Class: Tapyrus::Script
- Inherits:
-
Object
- Object
- Tapyrus::Script
- Includes:
- HexConverter, Opcodes
- Defined in:
- lib/tapyrus/script/script.rb
Overview
tapyrus script
Constant Summary
Constants included from Opcodes
Opcodes::DUPLICATE_KEY, Opcodes::NAME_MAP, Opcodes::OPCODES_MAP, Opcodes::OP_0, Opcodes::OP_0NOTEQUAL, Opcodes::OP_1, Opcodes::OP_10, Opcodes::OP_11, Opcodes::OP_12, Opcodes::OP_13, Opcodes::OP_14, Opcodes::OP_15, Opcodes::OP_16, Opcodes::OP_1ADD, Opcodes::OP_1NEGATE, Opcodes::OP_1SUB, Opcodes::OP_2, Opcodes::OP_2DIV, Opcodes::OP_2DROP, Opcodes::OP_2DUP, Opcodes::OP_2MUL, Opcodes::OP_2OVER, Opcodes::OP_2ROT, Opcodes::OP_2SWAP, Opcodes::OP_3, Opcodes::OP_3DUP, Opcodes::OP_4, Opcodes::OP_5, Opcodes::OP_6, Opcodes::OP_7, Opcodes::OP_8, Opcodes::OP_9, Opcodes::OP_ABS, Opcodes::OP_ADD, Opcodes::OP_AND, Opcodes::OP_BOOLAND, Opcodes::OP_BOOLOR, Opcodes::OP_CAT, Opcodes::OP_CHECKDATASIG, Opcodes::OP_CHECKDATASIGVERIFY, Opcodes::OP_CHECKMULTISIG, Opcodes::OP_CHECKMULTISIGVERIFY, Opcodes::OP_CHECKSIG, Opcodes::OP_CHECKSIGVERIFY, Opcodes::OP_CODESEPARATOR, Opcodes::OP_COLOR, Opcodes::OP_DEPTH, Opcodes::OP_DIV, Opcodes::OP_DROP, Opcodes::OP_DUP, Opcodes::OP_ELSE, Opcodes::OP_ENDIF, Opcodes::OP_EQUAL, Opcodes::OP_EQUALVERIFY, Opcodes::OP_FROMALTSTACK, Opcodes::OP_GREATERTHAN, Opcodes::OP_GREATERTHANOREQUAL, Opcodes::OP_HASH160, Opcodes::OP_HASH256, Opcodes::OP_IF, Opcodes::OP_IFDUP, Opcodes::OP_INVALIDOPCODE, Opcodes::OP_INVERT, Opcodes::OP_LEFT, Opcodes::OP_LESSTHAN, Opcodes::OP_LESSTHANOREQUAL, Opcodes::OP_LSHIFT, Opcodes::OP_MAX, Opcodes::OP_MIN, Opcodes::OP_MOD, Opcodes::OP_MUL, Opcodes::OP_NEGATE, Opcodes::OP_NIP, Opcodes::OP_NOP, Opcodes::OP_NOP1, Opcodes::OP_NOP10, Opcodes::OP_NOP2, Opcodes::OP_NOP3, Opcodes::OP_NOP4, Opcodes::OP_NOP5, Opcodes::OP_NOP6, Opcodes::OP_NOP7, Opcodes::OP_NOP8, Opcodes::OP_NOP9, Opcodes::OP_NOT, Opcodes::OP_NOTIF, Opcodes::OP_NUMEQUAL, Opcodes::OP_NUMEQUALVERIFY, Opcodes::OP_NUMNOTEQUAL, Opcodes::OP_OR, Opcodes::OP_OVER, Opcodes::OP_PICK, Opcodes::OP_PUBKEY, Opcodes::OP_PUBKEYHASH, Opcodes::OP_PUSHDATA1, Opcodes::OP_PUSHDATA2, Opcodes::OP_PUSHDATA4, Opcodes::OP_RESERVED, Opcodes::OP_RESERVED1, Opcodes::OP_RESERVED2, Opcodes::OP_RETURN, Opcodes::OP_RIGHT, Opcodes::OP_RIPEMD160, Opcodes::OP_ROLL, Opcodes::OP_ROT, Opcodes::OP_RSHIFT, Opcodes::OP_SHA1, Opcodes::OP_SHA256, Opcodes::OP_SIZE, Opcodes::OP_SUB, Opcodes::OP_SUBSTR, Opcodes::OP_SWAP, Opcodes::OP_TOALTSTACK, Opcodes::OP_TUCK, Opcodes::OP_VER, Opcodes::OP_VERIF, Opcodes::OP_VERIFY, Opcodes::OP_VERNOTIF, Opcodes::OP_WITHIN, Opcodes::OP_XOR
Instance Attribute Summary collapse
-
#chunks ⇒ Object
Returns the value of attribute chunks.
