The market is bleak, and I don't want to discuss it, even though today on 2025.6.10 Bitcoin and Ethereum surged so much, altcoins still can't rise, we can only wait until the second half of the year, in December. Today, I want to share some basic information about blockchain and related topics, some introductory information and professional terminology. I am still your cat brother, it's not easy to grind, remember to like and follow, thank you!

1 What is Bitcoin script, and what does it do?

Bitcoin script is often seen as the backdrop of Bitcoin's dazzling world, but it is actually a key component that ensures the security and efficiency of Bitcoin transactions. Bitcoin script is the language used by Bitcoin to execute all functions, from sending funds from wallets to allowing the creation of multi-user accounts.

2 How does Bitcoin script work in transactions? Bitcoin transactions are constructed using two small scripts?

scriptPubKey (locking script)

Set conditions under which the currency can be used. Usually contains the hash of the recipient's public key.

scriptSig (unlocking script)

Proving that the sender has the right to use the tokens. It includes signatures and public keys.

The Bitcoin network runs two scripts simultaneously to validate transactions. If scriptSig meets the rules of scriptPubKey, the transaction is approved.

3 Why is Bitcoin script so important?

Bitcoin script is very important because it allows Bitcoin to operate without trusting any centralized institution. It enables users to write rules such as:

1. Multi-signature transactions (require approval from multiple parties)

2. Time locks (you can only use the funds after a certain date)

3. Escrow-like transaction setups

It is also lightweight and fast – helping to keep Bitcoin secure and efficient.

4 What are the advantages of Bitcoin script?

1. Security-first design: reduces errors and attack risks by limiting functionality.

2. Deterministic behavior: everyone sees and runs the same code, with no surprises.

3. Efficient: fast verification speed, easy to implement.

4. Simple and clear: easier to audit and understand than complex smart contracts.

5 What are the limitations of Bitcoin script?

1. Non-Turing complete: cannot run complex programs or loops.

2. Limited flexibility

More advanced use cases require additional layers, such as the Lightning Network or sidechains.

3. Only 256 opcodes

This is sufficient for basic functionality, but not enough.