lib/script/opcodes/flow_control/if.ex
defmodule BitcoinLib.Script.Opcodes.FlowControl.If do
@moduledoc """
Based on https://en.bitcoin.it/wiki/Script
Word OP_IF
Opcode 99
Hex 0x63
<expression> if [statements] [else [statements]]* endif
If the top stack value is not False, the statements are executed. The top stack value is removed.
"""
@behaviour BitcoinLib.Script.Opcode
defstruct []
@value 0x63
@doc """
Returns 0x63
## Examples
iex> BitcoinLib.Script.Opcodes.FlowControl.If.v()
0x63
"""
@spec v() :: 0x63
def v do
@value
end
@doc """
Returns <<0x63>>
## Examples
iex> BitcoinLib.Script.Opcodes.FlowControl.If.encode()
<<0x63>>
"""
@spec encode() :: <<_::8>>
def encode() do
<<@value::8>>
end
@doc """
If the top stack value is not False, the statements are executed. The top stack value is removed.
"""
def execute(_opcode, [_first_element | _remaining]) do
{:error, "OP_IF execution has not been implemented yet"}
end
end