> For the complete documentation index, see [llms.txt](https://docs.blockdagnetwork.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blockdagnetwork.io/get-started/introductory-concepts/evm/opcodes.md).

# Opcodes

This document serves as an updated reference for BlockDAG opcodes, inspired by established opcode references. It provides an accessible yet comprehensive guide to the execution instructions utilized within the BlockDAG ecosystem. These opcodes define how transactions, contract execution, and state changes occur on the network.

### Understanding BlockDAG Opcodes <a href="#whats-a-transaction" id="whats-a-transaction"></a>

In BlockDAG, opcodes are low-level instructions that the virtual machine executes to process transactions and smart contract operations. Each opcode performs a specific function, such as mathematical computations, data storage, or smart contract execution.

### Key Features of BlockDAG Opcodes <a href="#whats-a-transaction" id="whats-a-transaction"></a>

* **Transaction Execution:** Opcodes define how transactions are processed and state changes are applied.
* **Smart Contract Operations:** Contract interactions rely on opcode execution to enable decentralized applications.
* **Gas Consumption:** Each opcode has an associated gas cost, ensuring efficient computation and network security.
* **Storage & Memory Management:** Opcodes handle data storage, retrieval, and manipulation within smart contracts.

### Categories of BlockDAG Opcodes <a href="#whats-a-transaction" id="whats-a-transaction"></a>

* **Arithmetic Operations:** Addition, subtraction, multiplication, and division of integers.
* **Logical Operations:** Boolean operations like AND, OR, XOR, and bitwise shifting.
* **Memory & Storage:** Reading and writing data from memory or contract storage.
* **Execution Control:** Jumps, conditionals, and function calls within contracts.
* **Blockchain Interaction:** Fetching block data, account balances, and interacting with contracts.

### Importance of Opcodes Execution in BlockDAG <a href="#whats-a-transaction" id="whats-a-transaction"></a>

BlockDAG’s opcode architecture ensures efficient transaction processing and smart contract execution. Each opcode is optimized to support high-performance decentralized applications while maintaining security and decentralization.


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