Ethereum: Redeem script. script hash, witness script and witness program

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Ethereum scripting 101: Understanding the redempted scripts, scripts of witnesses and witness programs

As a user of Ethereum blockchain, it is crucial to understand the basic script language used for transactions, contracts and other functionality of smart contracts. In this article we will enter the world of the Ethereum script, focusing on two key concepts: buy scripts, scripts of witnesses and witness programs.

** What are scripts?

Bitcoin is a script to perform complex logic using digital signatures. They are basically a standalone blocks of code that the network can execute. In Ethereum, scripts are used for different purposes, including:

Transaction check

Execution of a smart contract

Payment processing

Script for Redemption: Special Case

The ransom script is a specific type of script in Ethereum that allows you to check and confirm transactions. It's called "buy out" because it is designed to buy or "without" UNFReseze "funds held in a contract or other smart contract.

The ransom script consists of two main parts:

Pubkeyhash : This is a public key used to sign a transaction.

Bytes script : These are a binary screening of the script, which contains logic to check and confirm the transaction.

Syntax of the Redemption script is the following:

`Strength

OP_DUP OP_HASH160 OP_EQUALLEVIFY OP_CHECXIG ...



Here's a breakdown of each component:

Op_dup: This is a instruction that duplicates a signature from the previous step.

Op_hash160: This is determined by the public key used to sign a transaction.

: This is a public key that is Hashed and checked.

OP_EQUALVERIRIFY: This checks whether a signature at the top hash.

Op_checxig: This checks that the original signature has been generated by the contract owner.



 Witness script 

The script of the witness, also known as the "Witness Program", is a type of Ethereum script used to confirm and confirm. It is designed to check the transactions and contracts online without relying on other scripts.

Witness programs are usually implemented using a combination of script and witness programs. The header contains information about the Witness Program, including:

* Witness ID program : This is a unique identifier awarded to a witness program.

* Signature Script 
: This is a digital signature associated with a witness program.

Syntax for a witness script is the following:

Strength

0x ... // Witness Program Header

OP_DUP OP_HASH160 OP_EQUALLEVIFY ...

Witness_program_id



Here's a breakdown of each component:

0x ...: This is a hexadecimal display of the Witness Program.

Op_dup: This duplicates a signature from the previous step.

Op_hash160: This is determined by the public key used to sign a transaction.

: This is a public key that is Hashed and checked.

OP_EQUALVERIRIFY: This checks whether a signature at the top hash.

Witness_program_id: This contains information about the Witness Program, including his ID.



 Witness Programs Coorders 

The Witness Program Header contains information about the Witness Program, such as:

* Program Name : The name of a contract or a smart contract.

* version of the program 

: number of versions of a contract or a smart contract.

* gas limit : maximum gas amount allowed for a contract or a smart contract.

Syntax for Witness Program Headquarters is as follows: