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api.js
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177 lines (165 loc) · 5.64 KB
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/* @flow */
'use strict' // eslint-disable-line strict
/* eslint-disable max-len */
// Enable core-js polyfills. This allows use of ES6/7 extensions listed here:
// https://github.com/zloirock/core-js/blob/fb0890f32dabe8d4d88a4350d1b268446127132e/shim.js#L1-L103
/* eslint-enable max-len */
// In node.js env, polyfill might be already loaded (from any npm package),
// that's why we do this check.
// if(!wx){
// if (!global._babelPolyfill) {
// require('babel-polyfill')
// }
// }
const _ = require('lodash')
const EventEmitter = require('events').EventEmitter
const common = require('./common')
const server = require('./server/server')
const connect = server.connect
const disconnect = server.disconnect
const getServerInfo = server.getServerInfo
const getFee = server.getFee
const isConnected = server.isConnected
const getLedgerVersion = server.getLedgerVersion
const getTransaction = require('./ledger/transaction')
const getTransactions = require('./ledger/transactions')
const getContractTransactions = require('./ledger/contractTransactions')
const getTrustlines = require('./ledger/trustlines')
const getBalances = require('./ledger/balances')
const getBalanceSheet = require('./ledger/balance-sheet')
const getPaths = require('./ledger/pathfind')
const getOrders = require('./ledger/orders')
const getOrderbook = require('./ledger/orderbook')
const getSettings = require('./ledger/settings')
const getAccountInfo = require('./ledger/accountinfo')
const getPaymentChannel = require('./ledger/payment-channel')
const preparePayment = require('./transaction/payment')
const prepareTrustline = require('./transaction/trustline')
const prepareOrder = require('./transaction/order')
const prepareOrderCancellation = require('./transaction/ordercancellation')
const prepareEscrowCreation =
require('./transaction/escrow-creation')
const prepareEscrowExecution =
require('./transaction/escrow-execution')
const prepareEscrowCancellation =
require('./transaction/escrow-cancellation')
const preparePaymentChannelCreate =
require('./transaction/payment-channel-create')
const preparePaymentChannelFund =
require('./transaction/payment-channel-fund')
const preparePaymentChannelClaim =
require('./transaction/payment-channel-claim')
const prepareSettings = require('./transaction/settings')
const sign = require('./transaction/sign')
const combine = require('./transaction/combine')
const submit = require('./transaction/submit')
const errors = require('./common').errors
const generateAddress =
require('./offline/generate-address').generateAddressAPI
const computeLedgerHash = require('./offline/ledgerhash')
const signPaymentChannelClaim =
require('./offline/sign-payment-channel-claim')
const verifyPaymentChannelClaim =
require('./offline/verify-payment-channel-claim')
const getLedger = require('./ledger/ledger')
type APIOptions = {
server?: string,
feeCushion?: number,
trace?: boolean,
proxy?: string,
timeout?: number
}
// prevent access to non-validated ledger versions
class RestrictedConnection extends common.Connection {
request(request, timeout) {
const ledger_index = request.ledger_index
if (ledger_index !== undefined && ledger_index !== 'validated') {
if (!_.isNumber(ledger_index) || ledger_index > this._ledgerVersion) {
return Promise.reject(new errors.LedgerVersionError(
`ledgerVersion ${ledger_index} is greater than server\'s ` +
`most recent validated ledger: ${this._ledgerVersion}`))
}
}
return super.request(request, timeout)
}
}
class ChainsqlAPI extends EventEmitter {
constructor(options: APIOptions = {}) {
common.validate.apiOptions(options)
super()
this._feeCushion = options.feeCushion || 1.2
const serverURL = options.server
if (serverURL !== undefined) {
this.connection = new RestrictedConnection(serverURL, options)
this.connection.on('ledgerClosed', message => {
this.emit('ledger', server.formatLedgerClose(message))
})
this.connection.on('error', (errorCode, errorMessage, data) => {
this.emit('error', errorCode, errorMessage, data)
})
this.connection.on('connected', () => {
this.emit('connected')
})
this.connection.on('disconnected', code => {
this.emit('disconnected', code)
})
this.on('error',function (errorCode, errorMessage, data) {
console.error('error',errorCode, errorMessage, data);
});
} else {
// use null object pattern to provide better error message if user
// tries to call a method that requires a connection
this.connection = new RestrictedConnection(null, options)
}
}
}
_.assign(ChainsqlAPI.prototype, {
connect,
disconnect,
isConnected,
getServerInfo,
getFee,
getLedgerVersion,
getTransaction,
getTransactions,
getContractTransactions,
getTrustlines,
getBalances,
getBalanceSheet,
getPaths,
getOrders,
getOrderbook,
getSettings,
getAccountInfo,
getPaymentChannel,
getLedger,
preparePayment,
prepareTrustline,
prepareOrder,
prepareOrderCancellation,
prepareEscrowCreation,
prepareEscrowExecution,
prepareEscrowCancellation,
preparePaymentChannelCreate,
preparePaymentChannelFund,
preparePaymentChannelClaim,
prepareSettings,
sign,
combine,
submit,
generateAddress,
computeLedgerHash,
signPaymentChannelClaim,
verifyPaymentChannelClaim,
errors
})
// these are exposed only for use by unit tests; they are not part of the API
ChainsqlAPI._PRIVATE = {
validate: common.validate,
RangeSet: require('./common/rangeset').RangeSet,
ledgerUtils: require('./ledger/utils'),
schemaValidator: require('./common/schema-validator')
}
module.exports = {
ChainsqlAPI
}