lib/script/opcodes/flow_control/end_if.ex
defmodule BitcoinLib.Script.Opcodes.FlowControl.EndIf do
@moduledoc """
Based on https://en.bitcoin.it/wiki/Script
Word OP_ENDIF
Opcode 104
Hex 0x68
<expression> if [statements] [else [statements]]* endif
Ends an if/else block. All blocks must end, or the transaction
is invalid. An OP_ENDIF without OP_IF earlier is also invalid.
"""
@behaviour BitcoinLib.Script.Opcode
defstruct []
@value 0x68
@doc """
Returns 0x68
## Examples
iex> BitcoinLib.Script.Opcodes.FlowControl.EndIf.v()
0x68
"""
@spec v() :: 0x68
def v do
@value
end
@doc """
Returns <<0x68>>
## Examples
iex> BitcoinLib.Script.Opcodes.FlowControl.EndIf.encode()
<<0x68>>
"""
@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_ENDIF execution has not been implemented yet"}
end
end