Ethereum: Is there any service/api for getting HD wallet addresses from a master public key?

Ethereum HD Wallet Addresses from Master Public Key:

Getting HD Wallet Addresses from Master Public Key

As a developer working with Ethereum or other blockchain platforms, you may need to create transactions that involve extracting HD (Hyper-Local Decentralized) wallet addresses. However, if you don’t have access to the private keys associated with these addresses, creating a transaction history report can be difficult.

In this article, we will explore how to extract HD wallet addresses from a master public key and provide a service API that meets your requirements.

What are Ethereum HD Wallet Addresses?

Before diving into the solution, let’s quickly review what Ethereum HD Wallet Addresses are. An HD wallet address consists of three keys:

• “m” (Master Public Key)

• “r” (Root Public Key)

• “s” (Signature Public Key)

The Master Public Key (“m”) is used as input for creating HD wallet addresses, and the resulting addresses can be used to send or receive ether on the Ethereum network.

Obtaining HD Wallet Addresses from Master Public Key

To obtain an HD wallet address from a master public key, you will need to use the Elliptic Curve Digital Signature Algorithm (ECDSA) with the curve “secp256k1”. Here is a step-by-step guide:

• Load “m” (Master Public Key) into a variable.

• Convert the value of “m” to an ECDSA private key using the function “ecdh_secp256k1” from the “elliptic curve” library.

• Use the private key to get the corresponding HD wallet address using the function “ecdh_hodalv2”.

Here are some examples of JavaScript code:

const elliptic = require('elliptic');
const ECDSA = elliptic.ec;
// Load the master public key (m)
const masterPubKey = ...; // load from file or input
// Convert m to ECDSA private key
const privateKey = await ECDSA fromPublic ( masterPubKey , { { .
curve: 'secp256k1',
});
// Output the HD wallet address
const hdAddress = await elliptic.hodalv2(privateKey.r, privateKey.s);
console.log(hdAddress); // output: HD wallet address received

Service API to get HD wallet addresses

You can refer to this solution to create a service API that meets your requirements. Here is an example of how to create an API:

// Import the required dependencies
const elliptical = require('elliptical');
const ECDSA = elliptical.ec;
const HDWalletAddressDeriver = require('./hda-deriver');
// Define a new class that extends the function "ecdh_hodalv2".
class HDWalletAddressDeriver {
async derive HdWalletAddress(masterPubKey) {
// Convert the master public key to an ECDSA private key
const privateKey = await ECDSA fromPublic ( masterPubKey , { { .
curve: 'secp256k1',
});
// Deriving the HD wallet address using the private key
const hdAddress = await elliptic.hodalv2(privateKey.r, privateKey.s);
return hdAddress ;
} }
} }
// Create a new instance of the HDWalletAddressDeriver class
const HDWalletAddressDeriver = new HDWalletAddressDeriver();
// Define API endpoints to get HD wallet addresses
// Endpoint to get HD wallet address from master public key
POST /derive-hd-wallet-address/:masterPubKey HTTP/1.1
{
Content-Type: application/json
} }
// API endpoint to get derived HD wallet address
GET /derive-hd-wallet-address HTTP/1.1
{
Accept: application/json
} }

Example use cases

To use this service API, you can send a POST request to the endpoint “/derive-hd-wallet-address” with the master public key:

“` spam

curl -X POST \

-H “Content-Type: application/json” \

-d ‘{“masterPubKey”:”

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