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import { ZeroEx } from '0x.js';
import { BigNumber, logUtils, promisify } from '@0xproject/utils';
import * as _ from 'lodash';
import * as Web3 from 'web3';
import { configs } from './configs';
const DISPENSE_AMOUNT_ETHER = 0.1;
const DISPENSE_AMOUNT_TOKEN = 0.1;
const DISPENSE_MAX_AMOUNT_TOKEN = 2;
const DISPENSE_MAX_AMOUNT_ETHER = 2;
type AsyncTask = () => Promise<void>;
export const dispenseAssetTasks = {
dispenseEtherTask(recipientAddress: string, web3: Web3): AsyncTask {
return async () => {
logUtils.log(`Processing ETH ${recipientAddress}`);
const userBalance = await promisify<BigNumber>(web3.eth.getBalance)(recipientAddress);
const maxAmountInWei = new BigNumber(web3.toWei(DISPENSE_MAX_AMOUNT_ETHER, 'ether'));
if (userBalance.greaterThanOrEqualTo(maxAmountInWei)) {
logUtils.log(
`User exceeded ETH balance maximum (${maxAmountInWei}) ${recipientAddress} ${userBalance} `,
);
return;
}
const sendTransactionAsync = promisify(web3.eth.sendTransaction);
const txHash = await sendTransactionAsync({
from: configs.DISPENSER_ADDRESS,
to: recipientAddress,
value: web3.toWei(DISPENSE_AMOUNT_ETHER, 'ether'),
});
logUtils.log(`Sent ${DISPENSE_AMOUNT_ETHER} ETH to ${recipientAddress} tx: ${txHash}`);
};
},
dispenseTokenTask(recipientAddress: string, tokenSymbol: string, zeroEx: ZeroEx): AsyncTask {
return async () => {
logUtils.log(`Processing ${tokenSymbol} ${recipientAddress}`);
const amountToDispense = new BigNumber(DISPENSE_AMOUNT_TOKEN);
const token = await zeroEx.tokenRegistry.getTokenBySymbolIfExistsAsync(tokenSymbol);
if (_.isUndefined(token)) {
throw new Error(`Unsupported asset type: ${tokenSymbol}`);
}
const baseUnitAmount = ZeroEx.toBaseUnitAmount(amountToDispense, token.decimals);
const userBalanceBaseUnits = await zeroEx.token.getBalanceAsync(token.address, recipientAddress);
const maxAmountBaseUnits = ZeroEx.toBaseUnitAmount(
new BigNumber(DISPENSE_MAX_AMOUNT_TOKEN),
token.decimals,
);
if (userBalanceBaseUnits.greaterThanOrEqualTo(maxAmountBaseUnits)) {
logUtils.log(
`User exceeded token balance maximum (${maxAmountBaseUnits}) ${recipientAddress} ${userBalanceBaseUnits} `,
);
return;
}
const txHash = await zeroEx.token.transferAsync(
token.address,
configs.DISPENSER_ADDRESS,
recipientAddress,
baseUnitAmount,
);
logUtils.log(`Sent ${amountToDispense} ZRX to ${recipientAddress} tx: ${txHash}`);
};
},
};
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