Class Method Summary collapse
-
.decode_number(s) ⇒ Object
decode script number hex to int value.
-
.encode_number(i) ⇒ Object
encode int value to script number hex.
-
.from_string(string) ⇒ Object
generate script from string.
-
.pack_pushdata(data) ⇒ Object
binary
data
convert pushdata which contains data length and append PUSHDATA opcode if necessary. -
.parse_from_addr(addr) ⇒ Tapyrus::Script
generate script from addr.
- .parse_from_payload(payload) ⇒ Object
-
.to_cp2pkh(color_id, pubkey_hash) ⇒ Script
generate cp2pkh script.
-
.to_cp2sh(color_id, script_hash) ⇒ Script
generate cp2sh script.
-
.to_multisig_script(m, pubkeys, sort: false) ⇒ Script
generate m of n multisig script.
-
.to_p2pkh(pubkey_hash) ⇒ Object
generate P2PKH script.
-
.to_p2sh(script_hash) ⇒ Script
generate p2sh script.
-
.to_p2sh_multisig_script(m, pubkeys) ⇒ Script
generate m of n multisig p2sh script.
Instance Method Summary collapse
-
#<<(obj) ⇒ Object
append object to payload.
- #==(other) ⇒ Object
-
#add_color(color_id) ⇒ Script
Add color identifier to existing p2pkh or p2sh.
-
#addresses ⇒ Object
deprecated
Deprecated.
use #to_addr method.
-
#append_data(data) ⇒ Script
append data to payload with pushdata opcode.
-
#append_opcode(opcode) ⇒ Script
append opcode to payload.
-
#color_id ⇒ ColorIdentifer
Return color identifier for this script.
-
#colored? ⇒ Boolean
Return whether this script represents colored coin.
-
#cp2pkh? ⇒ Boolean
Return whether this script is a CP2PKH format script or not.
-
#cp2sh? ⇒ Boolean
Return whether this script is a CP2SH format script or not.
-
#delete_opcode(opcode) ⇒ Object
remove all occurences of opcode.
- #empty? ⇒ Boolean
-
#find_and_delete(subscript) ⇒ Object
removes chunks matching subscript byte-for-byte and returns as a new object.
- #get_multisig_pubkeys ⇒ Object
-
#get_pubkeys ⇒ Object
get public keys in the stack.
-
#include?(item) ⇒ Boolean
Check the item is in the chunk of the script.
-
#initialize ⇒ Script
constructor
A new instance of Script.
- #multisig? ⇒ Boolean
- #op_return? ⇒ Boolean
- #op_return_data ⇒ Object
-
#p2pkh? ⇒ Boolean
whether this script is a P2PKH format script.
- #p2sh? ⇒ Boolean
-
#push_int(n) ⇒ Object
push integer to stack.
-
#push_only? ⇒ Boolean
whether data push only script which dose not include other opcode.
-
#remove_color ⇒ Script
Remove color identifier from cp2pkh or cp2sh.
-
#run ⇒ Object
execute script interpreter using this script for development.
-
#size ⇒ Object
script size.
-
#standard? ⇒ Boolean
check whether standard script.
- #standard_op_return? ⇒ Boolean
-
#subscript(*args) ⇒ Object
subscript this script to the specified range.
-
#subscript_codeseparator(separator_index) ⇒ Object
Returns a script that deleted the script before the index specified by separator_index.
