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| # `@liquality/bitcoin-esplora-swap-find-provider` <img align="right" src="https://raw.githubusercontent.com/liquality/chainabstractionlayer/master/liquality-logo.png" height="80px" /> | ||
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| [](https://travis-ci.com/liquality/chainabstractionlayer) | ||
| [](https://coveralls.io/github/liquality/chainabstractionlayer?branch=master) | ||
| [](https://github.com/standard/standard) | ||
| [](../../LICENSE.md) | ||
| [](https://npmjs.com/package/@liquality/bitcoin-esplora-swap-find-provider) | ||
| [](https://gitter.im/liquality/Lobby?source=orgpage) | ||
| [](https://t.me/Liquality) [](https://greenkeeper.io/) | ||
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| > :warning: This project is under heavy development. Expect bugs & breaking changes. | ||
| ### :pencil: [Introductory Blog Post: The Missing Tool to Cross-Chain Development](https://medium.com/liquality/the-missing-tool-to-cross-chain-development-2ebfe898efa1) | ||
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| Query different blockchains with account management using a single and simple interface. | ||
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| ## Installation | ||
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| ```bash | ||
| npm i @liquality/bitcoin-esplora-swap-find-provider | ||
| ``` | ||
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| or | ||
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| ```html | ||
| <script src="https://cdn.jsdelivr.net/npm/@liquality/bitcoin-esplora-swap-find-provider@0.2.3/dist/bitcoin-esplora-swap-find-provider.min.js"></script> | ||
| <!-- sourceMap at https://cdn.jsdelivr.net/npm/@liquality/bitcoin-esplora-swap-find-provider@0.2.3/dist/bitcoin-esplora-swap-find-provider.min.js.map --> | ||
| <!-- available as window.BitcoinEsploraSwapFindProvider --> | ||
| ``` | ||
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| ## Usage | ||
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| ```js | ||
| import BitcoinEsploraSwapFindProvider from '@liquality/bitcoin-esplora-swap-find-provider' | ||
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| const apiProvider = new BitcoinEsploraSwapFindProvider('https://blockstream.info/testnet/api') | ||
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| await apiProvider.getBlockByNumber(1) | ||
| ``` | ||
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| ## License | ||
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| [MIT](../../LICENSE.md) |
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packages/bitcoin-esplora-swap-find-provider/lib/BitcoinEsploraSwapFindProvider.js
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| import axios from 'axios' | ||
| import Provider from '@liquality/provider' | ||
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| import { version } from '../package.json' | ||
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| export default class BitcoinEsploraSwapFindProvider extends Provider { | ||
| constructor (url) { | ||
| super() | ||
| this.url = url | ||
| this._axios = axios.create({ | ||
| baseURL: url, | ||
| responseType: 'text', | ||
| transformResponse: undefined // https://github.com/axios/axios/issues/907, | ||
| }) | ||
| } | ||
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| async findAddressTransaction (address, currentHeight, predicate) { | ||
| // TODO: This does not go through pages as swap addresses have at most 2 transactions | ||
| // Investigate whether retrieving more transactions is requiredl. | ||
| const response = await this._axios.get(`/address/${address}/txs`) | ||
| const transactions = response.data | ||
| const transaction = transactions.find(tx => { | ||
| const formattedTransaction = this.getMethod('formatTransaction')(tx, currentHeight) | ||
| return predicate(formattedTransaction) | ||
| }) | ||
| if (transaction) return this.getMethod('formatTransaction')(transaction, currentHeight) | ||
| } | ||
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| async findSwapTransaction (recipientAddress, refundAddress, secretHash, expiration, blockNumber, predicate) { | ||
| const currentHeight = await this.getMethod('getBlockHeight')() | ||
| const swapOutput = this.getMethod('getSwapOutput')(recipientAddress, refundAddress, secretHash, expiration) | ||
| const paymentVariants = this.getMethod('getSwapPaymentVariants')(swapOutput) | ||
| for (const paymentVariant of Object.values(paymentVariants)) { | ||
| const addressTransaction = this.findAddressTransaction(paymentVariant.address, currentHeight, predicate) | ||
| if (addressTransaction) return addressTransaction | ||
| } | ||
| } | ||
| } | ||
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| BitcoinEsploraSwapFindProvider.version = version |
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| import BitcoinEsploraSwapFindProvider from './BitcoinEsploraSwapFindProvider' | ||
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| export default BitcoinEsploraSwapFindProvider |
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packages/bitcoin-esplora-swap-find-provider/package-lock.json
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| { | ||
| "name": "@liquality/bitcoin-esplora-swap-find-provider", | ||
| "umdName": "BitcoinEsploraSwapFindProvider", | ||
| "umdExport": "default", | ||
| "version": "0.4.11", | ||
| "description": "", | ||
| "module": "lib/index.js", | ||
| "main": "dist/index.cjs.js", | ||
| "files": [ | ||
| "dist", | ||
| "lib" | ||
| ], | ||
| "scripts": { | ||
| "build:node": "webpack --config ../../webpack/webpack.node.config.js", | ||
| "build:browser": "webpack --config ../../webpack/webpack.browser.config.js", | ||
| "build": "webpack --config ../../webpack/webpack.config.js" | ||
| }, | ||
| "author": "Liquality <info@liquality.io>", | ||
| "license": "MIT", | ||
| "dependencies": { | ||
| "@babel/runtime": "^7.4.3", | ||
| "@liquality/provider": "^0.4.11", | ||
| "@liquality/utils": "^0.4.11", | ||
| "axios": "^0.19.0", | ||
| "bignumber.js": "^8.1.1", | ||
| "lodash": "^4.17.11" | ||
| }, | ||
| "engines": { | ||
| "node": "~8.12.0" | ||
| }, | ||
| "homepage": "https://github.com/liquality/chainabstractionlayer#readme", | ||
| "repository": { | ||
| "type": "git", | ||
| "url": "git+https://github.com/liquality/chainabstractionlayer.git" | ||
| }, | ||
| "bugs": { | ||
| "url": "https://github.com/liquality/chainabstractionlayer/issues" | ||
| }, | ||
| "publishConfig": { | ||
| "access": "public" | ||
| }, | ||
| "gitHead": "1855d9ec369c8c577f74eb04e310a7c00b9eaa6c", | ||
| "devDependencies": { | ||
| "nock": "^10.0.6" | ||
| } | ||
| } |
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