mirror of
https://github.com/bigchaindb/js-bigchaindb-driver.git
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176 lines
7.7 KiB
Markdown
176 lines
7.7 KiB
Markdown
# [](https://www.bigchaindb.com)
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> Official JavaScript driver for [BigchainDB](https://github.com/bigchaindb/bigchaindb) with some naive helpers to get you on your way making transactions in Node.js and the browser.
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[](https://gitter.im/bigchaindb/js-bigchaindb-driver?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
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[](https://www.npmjs.com/package/bigchaindb-driver)
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[](https://codecov.io/gh/bigchaindb/js-bigchaindb-driver)
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[](https://github.com/ascribe/javascript)
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[](https://travis-ci.org/bigchaindb/js-bigchaindb-driver)
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[](https://greenkeeper.io/)
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- Documentation: https://docs.bigchaindb.com/projects/js-driver/en/latest/usage.html
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## Compatibility
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| BigchainDB Server | BigchainDB JavaScript Driver |
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| ----------------- |------------------------------|
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| `0.10` | `0.1.x` |
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| `1.0.0` | `0.3.x` |
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| `>= 1.3.0` | `3.x.x` |
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## Breaking changes
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Version 3.2 of BigchainDB JavaScript Driver introduces a new way of creating transfer transactions. Check [older versions](https://docs.bigchaindb.com/projects/js-driver/en/latest/readme.html#features)
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## Contents
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* [Installation and Usage with package managers (npm/yarn)](#installation-and-usage-with-package-managers-npmyarn)
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* [Example: Create a transaction](#example-create-a-transaction)
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* [Use a pre-built image (browser only)](#use-a-pre-built-image-browser-only)
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* [Documentation](#bigchaindb-documentation)
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* [Authors](#authors)
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* [License](#license)
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## Installation and Usage with package managers (npm/yarn)
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```bash
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npm install bigchaindb-driver
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```
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### Example: Create a transaction
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```js
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const driver = require('bigchaindb-driver')
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// BigchainDB server instance or IPDB (e.g. https://test.ipdb.io/api/v1/)
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const API_PATH = 'http://localhost:9984/api/v1/'
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// Create a new keypair.
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const alice = new driver.Ed25519Keypair()
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// Construct a transaction payload
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const tx = driver.Transaction.makeCreateTransaction(
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// Define the asset to store, in this example it is the current temperature
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// (in Celsius) for the city of Berlin.
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{ city: 'Berlin, DE', temperature: 22, datetime: new Date().toString() },
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// Metadata contains information about the transaction itself
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// (can be `null` if not needed)
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{ what: 'My first BigchainDB transaction' },
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// A transaction needs an output
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[ driver.Transaction.makeOutput(
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driver.Transaction.makeEd25519Condition(alice.publicKey))
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],
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alice.publicKey
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)
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// Sign the transaction with private keys
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const txSigned = driver.Transaction.signTransaction(tx, alice.privateKey)
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// Send the transaction off to BigchainDB
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const conn = new driver.Connection(API_PATH)
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conn.postTransaction(txSigned)
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.then(() => conn.pollStatusAndFetchTransaction(txSigned.id))
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.then(retrievedTx => console.log('Transaction', retrievedTx.id, 'successfully posted.'))
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```
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## Use a pre-built image (browser only)
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```html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>BigchainDB boilerplate</title>
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<!-- Adjust version to your needs -->
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<script src="https://unpkg.com/bigchaindb-driver@0.3.0/dist/browser/bigchaindb-driver.window.min.js"></script>
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<script>
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// BigchainDB server instance or IPDB (e.g. https://test.ipdb.io/api/v1/)
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const API_PATH = 'http://localhost:9984/api/v1/'
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// Create a new keypair.
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const alice = new BigchainDB.Ed25519Keypair()
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// Construct a transaction payload
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const tx = BigchainDB.Transaction.makeCreateTransaction(
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// Define the asset to store, in this example it is the current temperature
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// (in Celsius) for the city of Berlin.
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{ city: 'Berlin, DE', temperature: 22, datetime: new Date().toString() },
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// Metadata contains information about the transaction itself
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// (can be `null` if not needed)
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{ what: 'My first BigchainDB transaction' },
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// A transaction needs an output
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[ BigchainDB.Transaction.makeOutput(
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BigchainDB.Transaction.makeEd25519Condition(alice.publicKey))
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],
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alice.publicKey
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)
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// Sign the transaction with private keys
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const txSigned = BigchainDB.Transaction.signTransaction(tx, alice.privateKey)
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// Send the transaction off to BigchainDB
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let conn = new BigchainDB.Connection(API_PATH)
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conn.postTransaction(txSigned)
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.then(() => conn.pollStatusAndFetchTransaction(txSigned.id))
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.then(res => {
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const elem = document.getElementById('lastTransaction')
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elem.href = API_PATH + 'transactions/' + txSigned.id
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elem.innerText = txSigned.id
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console.log('Transaction', txSigned.id, 'accepted')
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})
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// Check console for the transaction's status
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</script>
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</head>
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<body id="home">
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<h1>Hello BigchainDB</h1>
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<p>Your transaction id is: <a id="lastTransaction" target="_blank"><em>processing</em></a></p>
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</body>
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</html>
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```
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## BigchainDB Documentation
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- [HTTP API Reference](https://docs.bigchaindb.com/projects/server/en/latest/http-client-server-api.html)
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- [The Transaction Model](https://docs.bigchaindb.com/projects/server/en/latest/data-models/transaction-model.html?highlight=crypto%20conditions)
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- [Inputs and Outputs](https://docs.bigchaindb.com/projects/server/en/latest/data-models/inputs-outputs.html)
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- [Asset Transfer](https://docs.bigchaindb.com/projects/py-driver/en/latest/usage.html#asset-transfer)
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- [All BigchainDB Documentation](https://docs.bigchaindb.com/)
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## Speed Optimizations
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This implementation plays "safe" by using JS-native (or downgradable) libraries for its crypto-related functions to keep compatibilities with the browser. If you do want some more speed, feel free to explore the following:
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* [chloride](https://github.com/dominictarr/chloride), or its underlying [sodium](https://github.com/paixaop/node-sodium) library
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* [node-sha3](https://github.com/phusion/node-sha3) -- **MAKE SURE** to use [steakknife's fork](https://github.com/steakknife/node-sha3) if [the FIPS 202 upgrade](https://github.com/phusion/node-sha3/pull/25) hasn't been merged (otherwise, you'll run into all kinds of hashing problems)
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## Authors
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* inspired by [`js-bigchaindb-quickstart`](https://github.com/sohkai/js-bigchaindb-quickstart) of @sohkhai [thanks]
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* BigchainDB <dev@bigchaindb.com>
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## License
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```
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Copyright 2017 BigchainDB GmbH
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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```
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