-
#to_addr ⇒ String
Returns the address corresponding to this script.
- #to_h ⇒ Object
-
#to_hash160 ⇒ Object
generate hash160 hash for payload.
-
#to_p2sh ⇒ Script
generate p2sh script with this as a redeem script.
- #to_payload ⇒ Object
- #to_s ⇒ Object
-
#to_script_code(skip_separator_index = 0) ⇒ Object
returns the self payload.
-
#to_sha256 ⇒ Object
generate sha-256 hash for payload.
- #type ⇒ Object
-
#unspendable? ⇒ Boolean
Returns whether the script is guaranteed to fail at execution, regardless of the initial stack.
Methods included from Opcodes
defined?, name_to_opcode, opcode_to_name, opcode_to_small_int, small_int_to_opcode
Methods included from HexConverter
Constructor Details
#initialize ⇒ Script
Returns a new instance of Script.
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# File 'lib/tapyrus/script/script.rb', line 12 def initialize @chunks = [] end |
Instance Attribute Details
#chunks ⇒ Object
Returns the value of attribute chunks.
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# File 'lib/tapyrus/script/script.rb', line 10 def chunks @chunks end |
Class Method Details
.decode_number(s) ⇒ Object
decode script number hex to int value
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# File 'lib/tapyrus/script/script.rb', line 426 def self.decode_number(s) v = s.htb.reverse return 0 if v.length.zero? mbs = v[0].unpack("C").first v[0] = [mbs - 0x80].pack("C") unless (mbs & 0x80) == 0 result = v.bth.to_i(16) result = -result unless (mbs & 0x80) == 0 result end |
.encode_number(i) ⇒ Object
encode int value to script number hex. The stacks hold byte vectors. When used as numbers, byte vectors are interpreted as little-endian variable-length integers with the most significant bit determining the sign of the integer. Thus 0x81 represents -1. 0x80 is another representation of zero (so called negative 0). Positive 0 is represented by a null-length vector. Byte vectors are interpreted as Booleans where False is represented by any representation of zero, and True is represented by any representation of non-zero.
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# File 'lib/tapyrus/script/script.rb', line 412 def self.encode_number(i) return "" if i == 0 negative = i < 0 hex = i.abs.to_even_length_hex hex = "0" + hex unless (hex.length % 2).zero? v = hex.htb.reverse # change endian v = v << (negative ? 0x80 : 0x00) unless (v[-1].unpack("C").first & 0x80) == 0 v[-1] = [v[-1].unpack("C").first | 0x80].pack("C") if negative v.bth end |
.from_string(string) ⇒ Object
generate script from string.
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# File 'lib/tapyrus/script/script.rb', line 101 def self.from_string(string) script = new string .split(" ") .each do |v| opcode = Opcodes.name_to_opcode(v) if opcode script << (v =~ /^\d/ && Opcodes.small_int_to_opcode(v.ord) ? v.ord : opcode) else script << (v =~ /^[0-9]+$/ ? v.to_i : v) end end script end |
.pack_pushdata(data) ⇒ Object
binary data
convert pushdata which contains data length and append PUSHDATA opcode if necessary.
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# File 'lib/tapyrus/script/script.rb', line 437 def self.pack_pushdata(data) size = data.bytesize header = if size < OP_PUSHDATA1 [size].pack("C") elsif size < 0xff [OP_PUSHDATA1, size].pack("CC") elsif size < 0xffff [OP_PUSHDATA2, size].pack("Cv") elsif size < 0xffffffff [OP_PUSHDATA4, size].pack("CV") else raise ArgumentError, "data size is too big." end header + data end |
.parse_from_addr(addr) ⇒ Tapyrus::Script
generate script from addr.
