Options
All
  • Public
  • Public/Protected
  • All
Menu

Package bns

@stacks/bns

A package for interacting with the BNS contract on the Stacks blockchain.

What is BNS?

The Blockchain Naming System (BNS) is a network system that binds Stacks usernames to off-chain state without relying on any central points of control.

Installation

npm install --save @stacks/bns

Example Usages

Check availability

Check if name can be registered

import { canRegisterName } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';

const result = await canRegisterName({ fullyQualifiedName, network });
// true / false

Get name price

Get price of name registration in microstacks

import { getNamePrice } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';

const price = await getNamePrice({ fullyQualifiedName, network });
// price of name registration in microstacks

Steps to register name

Send two transaction to secure a name, preorder and then register.

  1. Preorder: Generates a name preorder transaction. First step in registering a name. This transaction does not reveal the name that is about to be registered. And it sets the amount of STX to be burned for the registration.
  2. Register: Generates a name transfer transaction. This changes the owner of the registered name.

Preorder

import { buildPreorderNameTx } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';
import {
TxBroadcastResult,
broadcastTransaction,
publicKeyToString,
TransactionSigner,
createStacksPrivateKey,
pubKeyfromPrivKey,
} from '@stacks/transactions';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';
const salt = 'salt';
const stxToBurn = 200n;
// warning: Do not expose your private key by hard coding in code. Use env variables to load private keys.
const privateKey = '<insert private key here>'; // process.env.privateKey
const publicKey = publicKeyToString(pubKeyfromPrivKey(privateKey));

// construct an unsigned bns priorder-name transaction
// note: builder functions build transactions with AnchorMode set to Any
const unsignedTX = await buildPreorderNameTx({
fullyQualifiedName,
salt,
stxToBurn,
publicKey,
network,
});

// Sign the transaction with private key and broadcast to the network
const signer = new TransactionSigner(unsignedTX);
signer.signOrigin(createStacksPrivateKey(privateKey));

const reply: TxBroadcastResult = await broadcastTransaction(signer.transaction, network);
// reply.txid
// Wait for the transaction to be confirmed before sending register transaction

Register

import { buildRegisterNameTx } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';
import {
TxBroadcastResult,
broadcastTransaction,
publicKeyToString,
TransactionSigner,
createStacksPrivateKey,
pubKeyfromPrivKey,
} from '@stacks/transactions';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';
// warning: Do not expose your private key by hard coding in code. Use env variables to load private keys.
const privateKey = '<insert private key here>'; // process.env.privateKey
const zonefile = 'zonefile';
const salt = 'salt';
const publicKey = publicKeyToString(pubKeyfromPrivKey(privateKey));

// construct an unsigned bns register-name transaction
// note: builder functions build transactions with AnchorMode set to Any
const unsignedTX = await buildRegisterNameTx({
fullyQualifiedName,
publicKey,
salt,
zonefile,
network,
});
// Sign the transaction with private key and broadcast to the network
const signer = new TransactionSigner(unsignedTX);
signer.signOrigin(createStacksPrivateKey(privateKey));

const reply: TxBroadcastResult = await broadcastTransaction(signer.transaction, network);
// reply.txid

Transfer name

Transfer the ownership to other address

import { buildTransferNameTx } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';
import {
TxBroadcastResult,
broadcastTransaction,
publicKeyToString,
TransactionSigner,
createStacksPrivateKey,
pubKeyfromPrivKey,
} from '@stacks/transactions';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';
const newOwnerAddress = 'ST1HB1T8WRNBYB0Y3T7WXZS38NKKPTBR3EG9EPJKR';
// warning: Do not expose your private key by hard coding in code. Use env variables to load private keys.
const privateKey = '<insert private key here>'; // process.env.privateKey
const zonefile = 'zonefile';
const publicKey = publicKeyToString(pubKeyfromPrivKey(privateKey));

// construct an unsigned bns transfer-name transaction
// note: builder functions build transactions with AnchorMode set to Any
const unsignedTX = await buildTransferNameTx({
fullyQualifiedName,
newOwnerAddress,
publicKey,
zonefile,
network
});

// Sign the transaction with private key and broadcast to the network
const signer = new TransactionSigner(unsignedTX);
signer.signOrigin(createStacksPrivateKey(privateKey));

const reply: TxBroadcastResult = await broadcastTransaction(signer.transaction, network);
// reply.txid

Update name

Generates a name update transaction. This changes the zonefile for the registered name.

import { buildUpdateNameTx } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';
import {
TxBroadcastResult,
broadcastTransaction,
publicKeyToString,
TransactionSigner,
createStacksPrivateKey,
pubKeyfromPrivKey,
} from '@stacks/transactions';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';
// warning: Do not expose your private key by hard coding in code. Use env variables to load private keys.
const privateKey = '<insert private key here>'; // process.env.privateKey
const zonefile = 'zonefile';
const publicKey = publicKeyToString(pubKeyfromPrivKey(privateKey));

