Function opcodeSize

txscript/opcode.go:1383–1391

opcodeSize pushes the size of the top item of the data stack onto the data stack. Stack transformation: [... x1] -> [... x1 len(x1)]

(op *opcode, data []byte, vm *Engine)

//
// Stack transformation: [... x1] -> [... x1 len(x1)]
func opcodeSize(op *opcode, data []byte, vm *Engine) error {
	so, err := vm.dstack.PeekByteArray(0)
	if err != nil {
		return err
	}

	vm.dstack.PushInt(scriptNum(len(so)))
	return nil
}

// opcodeEqual removes the top 2 items of the data stack, compares them as raw
// bytes, and pushes the result, encoded as a boolean, back to the stack.