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# File 'lib/tapyrus/script/script.rb', line 119 def self.parse_from_addr(addr) hex, addr_version = Tapyrus.decode_base58_address(addr) case addr_version when Tapyrus.chain_params.address_version Tapyrus::Script.to_p2pkh(hex) when Tapyrus.chain_params.p2sh_version Tapyrus::Script.to_p2sh(hex) when Tapyrus.chain_params.cp2pkh_version color = Tapyrus::Color::ColorIdentifier.parse_from_payload(hex[0..65].htb) Tapyrus::Script.to_cp2pkh(color, hex[66..-1]) when Tapyrus.chain_params.cp2sh_version color = Tapyrus::Color::ColorIdentifier.parse_from_payload(hex[0..65].htb) Tapyrus::Script.to_cp2sh(color, hex[66..-1]) end end |
.parse_from_payload(payload) ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 135 def self.parse_from_payload(payload) s = new buf = StringIO.new(payload) until buf.eof? opcode = buf.read(1) if opcode.pushdata? pushcode = opcode.ord packed_size = nil len = case pushcode when OP_PUSHDATA1 packed_size = buf.read(1) packed_size.unpack("C").first when OP_PUSHDATA2 packed_size = buf.read(2) packed_size.unpack("v").first when OP_PUSHDATA4 packed_size = buf.read(4) packed_size.unpack("V").first else pushcode if pushcode < OP_PUSHDATA1 end if len s.chunks << [len].pack("C") if buf.eof? unless buf.eof? chunk = (packed_size ? (opcode + packed_size) : (opcode)) + buf.read(len) s.chunks << chunk end end else if Opcodes.defined?(opcode.ord) s << opcode.ord else s.chunks << (opcode + buf.read) # If opcode is invalid, put all remaining data in last chunk. end end end s end |
.to_cp2pkh(color_id, pubkey_hash) ⇒ Script
generate cp2pkh script
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# File 'lib/tapyrus/script/script.rb', line 48 def self.to_cp2pkh(color_id, pubkey_hash) raise ArgumentError, "Specified color identifier is invalid" unless color_id&.valid? new << color_id.to_payload << OP_COLOR << OP_DUP << OP_HASH160 << pubkey_hash << OP_EQUALVERIFY << OP_CHECKSIG end |
.to_cp2sh(color_id, script_hash) ⇒ Script
generate cp2sh script
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# File 'lib/tapyrus/script/script.rb', line 58 def self.to_cp2sh(color_id, script_hash) raise ArgumentError, "Specified color identifier is invalid" unless color_id&.valid? new << color_id.to_payload << OP_COLOR << OP_HASH160 << script_hash << OP_EQUAL end |
.to_multisig_script(m, pubkeys, sort: false) ⇒ Script
generate m of n multisig script
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# File 'lib/tapyrus/script/script.rb', line 95 def self.to_multisig_script(m, pubkeys, sort: false) pubkeys = pubkeys.sort if sort new << m << pubkeys << pubkeys.size << OP_CHECKMULTISIG end |
.to_p2pkh(pubkey_hash) ⇒ Object
generate P2PKH script
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# File 'lib/tapyrus/script/script.rb', line 17 def self.to_p2pkh(pubkey_hash) new << OP_DUP << OP_HASH160 << pubkey_hash << OP_EQUALVERIFY << OP_CHECKSIG end |
.to_p2sh(script_hash) ⇒ Script
generate p2sh script.
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# File 'lib/tapyrus/script/script.rb', line 33 def self.to_p2sh(script_hash) Script.new << OP_HASH160 << script_hash << OP_EQUAL end |
.to_p2sh_multisig_script(m, pubkeys) ⇒ Script
generate m of n multisig p2sh script
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# File 'lib/tapyrus/script/script.rb', line 25 def self.to_p2sh_multisig_script(m, pubkeys) redeem_script = to_multisig_script(m, pubkeys) [redeem_script.to_p2sh, redeem_script] end |
Instance Method Details
#<<(obj) ⇒ Object
append object to payload
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# File 'lib/tapyrus/script/script.rb', line 302 def <<(obj) if obj.is_a?(Integer) push_int(obj) elsif obj.is_a?(String) append_data(obj) elsif obj.is_a?(Array) obj.each { |o| self.<< o } self end end |
#==(other) ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 516 def ==(other) return false unless other chunks == other.chunks end |
#add_color(color_id) ⇒ Script
Add color identifier to existing p2pkh or p2sh
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# File 'lib/tapyrus/script/script.rb', line 68 def add_color(color_id) raise ArgumentError, "Specified color identifier is invalid" unless color_id&.valid? raise RuntimeError, "Only p2pkh and p2sh can add color" unless p2pkh? or p2sh? Tapyrus::Script.new.tap do |s| s << color_id.to_payload << OP_COLOR s.chunks += self.chunks end end |
#addresses ⇒ Object
use #to_addr method.
