Handlers for rpc-over-ws that verify an IAP with Apple or Google and manage a user's coin balance in Redis.
Installation
npm i --save rpc-virtual-bank
Usage
const Redis = require('ioredis')
const redis = new Redis(process.env.REDIS_URL)
const vbank = require('rpc-virtual-bank')({
redis,
products: {
'com.foobar.product1': 100,
'com.foobar.product2': 1000,
...
},
freeCoinsAmt: 100,
freeCoinsAfter: 3600,
upgradeRedeemCoins: 2500
})
require('rpc-over-ws')({
getProductIds: vbank.getProductIds,
verifyIAP: vbank.verifyIAP,
getCoinStatus: vbank.getCoinStatus,
collectFreeCoins: vbank.collectFreeCoins,
didPreviouslyUpgrade: vbank.didPreviouslyUpgrade,
debit: vbank.debit,
})
API
require('rpc-virtual-bank')(options)
options
redis: instance of ioredis.Redis
products: keys are product ids; values are number of coins associated
freeCoinsAmt: number of "free coins" to give out
freeCoinsAfter: how long a user has to wait since the last time
they collected free coins before they may collect free coins again
verifyIAP({ platform, receipt }) -> Promise<{ balance: int }>
getCoinStatus() -> Promise<{ balance: int, nextFreeCoinsAt: int }>
collectFreeCoins() -> Promise<{ balance: int, nextFreeCoinsAt: int }>
Common error: 'too soon'.
debit({ amt: int }) -> Promise<{ balance: int }>
Common error: 'out of coins'.
A user's coin balance may not become negative.
Events
vbank.emitter.on('iap-rejected', (client, platform, receipt, error) => {
})
vbank.emitter.on('iap-verified', (client, platform, productId, coinsPurchased) => {
})
vbank.emitter.on('free-coins-collected', client => {
})
vbank.emitter.on('free-coins-error', (client, error) => {
})
vbank.emitter.on('debit', (client, amt) => {
})
vbank.emitter.on('debit-error', (client, amt, error) => {
})