bigchaindb
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js-bigchaindb-driver
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Simplify README.md and change example

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vrde 2017-06-23 15:00:55 +02:00
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@ -33,46 +33,40 @@ npm install bigchaindb-driver
### Example: Create a transaction
```js
import * as driver from 'bigchaindb-driver'
const driver = require('bigchaindb-driver')
// BigchainDB server instance or IPDB (e.g. https://test.ipdb.io/api/v1/)
const API_PATH = 'http://localhost:9984/api/v1/'
// Create a new user with a public-private key pair
// (or a whole bunch of them, nobody's counting)
// Create a new keypair.
const alice = new driver.Ed25519Keypair()
// Construct a transaction payload
// `driver.Transaction.makeCreateTransaction()`: create a new asset
// `driver.Transaction.makeTransferTransaction()`: transfer an existing asset
const tx = driver.Transaction.makeCreateTransaction(
{ assetMessage: 'My very own asset...' },
{ metaDataMessage: 'wrapped in a transaction' },
// Define the asset to store, in this example it is the current temperature
// (in Celsius) for the city of Berlin.
{ city: 'Berlin, DE', temperature: 22, datetime: new Date().toString() },
// Metadata contains information about the transaction itself
// (can be `null` if not needed)
{ what: 'My first BigchainDB transaction' },
// A transaction needs an output
// `driver.Transaction.makeOutput()`: requires a crypto-condition
// `driver.Transaction.makeEd25519Condition()`: simple public key output
[ driver.Transaction.makeOutput(
driver.Transaction.makeEd25519Condition(alice.publicKey))
],
alice.publicKey
)
// Optional: You've got everything you need, except for an asset
// and metadata. Maybe define them here, any JSON-serializable object
// will do
// Ok, now that you have a transaction, you need to *sign* it
// cause, you know... cryptography and ¯\_(ツ)_/¯
// Sign/fulfill the transaction with private keys
// Sign the transaction with private keys
const txSigned = driver.Transaction.signTransaction(tx, alice.privateKey)
// Send the transaction off to BigchainDB
let conn = new driver.Connection(API_PATH)
const conn = new driver.Connection(API_PATH)
conn.postTransaction(txSigned)
.then(() => conn.getStatus(txSigned.id))
.then((res) => console.log('Transaction status:', res.status))
.then(() => conn.pollStatusAndFetchTransaction(txSigned.id))
.then(retrievedTx => console.log('Transaction', retrievedTx.id, 'successfully posted.'))
```
## Use a pre-built image (browser only)
@ -82,54 +76,54 @@ conn.postTransaction(txSigned)
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML5 boilerplate – all you really need…</title>
<title>BigchainDB boilerplate</title>
<!-- Adjust version to your needs -->
<script src="https://unpkg.com/bigchaindb-driver@0.1.1/dist/browser/bigchaindb-driver.window.min.js"></script>
<script>
<script src="https://unpkg.com/bigchaindb-driver@0.2.0/dist/browser/bigchaindb-driver.window.min.js"></script>
<script>
// BigchainDB server instance or IPDB (e.g. https://test.ipdb.io/api/v1/)
const API_PATH = 'http://localhost:9984/api/v1/'
// Create a new user with a public-private key pair
// (or a whole bunch of them, nobody's counting)
// Create a new keypair.
const alice = new BigchainDB.Ed25519Keypair()
// Construct a transaction payload
// `BigchainDB.Transaction.makeCreateTransaction()`: create a new asset
// `BigchainDB.Transaction.makeTransferTransaction()`: transfer an existing asset
const tx = BigchainDB.Transaction.makeCreateTransaction(
{ assetMessage: 'My very own asset...' },
{ metaDataMessage: 'wrapped in a transaction' },
// Define the asset to store, in this example it is the current temperature
// (in Celsius) for the city of Berlin.
{ city: 'Berlin, DE', temperature: 22, datetime: new Date().toString() },
// Metadata contains information about the transaction itself
// (can be `null` if not needed)
{ what: 'My first BigchainDB transaction' },
// A transaction needs an output
// `BigchainDB.Transaction.makeOutput()`: requires a crypto-condition
// `BigchainDB.Transaction.makeEd25519Condition()`: simple public key output
[ BigchainDB.Transaction.makeOutput(
BigchainDB.Transaction.makeEd25519Condition(alice.publicKey))
],
alice.publicKey
)
// Optional: You've got everything you need, except for an asset
// and metadata. Maybe define them here, any JSON-serializable object
// will do
// Ok, now that you have a transaction, you need to *sign* it
// cause, you know... cryptography and ¯\_(ツ)_/¯
// Sign/fulfill the transaction with private keys
// Sign the transaction with private keys
const txSigned = BigchainDB.Transaction.signTransaction(tx, alice.privateKey)
// Send the transaction off to BigchainDB
let conn = new BigchainDB.Connection(API_PATH)
conn.postTransaction(txSigned)
.then(() => conn.getStatus(txSigned.id))
.then((res) => console.log('Transaction status:', res.status))
.then(() => conn.pollStatusAndFetchTransaction(txSigned.id))
.then(res => {
const elem = document.getElementById('lastTransaction')
elem.href = API_PATH + 'transactions/' + txSigned.id
elem.innerText = txSigned.id
console.log('Transaction', txSigned.id, 'accepted')
})
// Check console for the transaction's status
</script>
</head>
<body id="home">
<h1>Hello BigchainDB</h1>
<h1>Hello BigchainDB</h1>
<p>Your transaction id is: <a id="lastTransaction" target="_blank"><em>processing</em></a></p>
</body>
</html>
```