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# File 'lib/tapyrus/script/script.rb', line 194 def addresses return [p2pkh_addr] if p2pkh? return [p2sh_addr] if p2sh? return [cp2pkh_addr] if cp2pkh? return [cp2sh_addr] if cp2sh? return get_multisig_pubkeys.map { |pubkey| Tapyrus::Key.new(pubkey: pubkey.bth).to_p2pkh } if multisig? [] end |
#append_data(data) ⇒ Script
append data to payload with pushdata opcode
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# File 'lib/tapyrus/script/script.rb', line 336 def append_data(data) data = Encoding::ASCII_8BIT == data.encoding ? data : data.htb chunks << Tapyrus::Script.pack_pushdata(data) self end |
#append_opcode(opcode) ⇒ Script
append opcode to payload
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# File 'lib/tapyrus/script/script.rb', line 326 def append_opcode(opcode) opcode = Opcodes.small_int_to_opcode(opcode) if -1 <= opcode && opcode <= 16 raise ArgumentError, "specified invalid opcode #{opcode}." unless Opcodes.defined?(opcode) chunks << opcode.chr self end |
#color_id ⇒ ColorIdentifer
Return color identifier for this script.
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# File 'lib/tapyrus/script/script.rb', line 265 def color_id return nil unless colored? Tapyrus::Color::ColorIdentifier.parse_from_payload(chunks[0].pushed_data) end |
#colored? ⇒ Boolean
Return whether this script represents colored coin.
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# File 'lib/tapyrus/script/script.rb', line 259 def colored? cp2pkh? || cp2sh? end |
#cp2pkh? ⇒ Boolean
Return whether this script is a CP2PKH format script or not.
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# File 'lib/tapyrus/script/script.rb', line 238 def cp2pkh? return false unless chunks.size == 7 return false unless chunks[0].bytesize == 34 return false unless Tapyrus::Color::ColorIdentifier.parse_from_payload(chunks[0].pushed_data)&.valid? return false unless chunks[1].ord == OP_COLOR [OP_DUP, OP_HASH160, OP_EQUALVERIFY, OP_CHECKSIG] == (chunks[2..3] + chunks[5..6]).map(&:ord) && chunks[4].bytesize == 21 end |
#cp2sh? ⇒ Boolean
Return whether this script is a CP2SH format script or not.
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# File 'lib/tapyrus/script/script.rb', line 249 def cp2sh? return false unless chunks.size == 5 return false unless chunks[0].bytesize == 34 return false unless Tapyrus::Color::ColorIdentifier.parse_from_payload(chunks[0].pushed_data)&.valid? return false unless chunks[1].ord == OP_COLOR OP_HASH160 == chunks[2].ord && OP_EQUAL == chunks[4].ord && chunks[3].bytesize == 21 end |
#delete_opcode(opcode) ⇒ Object
remove all occurences of opcode. Typically it’s OP_CODESEPARATOR.
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# File 'lib/tapyrus/script/script.rb', line 500 def delete_opcode(opcode) @chunks = chunks.select { |chunk| chunk.ord != opcode } self end |
#empty? ⇒ Boolean
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# File 'lib/tapyrus/script/script.rb', line 179 def empty? chunks.size == 0 end |
#find_and_delete(subscript) ⇒ Object
removes chunks matching subscript byte-for-byte and returns as a new object.
