Blockchain Archives - Page 3 of 4

Host your own PancakeSwap Testnet

July 17, 2021February 24, 2023nhancv7 Comments

Arbitrum Goerli Version: Pancakeswap/UniswapV2 Arbitrum Goerli Nitro Rollup Testnet —- https://github.com/nhancv/pancake-swap-testnet#readme Preparing source Clone pancake-swap-core Clone pancake-swap-periphery Clone pancake-swap-interface-v1 Setup Install contract merger: https://www.npmjs.com/package/sol-merger Prepare PancakeFactory and PancakeRouter Deploy PancakeFactory and PancakeRouter Access: https://remix.ethereum.org/#optimize=false&runs=200&evmVersion=null&version=soljson-v0.5.16+commit.9c3226ce.js Deploy WBNB New File: WBNB.sol => Copy…

Smart contract pagination for list

June 28, 2021June 28, 2021nhancv1 Comment

A contract has an infinite internal storage There are 2 limits to practicality: gas costs and the block gas limit. Example Create 5k5 players, read one time https://testnet.bscscan.com/address/0x721ff9e58831b698efd26b9ac744cf8f0aaecbc2#readContract Max Gas Limit is 28,500,000 at…

SmartContract ICO Crowdsale simple

May 5, 2021May 5, 2021nhancvLeave a Comment

Please read this post first: Issue your ERC20 token with Solidity on Ethereum Blockchain [https://medium.com/p/6e640eb613ff] Similar with ERC20 token, now let create a ICO Crowdsale with simple abstract: Start date…

Voting Application using Smart Contract

May 5, 2021May 5, 2021nhancvLeave a Comment

Please read some useful posts first: Issue your ERC20 token with Solidity on Ethereum Blockchain [https://medium.com/p/6e640eb613ff] SmartContract ICO Crowdsale simple [https://medium.com/p/35dc5ff02459] In this demo, I use web3 version 1.0.0-beta.33, solidity…

Issue your ERC20 token with Solidity on Ethereum Blockchain

May 5, 2021nhancv1 Comment

I created smart-contract follow ERC20 Standard to issue an awesome token. It’s easy. Let’s start. Preparing: Install Metamask: https://metamask.io/ Create new Eth account with Metamask on Ropsten Test Network Init some…

Staking strategy with a fair reward distribution.

April 4, 2021August 22, 2021nhancvLeave a Comment

The Stake event begins with fixed pool size and staking time. How to deal with fairy things? (1) The reward should be fixed at staking time and maybe grow up…

[cryptocurrencies] Deal with a pending transaction

March 2, 2021April 7, 2022nhancvLeave a Comment

The problem is caused by a too-small fee for that transaction. Bitcoin Way 1: Wait for over 48h (2–3 days) and that transaction will be rejected. 😀 Way 2: Re-broadcast your…

Create TRC20 Token on TRON network with nodejs

January 21, 2020January 30, 2021nhancv1 Comment

Create TRC10 Token on TRON network with nodejs About TRC20: https://developers.tron.network/docs/trc20 Create TRON wallet with browser extension Tronlink: https://chrome.google.com/webstore/detail/tronlink/ibnejdfjmmkpcnlpebklmnkoeoihofec Go to setting, update the environment to shasta Get some TRX for development: https://www.trongrid.io/faucet…

Create TRC10 Token on TRON network with nodejs

January 21, 2020January 21, 2020nhancvLeave a Comment

About TRC10: https://developers.tron.network/docs/trc10-token Create TRON wallet with browser extension Tronlink: https://chrome.google.com/webstore/detail/tronlink /ibnejdfjmmkpcnlpebklmnkoeoihofec Go to setting, update the environment to shasta Get some TRX for development: https://www.trongrid.io/faucet Install tronweb: https://developers.tron.network/docs/tron-web-intro TRONTokenClient.ts…

Generate new bitcoin wallet using bitcoinjs

November 24, 2019nhancvLeave a Comment

Install Source