// construct an unsigned bns update-name transaction
// note: builder functions build transactions with AnchorMode set to Any
const unsignedTX = await buildUpdateNameTx({
fullyQualifiedName,
zonefile,
publicKey,
network,
});
// Sign the transaction with private key and broadcast to the network
const signer = new TransactionSigner(unsignedTX);
signer.signOrigin(createStacksPrivateKey(privateKey));

const reply: TxBroadcastResult = await broadcastTransaction(signer.transaction, network);
// reply.txid

Renew name

Generates a name renew transaction. This renews a name registration.

import { buildRenewNameTx } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';
import {
TxBroadcastResult,
broadcastTransaction,
publicKeyToString,
TransactionSigner,
createStacksPrivateKey,
pubKeyfromPrivKey,
} from '@stacks/transactions';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';
const stxToBurn = 10n;
const newOwnerAddress = 'ST1HB1T8WRNBYB0Y3T7WXZS38NKKPTBR3EG9EPJKR';
// warning: Do not expose your private key by hard coding in code. Use env variables to load private keys.
const privateKey = '<insert private key here>'; // process.env.privateKey
const zonefile = 'zonefile';
const publicKey = publicKeyToString(pubKeyfromPrivKey(privateKey));

// construct an unsigned bns renew-name transaction
// note: builder functions build transactions with AnchorMode set to Any
const unsignedTX = await buildRenewNameTx({
fullyQualifiedName,
stxToBurn,
newOwnerAddress,
zonefile,
publicKey,
network,
});

// Sign the transaction with private key and broadcast to the network
const signer = new TransactionSigner(unsignedTX);
signer.signOrigin(createStacksPrivateKey(privateKey));

const reply: TxBroadcastResult = await broadcastTransaction(signer.transaction, network);
// reply.txid

Revoke name

Generates a name revoke transaction. This revokes a name registration.

import { buildRevokeNameTx } from '@stacks/bns';
import { StacksTestnet, StacksMainnet } from '@stacks/network';
import {
TxBroadcastResult,
broadcastTransaction,
publicKeyToString,
TransactionSigner,
createStacksPrivateKey,
pubKeyfromPrivKey,
} from '@stacks/transactions';

// for mainnet, use `StacksMainnet()`
const network = new StacksTestnet();
const fullyQualifiedName = 'name.id';
// warning: Do not expose your private key by hard coding in code. Use env variables to load private keys.
const privateKey = '<insert private key here>'; // process.env.privateKey
const publicKey = publicKeyToString(pubKeyfromPrivKey(privateKey));

// construct an unsigned bns revoke-name transaction
// note: builder functions build transactions with AnchorMode set to Any
const unsignedTX = await buildRevokeNameTx({
fullyQualifiedName,
publicKey,
network,
});
// Sign the transaction with private key and broadcast to the network
const signer = new TransactionSigner(unsignedTX);
signer.signOrigin(createStacksPrivateKey(privateKey));

const reply: TxBroadcastResult = await broadcastTransaction(signer.transaction, network);
// reply.txid

Index

Variables

BNS_CONTRACT_NAME: "bns" = 'bns'

Functions

  • Generates a namespace name import transaction. An optional step in namespace registration.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a name preorder transaction. First step in registering a name. This transaction does not reveal the name that is about to be registered. And it sets the amount of STX to be burned for the registration.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a namespace preorder transaction. First step in registering a namespace. This transaction does not reveal the namespace that is about to be registered. And it sets the amount of STX to be burned for the registration.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a ready namespace transaction. Final step in namespace registration. This completes the namespace registration and makes the namespace available for name registrations.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a name registration transaction. Second and final step in registering a name.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a name renew transaction. This renews a name registration.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a namespace reveal transaction. Second step in registering a namespace.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a name revoke transaction. This revokes a name registration.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a name transfer transaction. This changes the owner of the registered name.

    Since the underlying NFT will be transferred, you will be required to add a post-condition to this transaction before broadcasting it.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Generates a name update transaction. This changes the zonefile for the registered name.

    Resolves to the generated StacksTransaction

    Parameters

    Returns Promise<StacksTransaction>

  • Check if name can be registered

    Parameters

    Returns Promise<boolean>

    that resolves to true if the operation succeeds

  • Get price of name registration in microstacks

    Parameters

    Returns Promise<bigint>

    that resolves to a BN object number of microstacks if the operation succeeds

  • Get price of namespace registration in microstacks

    Parameters

    Returns Promise<bigint>

    that resolves to a BN object number of microstacks if the operation succeeds

Generated using TypeDoc