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# File 'lib/tapyrus/script/script.rb', line 462 def find_and_delete(subscript) raise ArgumentError, "subscript must be Tapyrus::Script" unless subscript.is_a?(Script) return self if subscript.chunks.empty? buf = [] i = 0 result = Script.new chunks.each do |chunk| sub_chunk = subscript.chunks[i] if chunk.start_with?(sub_chunk) if chunk == sub_chunk buf << chunk i += 1 ( i = 0 buf.clear ) if i == subscript.chunks.size # matched the whole subscript else # matched the part of head i = 0 tmp = chunk.dup tmp.slice!(sub_chunk) result.chunks << tmp end else result.chunks << buf.join unless buf.empty? if buf.first == chunk i = 1 buf = [chunk] else i = 0 result.chunks << chunk end end end result end |
#get_multisig_pubkeys ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 86 def get_multisig_pubkeys num = Tapyrus::Opcodes.opcode_to_small_int(chunks[-2].bth.to_i(16)) (1..num).map { |i| chunks[i].pushed_data } end |
#get_pubkeys ⇒ Object
get public keys in the stack. @return[Array] an array of the pubkeys with hex format.
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# File 'lib/tapyrus/script/script.rb', line 285 def get_pubkeys chunks .select do |c| c.pushdata? && [33, 65].include?(c.pushed_data.bytesize) && [2, 3, 4, 6, 7].include?(c.pushed_data[0].bth.to_i(16)) end .map { |c| c.pushed_data.bth } end |
#include?(item) ⇒ Boolean
Check the item is in the chunk of the script.
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# File 'lib/tapyrus/script/script.rb', line 343 def include?(item) chunk_item = if item.is_a?(Integer) item.chr elsif item.is_a?(String) data = Encoding::ASCII_8BIT == item.encoding ? item : item.htb Tapyrus::Script.pack_pushdata(data) end return false unless chunk_item chunks.include?(chunk_item) end |
#multisig? ⇒ Boolean
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# File 'lib/tapyrus/script/script.rb', line 220 def multisig? return false if chunks.size < 4 || chunks.last.ord != OP_CHECKMULTISIG pubkey_count = Opcodes.opcode_to_small_int(chunks[-2].opcode) sig_count = Opcodes.opcode_to_small_int(chunks[0].opcode) return false unless pubkey_count || sig_count sig_count <= pubkey_count end |
#op_return? ⇒ Boolean
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# File 'lib/tapyrus/script/script.rb', line 228 def op_return? chunks.size >= 1 && chunks[0].ord == OP_RETURN end |
#op_return_data ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 271 def op_return_data return nil unless op_return? return nil if chunks.size == 1 chunks[1].pushed_data end |
#p2pkh? ⇒ Boolean
whether this script is a P2PKH format script.
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# File 'lib/tapyrus/script/script.rb', line 209 def p2pkh? return false unless chunks.size == 5 [OP_DUP, OP_HASH160, OP_EQUALVERIFY, OP_CHECKSIG] == (chunks[0..1] + chunks[3..4]).map(&:ord) && chunks[2].bytesize == 21 end |
#p2sh? ⇒ Boolean
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# File 'lib/tapyrus/script/script.rb', line 215 def p2sh? return false unless chunks.size == 3 OP_HASH160 == chunks[0].ord && OP_EQUAL == chunks[2].ord && chunks[1].bytesize == 21 end |
#push_int(n) ⇒ Object
push integer to stack.
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# File 'lib/tapyrus/script/script.rb', line 314 def push_int(n) begin append_opcode(n) rescue ArgumentError append_data(Script.encode_number(n)) end self end |
#push_only? ⇒ Boolean
whether data push only script which dose not include other opcode
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# File 'lib/tapyrus/script/script.rb', line 278 def push_only? chunks.each { |c| return false if !c.opcode.nil? && c.opcode > OP_16 } true end |
#remove_color ⇒ Script
Remove color identifier from cp2pkh or cp2sh
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# File 'lib/tapyrus/script/script.rb', line 80 def remove_color raise RuntimeError, "Only cp2pkh and cp2sh can remove color" unless cp2pkh? or cp2sh? Tapyrus::Script.new.tap { |s| s.chunks = self.chunks[2..-1] } end |
#run ⇒ Object
execute script interpreter using this script for development.
