Function opcode2Dup

txscript/opcode.go:1237–1239

opcode2Dup duplicates the top 2 items on the data stack. Stack transformation: [... x1 x2 x3] -> [... x1 x2 x3 x2 x3]

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

//
// Stack transformation: [... x1 x2 x3] -> [... x1 x2 x3 x2 x3]
func opcode2Dup(op *opcode, data []byte, vm *Engine) error {
	return vm.dstack.DupN(2)
}

// opcode3Dup duplicates the top 3 items on the data stack.
//