Ethereum: Is there any service/api for deriving HD wallet addresses from a master public key?
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Here is an article on Addresses of Ethereum HD wallet from a teacher public key:
HD wallet diving from a teacher’s public key
As a developer that works with Ethereum or other blockchain platforms, it is possible that it should create transactions that involve HD wallet addresses (decentralized hyperlocals). However, if you do not have access to private keys associated with thesis addresses, creating a transaction history report can be a challenge.
In this article, we will explore how to derive HD wallet addresses from a teacher public key and provide a service API that meets its requirements.
** What are the directions of the Ethereum HD wallet?
Before immersing ourselves in the solution, let’s quickly review what the directions of the Ethereum HD wallet are. An HD wallet address is composed of three keys:
- M
(Master Public Key)
- R
(Root Public Key)
- S (Public signature key)
The Master Public Key (‘M) serves as the entrance to create HD wallet addresses, and the resulting addresses can be used to send or receive ether in the Ethereum network.
HD wallet diving from a teacher's public key
To obtain an HD wallet address from a teacher teacher, you must use the digital signature algorithm of the elliptical curve (ECDSA) with theSECP256K1curve. Here is a step by step guide:
- Load theM
(Public Master Key) in a variable.
- Convert theM
value into a private key ECDSA using the function 'ECDH_SECP256K1of the library’ Elliptic-Curves.
- Use the private key to derive the corresponding HD wallet address using theECDH_HODALV2
function.
Here is some sample code in JavaScript:
JavaScript
Constat elliptic = require ('elliptic');
Const ecdsa = elliptic.ec;
// Load the Public Key Teacher (M)
Conte masterpubkey = ...; // Load from the file or the entrance
// convert M to the private key of ECDSA
constantly private = wait Ecdsa.frompublic (masterpubkey, {
Curve: 'SECP256K1',
});
// Derive the direction of the HD wallet
Conte hdadedress = wait elliptic.hodalv2 (privateatekey.r, privatekey.s);
Console.log (Hdaddress); // Output: The Derived HD wallet address
SERVICE API for HD Wallet Address Diving
To create a service API that meets your requirements, you can take advantage of this solution. Here is an example of how to design the API:
JavaScript
// Import required units
Constat elliptic = require ('elliptic');
Const ecdsa = elliptic.ec;
Const hdwalletaddress derive = request ('./ hda dive');
// Define a new class that extends theECDH_HODALV2function
HDWALLETADDRESS DERVOVER class {
ASYNC DERIVE HDWALLETADDRESS (MASTERPUBKEY) {
// Convert the teacher's public key to the private key of ECDSA
constantly private = wait Ecdsa.frompublic (masterpubkey, {
Curve: 'SECP256K1',
});
// Derive the HD wallet address using the private key
Conte hdadedress = wait elliptic.hodalv2 (privateatekey.r, privatekey.s);
Return Haddress;
}
}
// Create a new instance of theHDWALLETADDRESS DIVIFIERclass
Const hdwalletaddress deriver = new hdwalletaddress diver ();
// Define API final points for diving HD wallet addresses
// Final point to derive an HD wallet address from a teacher teacher
Post/Derive-HD Wallet-Address/: Masterpubkey HTTP/1.1
{
Type of content: application/json
}
// Final Point of the API to obtain the Derived HD wallet address
GET /DERIVE-HD WALLET-ADDRESS HTTP /1.1
{
Accept: application/json
}
Example of use cases
To use this service API, you can send a publication application to the final point/Derive-HD Wallet-Addresswith the public key as an entry:
` Bash
Curl -x post \
http: // localhost: 3000/derive-hd-wallet-address/masterpubkey \
-H ‘Type of content: application/json’ \
-D ‘{« Masterpubkey »: « …
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