Understanding of script numbers and cscriptnum in bitcoin

As a fundamental aspect of Bitcoin scripting language, script numbers play a crucial role in the execution of complex transactions. In this article, we will deepen the concept of script numbers, focusing in particular on “Cscriptnum, an essential component used by arithmetic operational codes.

What is a script number?

In Bitcoin scripting language, the script numbers are unique identifiers assigned to each operating code (arithmetic operation). These numbers allow scripts to perform specific operations within transactions. A script number is a 64 -bit full number that varies from 1 to 1677215. The interval and distribution of script numbers contribute to the complexity and safety of the Bitcoin scripting system.

What is Cscriptnum?

Cscriptnum, abbreviation of context script number, is a specific type of number of scripts used in the arithmetic operational codes. It is an integer that represents the context within which an operation is performed. The value ofcscriptnumdetermines how an operating code should be performed.

Example Pseudocode/Python illustrative

We consider a simple example to illustrate how it workscscripcriptnum ‘:

`Python

Arithmetic operations are represented as Python functions

Def Add (A, B):

return to + b

Arithmetic opcodes are generated by the Bitcoin scripting engine

Opcode = [

{“Type”: “op_add”, “args”: [1, 2], “scriptnum”: cscriptnum (100)}

number of scripts context (100)

“

Perform the optional code with the topics provided and the context script number

Result = add (3, 4)

assuming an op_add type op

Print (“Result:”, result)

Output: 7

`

In this example:

• The functionAddis represents an arithmetic operation.

• The Operation Op_add is generated by the Bitcoin scripting engine with a specific context script (100).

• When performing the OP Op_Add 'code, the script number determines how to calculate the result. In this case, it is used to add two numbers together.

What should be coded in Cscriptnum?

The coding ofcscriptnum� depends on various factors, including:

• Type : arithmetic operational codes are classified in different types (e.g. op_add, op_sub, etc.). These types determine the interval of script numbers.

2

• Context : The context within which an operation is performed can affect the script number.

In the Bitcoin scripting engine, the cscriptnum 'values ​​are generally codified as integers at 64 bit with a specific format:

[Bass 32 bits] [32 bits high]

Where:

• [Bass 32 bit]: the lower 32 bits represent the type of OPDODE code and the flags.

• [32 -bit highs]: the 32 higher bits contain further information, such as the topics.

This coding scheme provides a compact way to archive and transmit script numbers in Bitcoin scripting language.

Conclusion

In conclusion,Cscriptnum plays a vital role in the execution of complex transactions within the Bitcoin network. By understanding how the script numbers are coded and used by the arithmetic operating codes, developers can better grasp the complexity of scripting language and optimize their code for performance and safety.

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