monero-wallet-rpc-js/main.js

const axios = require('axios')

module.exports = class Wallet {
	constructor (settings) {
		this.url = settings.url

		// Open wallet
		try {
			this.rpc('open_wallet', {
				filename: settings.filename,
				password: settings.password,
			})
		} catch (openErr) {

			// Create wallet
			try {
				this.rpc('generate_from_keys', {
					restore_height: settings.restoreHeight,
					filename: settings.filename,
					address: settings.address,
					spendKey: settings.spendKey,
					viewKey: settings.viewKey,
					password: settings.password
				})
			} catch (createErr) {
				console.error(`Failed to open wallet "${settings.filename}": ${openErr}`)
				console.error(`Failed to create wallet "${settings.filename}": ${createErr}`)
			}

		}

		// Refresh wallet
		try {
			this.rpc('refresh', {
				start_height: settings.restoreHeight || 0,
			})
		} catch (err) {
			console.error(`Failed to refresh wallet: ${err}`)
		}
		
	}

	// Arbitrary RPC call
	async rpc(method, params=undefined) {
		const res = await axios.post(`${this.url}/json_rpc`, {
			jsonrpc: '2.0',
			id: '0',
			method: method,
			params: params,
		})
		if (res.status!==200)
			throw new Error(res.statusText)
		else if (res.data.error)
			throw new Error(res.data.error.message)
		else if (!res.data.result)
			throw new Error('No result')
		else return res.data.result
	}

	// Get wallet synced height
	async getHeight() {
		return Number((await this.rpc('get_height')).height)
	}
	// Get wallet balance
	async getBalance() {
		return Number((await this.rpc('get_balance')))
	}
	// Save wallet
	async store() {
		return await this.rpc('store')
	}
	// Save and close wallet
	async close() {
		return await this.rpc('close_wallet')
	}

}