Lecky Lao leckylao

🎯

Focusing

Challenge Enthusiast. #defi #blockchain #staking engineer. @swellnetworkio cofounder - external advisor, proDigital LP, @1inch OpenDAOResolver

leckylao / Postgres back up and restore

Created March 27, 2022 07:55

Postgres back up and restore

	Backup
	`docker exec backend_postgres_1 pg_dump -U swell -W swellnetwork > backup.sql `

	Restore:
	`docker exec backend_postgres_1 psql -U swell -W swellnetwork < backup.sql `

leckylao / settings.json

Created June 8, 2021 14:45

vscode settings

	{
	"slither.solcPath": "",
	"slither.hiddenDetectors": [],
	"solidity.compileUsingRemoteVersion": "v0.6.12+commit.27d51765",
	"solidity.nodemodulespackage": "@eth-optimism/solc"
	}

leckylao / save.js

Last active September 6, 2020 05:56

instadapp save

	let borrowAmount = 3880;
	let borrowAmtInWei = dsa.tokens.fromDecimal(borrowAmount, "usdc"); // borrow flash loan and swap via OasisDEX

	console.log("borrowAmtInWei: ", borrowAmtInWei)

	let position = await dsa.compound.getPosition();
	let wbtcDebtAmount = position.wbtc.borrow;
	let wbtcDebtAmtInWei = dsa.tokens.fromDecimal(wbtcDebtAmount, "wbtc");
	console.log("wbtcDebtAmount: ", wbtcDebtAmount)

leckylao / subArray.js

Last active August 1, 2020 05:41

subArray.js

	function printSubsequences(arr, index, subarr)
	{
	// Print the subsequence when reach
	// the leaf of recursion tree
	if (index === arr.length)
	{
	// Condition to avoid printing
	// empty subsequence
	if (subarr.length != 0)
	console.log(subarr);

leckylao / getSubArraysOfSum.js

Created August 1, 2020 04:21 — forked from mo7amd/getSubArraysOfSum.js

Get all sub-arrays of array arr[] with sum k

	/*
	References:
	==============

	1: HTTPS://WWW.QUORA.COM/WHAT-IS-THE-RECURSIVE-SOLUTION-FOR-FINDING-ALL-SUBSETS-OF-A-GIVEN-ARRAY

	2: HTTPS://WWW.IDESERVE.CO.IN/LEARN/GENERATE-ALL-SUBSETS-OF-A-SET-RECURSION
	hellow world from emacs
	*/

leckylao / short_dai.js

Last active July 29, 2020 18:52

short dai

	await dsa.setInstance(dsa.instance.id);

	let borrowAmount = 10000; // 10000 DAI
	let borrowAmtInWei = dsa.tokens.fromDecimal(borrowAmount, "dai"); // borrow flash loan and swap via OasisDEX

	let position = await dsa.compound.getPosition();
	let debtAmount = position.wbtc.borrow;
	let debtAmtInWei = dsa.tokens.fromDecimal(debtAmount, "wbtc"); // borrow flash loan and swap via OasisDEX

	let slippage = 0.5; // 0.5% slippage.

leckylao / lending_swap.js

Last active February 21, 2021 09:12

	await dsa.setInstance(237);

	let withdrawAmount = 1000;
	let withdrawAmtInWei = dsa.tokens.fromDecimal(withdrawAmount, "bat");

	let slippage = 0.1; // 0.1% slippage.
	let bat_address = dsa.tokens.info.bat.address
	let usdc_address = dsa.tokens.info.usdc.address

	let buyAmount = await dsa.kyber.getBuyAmount("USDC", "BAT", withdrawAmount, slippage);

leckylao / instadapp.js

Last active September 9, 2020 12:07

instadapp

	async function oneInchSwapQuote(fromToken, toToken, dsa){
	const oneInchSwapQuote = await (await fetch(`https://api.1inch.exchange/v1.1/swapQuote?fromTokenSymbol=${fromToken.symbol}&toTokenSymbol=${toToken.symbol}&amount=${fromToken.balance.toString()}&fromAddress=${dsa.instance.address}&slippage=1&disableEstimate=true`)).json();
	console.log(`Estimate exchange: ${oneInchSwapQuote.toTokenAmount / (10 ** toToken.decimals)}`)
	return oneInchSwapQuote;
	}

	// Set DSA instance
	await dsa.setInstance((await dsa.getAccounts())[0].id);

	// Set up tokens

leckylao / mysql-docker.sh

Created September 11, 2017 10:32 — forked from spalladino/mysql-docker.sh

Backup and restore a mysql database from a running Docker mysql container

	# Backup
	docker exec CONTAINER /usr/bin/mysqldump -u root --password=root DATABASE > backup.sql

	# Restore
	cat backup.sql \| docker exec -i CONTAINER /usr/bin/mysql -u root --password=root DATABASE

leckylao / Permission problems with SSH

Last active August 29, 2015 14:06

Permission problems with SSH

	Ssh is very picky about permissions on the ~/.ssh directory and files. Sometimes you may do something to mess up these permissions. Run the following to fix most permissions problems. You may have to do this on both the remote host and local host.

	SSH will not work correctly and will send warnings to the log facilities if any variation of g+w or o+wexists on the $HOME directory

	chmod 700 ~/.ssh
	chmod 600 ~/.ssh/id_rsa
	chmod 644 ~/.ssh/id_rsa.pub
	chmod 644 ~/.ssh/authorized_keys
	chmod 644 ~/.ssh/known_hosts