|
|
|
|
|
|
|
|
320
|
|
|
|
|
|
|
I<Available in the constructor>. |
321
|
|
|
|
|
|
|
|
322
|
|
|
|
|
|
|
I<writer>: C<set_sequence_no> |
323
|
|
|
|
|
|
|
|
324
|
|
|
|
|
|
|
=head3 witness |
325
|
|
|
|
|
|
|
|
326
|
|
|
|
|
|
|
SegWit data for this input. It is an array reference of bytestrings. Note that |
327
|
|
|
|
|
|
|
each element in the witness must be a separate element in this array |
328
|
|
|
|
|
|
|
(concatenating the witness into one bytestring will not work as intended). |
329
|
|
|
|
|
|
|
|
330
|
|
|
|
|
|
|
Empty by default. |
331
|
|
|
|
|
|
|
|
332
|
|
|
|
|
|
|
I<Available in the constructor>. |
333
|
|
|
|
|
|
|
|
334
|
|
|
|
|
|
|
I<writer>: C<set_witness> |
335
|
|
|
|
|
|
|
|
336
|
|
|
|
|
|
|
I<predicate>: C<has_witness> |
337
|
|
|
|
|
|
|
|
338
|
|
|
|
|
|
|
=head2 Methods |
339
|
|
|
|
|
|
|
|
340
|
|
|
|
|
|
|
=head3 new |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
$block = $class->new(%args) |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
This is a standard Moo constructor, which can be used to create the object. It |
345
|
|
|
|
|
|
|
takes arguments specified in L</Attributes>. |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
Returns class instance. |
348
|
|
|
|
|
|
|
|
349
|
|
|
|
|
|
|
=head3 to_serialized |
350
|
|
|
|
|
|
|
|
351
|
|
|
|
|
|
|
$bytestring = $object->to_serialized() |
352
|
|
|
|
|
|
|
|
353
|
|
|
|
|
|
|
Returns the serialized input data to be included into a serialized transaction. |
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
NOTE: serialized input does not include witness data, which is a part of this class. |
356
|
|
|
|
|
|
|
|
357
|
|
|
|
|
|
|
=head3 from_serialized |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
$object = $class->from_serialized($bytestring, %params) |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
Creates an object instance from serialized data. |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
C<%params> can be any of: |
364
|
|
|
|
|
|
|
|
365
|
|
|
|
|
|
|
=over |
366
|
|
|
|
|
|
|
|
367
|
|
|
|
|
|
|
=item * C<pos> |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
Position for partial string decoding. Optional. If passed, must be a scalar |
370
|
|
|
|
|
|
|
reference to an integer value. |
371
|
|
|
|
|
|
|
|
372
|
|
|
|
|
|
|
This integer will mark the starting position of C<$bytestring> from which to |
373
|
|
|
|
|
|
|
start decoding. It will be set to the next byte after end of input stream. |
374
|
|
|
|
|
|
|
|
375
|
|
|
|
|
|
|
=back |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
=head3 is_segwit |
378
|
|
|
|
|
|
|
|
379
|
|
|
|
|
|
|
$boolean = $object->is_segwit() |
380
|
|
|
|
|
|
|
|
381
|
|
|
|
|
|
|
Returns true if this input represents a segwit output. |
382
|
|
|
|
|
|
|
|
383
|
|
|
|
|
|
|
For scripts which have C<signature_script> filled out, this method is able to |
384
|
|
|
|
|
|
|
detect both native and compatibility segwit outputs (unlike |
385
|
|
|
|
|
|
|
L<Bitcoin::Crypto::Script/is_native_segwit>). |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
=head3 prevout |
388
|
|
|
|
|
|
|
|
389
|
|
|
|
|
|
|
$bytestring = $object->prevout() |
390
|
|
|
|
|
|
|
|
391
|
|
|
|
|
|
|
Returns a bytestring with prevout data ready to be encoded in places like |
392
|
|
|
|
|
|
|
digest preimages. Mostly used internally. |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
=head3 script_base |
395
|
|
|
|
|
|
|
|
396
|
|
|
|
|
|
|
$script = $object->script_base() |
397
|
|
|
|
|
|
|
|
398
|
|
|
|
|
|
|
Returns a base script for the digest. Mostly used internally. |
399
|
|
|
|
|
|
|
|
400
|
|
|
|
|
|
|
=head3 dump |
401
|
|
|
|
|
|
|
|
402
|
|
|
|
|
|
|
$text = $object->dump() |
403
|
|
|
|
|
|
|
|
404
|
|
|
|
|
|
|
Returns a readable description of the input. |
405
|
|
|
|
|
|
|
|
406
|
|
|
|
|
|
|
=head1 EXCEPTIONS |
407
|
|
|
|
|
|
|
|
408
|
|
|
|
|
|
|
This module throws an instance of L<Bitcoin::Crypto::Exception> if it |
409
|
|
|
|
|
|
|
encounters an error. It can produce the following error types from the |
410
|
|
|
|
|
|
|
L<Bitcoin::Crypto::Exception> namespace: |
411
|
|
|
|
|
|
|
|
412
|
|
|
|
|
|
|
=over |
413
|
|
|
|
|
|
|
|
414
|
|
|
|
|
|
|
=item * Bitcoin::Crypto::Exception::Transaction - general error with transaction |
415
|
|
|
|
|
|
|
|
416
|
|
|
|
|
|
|
=back |
417
|
|
|
|
|
|
|
|
418
|
|
|
|
|
|
|
=head1 SEE ALSO |
419
|
|
|
|
|
|
|
|
420
|
|
|
|
|
|
|
=over |
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
=item L<Bitcoin::Crypto::Transaction> |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
=item L<Bitcoin::Crypto::Transaction::UTXO> |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
=back |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
=cut |
429
|
|
|
|
|
|
|
|