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# File 'lib/tapyrus/script/script.rb', line 400 def run Tapyrus::ScriptInterpreter.eval(Tapyrus::Script.new, self.dup) end |
#size ⇒ Object
script size
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# File 'lib/tapyrus/script/script.rb', line 395 def size to_payload.bytesize end |
#standard? ⇒ Boolean
check whether standard script.
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# File 'lib/tapyrus/script/script.rb', line 204 def standard? p2pkh? | p2sh? | multisig? | standard_op_return? end |
#standard_op_return? ⇒ Boolean
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# File 'lib/tapyrus/script/script.rb', line 232 def standard_op_return? op_return? && size <= MAX_OP_RETURN_RELAY && (chunks.size == 1 || chunks[1].opcode <= OP_16) end |
#subscript(*args) ⇒ Object
subscript this script to the specified range.
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# File 'lib/tapyrus/script/script.rb', line 455 def subscript(*args) s = self.class.new s.chunks = chunks[*args] s end |
#subscript_codeseparator(separator_index) ⇒ Object
Returns a script that deleted the script before the index specified by separator_index.
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# File 'lib/tapyrus/script/script.rb', line 506 def subscript_codeseparator(separator_index) buf = [] process_separator_index = 0 chunks.each do |chunk| buf << chunk if process_separator_index == separator_index process_separator_index += 1 if chunk.ord == OP_CODESEPARATOR && process_separator_index < separator_index end buf.join end |
#to_addr ⇒ String
Returns the address corresponding to this script. Return nil if there is no corresponding address.
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# File 'lib/tapyrus/script/script.rb', line 185 def to_addr return p2pkh_addr if p2pkh? return p2sh_addr if p2sh? return cp2pkh_addr if cp2pkh? return cp2sh_addr if cp2sh? nil end |
#to_h ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 528 def to_h h = { asm: to_s, hex: to_hex, type: type } addrs = addresses unless addrs.empty? h[:req_sigs] = multisig? ? Tapyrus::Opcodes.opcode_to_small_int(chunks[0].bth.to_i(16)) : addrs.size h[:addresses] = addrs end h end |
#to_hash160 ⇒ Object
generate hash160 hash for payload
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# File 'lib/tapyrus/script/script.rb', line 390 def to_hash160 Tapyrus.hash160(to_hex) end |
#to_p2sh ⇒ Script
generate p2sh script with this as a redeem script
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# File 'lib/tapyrus/script/script.rb', line 39 def to_p2sh Script.to_p2sh(to_hash160) end |
#to_payload ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 175 def to_payload chunks.join end |
#to_s ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 355 def to_s chunks .map do |c| case c when Integer opcode_to_name(c) when String return c if c.empty? if c.pushdata? v = Opcodes.opcode_to_small_int(c.ord) if v v else data = c.pushed_data if data.bytesize <= 4 Script.decode_number(data.bth) # for scriptnum else data.bth end end else opcode = Opcodes.opcode_to_name(c.ord) opcode ? opcode : "OP_UNKNOWN [error]" end end end .join(" ") end |
#to_script_code(skip_separator_index = 0) ⇒ Object
returns the self payload. ScriptInterpreter does not use this.
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# File 'lib/tapyrus/script/script.rb', line 295 def to_script_code(skip_separator_index = 0) payload = to_payload payload = subscript_codeseparator(skip_separator_index) if skip_separator_index > 0 Tapyrus.pack_var_string(payload) end |
#to_sha256 ⇒ Object
generate sha-256 hash for payload
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# File 'lib/tapyrus/script/script.rb', line 385 def to_sha256 Tapyrus.sha256(to_payload).bth end |
#type ⇒ Object
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# File 'lib/tapyrus/script/script.rb', line 521 def type return "pubkeyhash" if p2pkh? return "scripthash" if p2sh? return "multisig" if multisig? "nonstandard" end |
#unspendable? ⇒ Boolean
Returns whether the script is guaranteed to fail at execution, regardless of the initial stack. This allows outputs to be pruned instantly when entering the UTXO set.
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# File 'lib/tapyrus/script/script.rb', line 541 def unspendable? (size > 0 && op_return?) || size > Tapyrus::MAX_SCRIPT_SIZE end |