Here is an article on how to sign a private key message using Bitcoin in Typescript.
Signing messages with private keys in Bitcoin
In this article, we’ll show you how to use the bitcoinjs-lib library to create a private key from your seed phrase and then use it to sign messages. We will also show how to tie the private key to the end points of our “BTCADDRESS” ANFTADDRESS ".
Step 1: Create a private key
You must first create a private key from your phrase. You can do this by starting the following command in your terminal:
Bash
BC -l
`
Replace
Step 2: Import libraries and load a private key
Next, we must import the bitcoinjs-lib and load our private key:
`Typescript
Import * as bitcoin from "bitcoinjs-lib";
Import * as ECC from "small SecP256K1";
Constietkey = waiting for a request ('./ private_key.pem');
Step 3: Create a message to sign
Create a message you want to sign. For example, let’s say we have the address of the NFT and the recipient’s address:
`Typescript
Const Contractaddress = '0x ...'; // replace the contract address
Const Rectionaddress = '0x ...'; // replace the recipient's address
Step 4: Sign message
Now we can make our message and private key an instance of “Bitcoinmessage”:
`Typescript
Const bitcoinmessage = require ('bitcoinjs-lib'). Bitcoinmessage;
Const BitcoinMessage = New Bitcoinmessage ({
Agreement,
Recipientaddress,
Data: “Hi, the world!”,
});
Const Signature = acait bitcoin.signmessage (privatekey, {
Address: bitcoinmessage.address.btc,
Network: Bitcoinnetwork.MineConomy,
});
Step 5: Tie private key to end points
Finally, we need to commit our private key to the end points of our application “BTCADDRESS” A ”NFTADDRESS”:
“ Typescript
Const bitcoin = require (‘bitcoinjs-lib’);
Const Ecc = Require (‘Small Secp256K1’);
// Define the endpoints
Const ContontPoint = ‘
Const RectionPoint = ‘
// Create a private key from a seed phrase file
Constietkey = waiting for a request (‘./ private_key.pem’);
// load our private key
Const bitcoinprivatekey = expect ecc.KeyFromprivate (privatekey);
// tie the private key to the end points
Async function Getndpoint (Privatekey) {
Const contract = new bitcoinmessage ({{
Agreement,
Data: “Hi, the world!”,
});
Const Signature = acait bitcoin.signmessage (privatekey, {
Address: bitcoinmessage.address.btc,
Network: Bitcoinnetwork.MineConomy,
});
return {contract, signature};
}
ASYNC GetContracttendPoint (privatekey) {
// Create a private key from a seed phrase file
Constietkey = waiting for a request (‘./ private_key.pem’);
Const bitcoinprivatekey = expect ecc.KeyFromprivate (privatekey);
// load our private key
Const bitcoin = require (‘bitcoinjs-lib’);
// tie a private key to the endpoint of the contract
Return a new promise ((Resoling, Rection) => {
Getndpoint (Privatekey) .then ((data) => {
resolve (data);
}). Catch ((error) => {
refuse (error);
});
});
}
ASYNC function GetRicipientPoint (privatekey) {
// Create a private key from a seed phrase file
Constietkey = waiting for a request (‘./ private_key.pem’);
Const bitcoinprivatekey = expect ecc.KeyFromprivate (privatekey);
// load our private key
Const bitcoin = require (‘bitcoinjs-lib’);
// tie the private key to the recipient’s endpoint
Return a new promise ((Resoling, Rection) => {
Getndpoint (Privatekey) .then ((data) => {
Resoling ({contract: data.contract, signature: data.signature});
}).