Here is an article on how to sign a message with a private key using Bitcoin on TypeScript.
Signing messages with private keys on Bitcoin
In this article, we will show you how to use the BitcoInjs-LIB Library to create a private key from your seed sentence and then use it to sign messages. We will also demonstrate how to link the private key to theBTCADDRESSe nftaddressend points of our application.
Step 1: Create a private key
First, you need to create a private key from your seed sentence. You can do this by running the following command at your terminal:
Bash
BC -L
`
Replace
Step 2: Import libraries and carry the private key
Then we need to import the bitcoinjs-lib 'library and load our private key:
Different
Import * as Bitcoin of ‘Bitcoinjs-Lib’;
IMPORTATION * as ECC of ‘Tiny-SecP256K1’;
Const PrivateKey = Wait Requires (‘./ Private_Key.Pem’);
`
Step 3: Create a message to sign
Create a message you want to sign. For example, let’s say we have an NFT contract address and a recipient address:
`Different
CONSTT CONTRACTADDRESS = ‘0x …’; // Replace with contract address
ConstraDdress = ‘0x …’; // Replace with the recipient’s address
`
Step 4: Subscribe to the message
Now we can create an instance bitcoinmessage from our message and private key:
`Different
Consta Bitcoinmessage = Requires (‘Bitcoinjs-Lib’). bitcoinmessage;
CONST BITCOINMESSAGE = NEW BITCOINMESSAGE ({
CONTRACTEDDRESS,
receptoraddress,
Data: ‘Hello, world!’
});
CONST SIGNATURE = Wait Bitcoin.SignMessage (PrivateKey, {
Address: Bitcoinmessage.address.btc,
Network: Bitcoinnetwork.Mineconomy,
});
`
Step 5: Turn on the private key to the end points
Finally, we need to link our private key to the BTCADDRESS enftaddress end points of our application:
`Different
CONST BITCOIN = Requires (‘Bitcoinjs-Lib’);
Consta ECC = Requires (‘Tiny-SecP256K1’);
// Define the terminals
CONST CONTRACTENDPOINT = ‘
CONST RECEITTORENDPOINT = ‘
// Create a private key from the seed phrase file
Const PrivateKey = Wait Requires (‘./ Private_Key.Pem’);
// Load our private key
CONST BITCOINPRIVATEKE = Wait ECC.KeyfromPrivate (PrivateKey);
// connect the private key to the terminals
Getendpoint asynchreated function (privatekey) {
CONSTT CONTRACT = NEW BITCOINMESSAGE ({
CONTRACTEDDRESS,
Data: ‘Hello, world!’
});
CONST SIGNATURE = Wait Bitcoin.SignMessage (PrivateKey, {
Address: Bitcoinmessage.address.btc,
Network: Bitcoinnetwork.Mineconomy,
});
Return {contract, signature};
}
GetContrendendPoint asynchronous function (privatekey) {
// Create a private key from the seed phrase file
Const PrivateKey = Wait Requires (‘./ Private_Key.Pem’);
CONST BITCOINPRIVATEKE = Wait ECC.KeyfromPrivate (PrivateKey);
// Load our private key
CONST BITCOIN = Requires (‘Bitcoinjs-Lib’);
// Link the private key to the contract endpoint
Return new promise ((resolve, reject) => {
Getendpoint (PrivateKey) .then ((data) => {
resolve (data);
}). Catch ((error) => {
reject (error);
});
});
}
asynchronous function getrecipiendpoint (privatekey) {
// Create a private key from the seed phrase file
Const PrivateKey = Wait Requires (‘./ Private_Key.Pem’);
CONST BITCOINPRIVATEKE = Wait ECC.KeyfromPrivate (PrivateKey);
// Load our private key
CONST BITCOIN = Requires (‘Bitcoinjs-Lib’);
// connect the private key to the recipient’s endpoint
Return new promise ((resolve, reject) => {
Getendpoint (PrivateKey) .then ((data) => {
RESOLVES ({Contract: DATE.CONTRACT, SIGNATURE: DATE.SIGNATURE});
}).