kava.js

"use strict";
const conf = require('ocore/conf.js');
const EvmChain = require('./evm-chain.js');
const { getProvider } = require("./evm/provider.js");
const { getAddressBlocks } = require("./etherscan.js");

const etherscan_base_url = process.env.testnet ? 'https://testnet.explorer.kavalabs.io' : 'https://explorer.kavalabs.io';

let bCreated = false;

class Kava extends EvmChain {

	constructor() {
		if (bCreated)
			throw Error("Kava class already created, must be a singleton");
		bCreated = true;
		
		const provider = getProvider('Kava');
		super('Kava', conf.kava_factory_contract_addresses, conf.kava_assistant_factory_contract_addresses, provider);
	}

	forget() {
		console.log(`removing ${this.getProvider().listenerCount()} listeners on ${this.network}`);
		this.getProvider().removeAllListeners();
		bCreated = false;
	}

	getNativeSymbol() {
		return 'KAVA';
	}

	getMaxBlockRange() {
		return 10000;
	}

	getStaticGasPrice() {
		return 1; // in gwei
	}

	async getAddressBlocks(address, startblock, startts) {
		return await getAddressBlocks({
			base_url: etherscan_base_url,
			address,
			startblock,
			startts,
			getUrl: (type, params) => {
				if (type === 'account-history') {
					const { address, bInternal, startblock } = params;
					return `https://apis.mintscan.io/v1/evm/kava/account/${bInternal ? 'internal-tx' : 'tx'}?address=${address}&start_block=${startblock}&offset=1000`;
				}
				else if (type === 'block-by-ts') {
					const ts = params;
					return `https://apis.mintscan.io/v1/evm/kava/block/number-by-timestamp?timestamp=${ts}&closest=after`;
				}
				else
					throw Error(`unknown type: ${type}`);
			},
			getOptions: () => ({
				headers: {
					Accept: 'application/json',
					'Content-Type': 'application/json',
					Authorization: `Bearer ${conf.kava_api_key}`,
				},
			}),
		 });
	}

}

module.exports = Kava;