adds the given opcode to the end of the program . concode_field_sep List<ScriptChunk> chunks concode_field_sep Script updateScriptWithSignature concode_elem_sep Script createOpReturnScript concode_elem_sep ScriptBuilder data concode_elem_sep ScriptBuilder data concode_elem_sep Script createMultiSigInputScriptBytes concode_elem_sep Script createMultiSigInputScriptBytes concode_elem_sep ScriptBuilder smallNum concode_elem_sep ScriptBuilder smallNum concode_elem_sep Script createRedeemScript concode_elem_sep ScriptBuilder addChunk concode_elem_sep ScriptBuilder addChunk concode_elem_sep Script createInputScript concode_elem_sep Script createInputScript concode_elem_sep Script createOutputScript concode_elem_sep Script createOutputScript concode_elem_sep Script createMultiSigInputScript concode_elem_sep Script createMultiSigInputScript concode_elem_sep Script createMultiSigOutputScript concode_elem_sep Script build concode_elem_sep Script createP2SHMultiSigInputScript concode_elem_sep Script createP2SHOutputScript concode_elem_sep Script createP2SHOutputScript concode_elem_sep Script createP2SHOutputScript