Ethereum: Base58-codde a string in Java
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Base58 Coding is a wide spread method for coding large data records in compact and printable signs. In this article we will examine .html).
Requirements
- Java 1.8 or higher
- A string that is supposed to be boy58 code
Code
`Java
Import java.nio.shamet.standardcharets;
Import java.util.base64;
Main Class Haupt {
Public Static Void Main (String [] Args) {
String test ring = "56379C7BCD6B418854E74169F84E8676CF8B8";
Byte [] Codedbytes = Cododebase58 (test ring);
System.out.println ("Coded bytes:" + Base64. Coder (). Codetostring (Codedbytes));
}
Public Static byte [] Codebase58 (String Input) {
// Create a New Base64ener Code Instance
Basic64.Doder encoder = base64.ge code ();
// Define the Basic -58 -Alphabet and Upholstery Program
String alphabet = "123456789abcdeefghjklmnpqrstuvwxyzabcdefghijkmnopqrstuvwxyz";
int padding length = 0;
// Loop Until the Input String is less than 1 byte
While (input.length ()> = 1) {
// Attach the next character to the coded string
Int i = 0;
While ((i
Ccoder.update (input, i);
I ++;
}
// Calculate the Upholstery Length If Necessary
Paddinglth = padding length + (input.longth () - i);
// Take the Upholstery Sign to the Coded String
String padding estr = "=". Rehearsal (padding length);
Codedbytes [i] = paddingchar.getbytes ();
input = input.substring (i);
}
Return Codedbytes;
}
}
Explanation
- The
codebase58Method Absorbs a string as input and returns an array from bytes.
- We create a new “base64.coder” instance with the parameter
java.nio.sandardharsets.utf_8, the standard coding used by base64 class from Java.
- We define the base 58 alphabet (“alphabet”) and the upholstery Scheme (“paddingtlegth”).
- We look until the input string is less than 1 byte lung. In Each Iteration we add the next character from the input string to the coded string with
cncoder.update (input, i).
- If Necessary, we calculate the upholstery length by subtracting the current index from the total length of the input string and attaching a repeated padding sign (=
) to the coded string.
- Finally, we return the selection of bytes.
Example Uses
You can use this method in a Java Program to encodes Characters for memory or transmission using the base58 coding.
Java
Example of Public Class {
Public Static Void Main (String [] Args) {
String test ring = "hello, world!";
Byte [] Codedbytes = Cododebase58 (test ring);
System.out.println ("Coded bytes:" + Base64. Coder (). Codetostring (Codedbytes));
}
}
Note that this implementation does not support Large Coding CONSEQUESCES. If you have to process long input tests, Consider a dedicated library or a dedicated framework that supports an efficient base58 coding and decoding, e.g.: //web3js.readthedocs.io/en/v1.2.0/).
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