Bitcoin: If no push opcode, how does item still end up on stack (tx verification)

February 7, 2025 By CRYPTOCURRENCY No Comments

The Push opcode: Understanding the mechanics of Bitcoin transactions

In Bitcoin, transactions are processed in the network and verified by nodes using complex algorithms. One of these algorithms is the Push Op code, which plays a crucial role in the transaction test process. In this article we will divided the functioning of the push op code and why it is important that element ends up on the stack (TX check).

What is the Push opcode?

The Push opcode is a protocol used by Bitcoin node to check transactions. It is an optimization technique that reduces the computing effort of the transaction test. In simple words, the push opcode enables nodes to press data directly onto the stack without having to read it from the hard drive or the memory.

How does the Push opcode work?

When a new transaction is created, the sender (Alice) sends it to the network together with its public key and signature. The recipient (BOB) receives the transaction, checks his authenticity and includes it into her own transaction. To check this transaction, Bobs reads knots of hard drives or memory all the necessary data, including Alices Pubkey script, Pubkey -Hash, Signature and more.

The Push opcode is used during this process. Here is a step-by-step coating:

  • Press the pubkey script : The sender pushes Alices Pubkey script onto the stack.

  • The Pubkey -Hash : In response, Bob pushes his own Pubkey -Hash on the stack.

  • Pushing Signature data

    : Bob also presses signature data from his private key to stack.

Why does that happen?

In order to efficiently check a transaction, the nodes must process all the necessary data in the memory or hard disk memory. By pressing these components directly onto the stack, nodes can avoid charging in memory or disc every time they are needed.

In particular, push opcodes are useful to check transactions that contain several public keys, signatures and other data elements. This reduces the overhead of the transaction check and makes it faster and more efficient.

Example: Alice’s transaction

Let’s assume that Alice wants to send 10 bitcoins to Bob. Your transaction would look like this:

`Bitcoin

0x00 01 02 04 05 07 08 09 10 11 12

| (Unsigned integer) | (Pubkey -script) |

When Alice sends this transaction, your knot use the Push Op code to press the following data onto the stack:

  • Alice’s Pubkey Hash (0x1234567890abcdef)

  • Bobs pubkey hash (0x234567890abcddef)

Bob’s knot reads these values ​​from the hard drive or the memory and checks them as part of its transaction test process.

Diploma

In summary, the Push opcode is a clever optimization technology that reduces the computing effort in Bitcoin transactions. By pushing public keys, signatures and other data elements directly on the stack, knots can check the transactions efficiently and effectively. This optimization enables faster and more efficient network operations, which makes it an essential part of the Bitcoin protocol.

I hope this article helped you to understand how the push opcode works and why it is crucial that element ends up on the stack (TX check).

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