Blockchain introduction
0 likes147 views
The document outlines the process of using MetaMask to send a transaction involving the Creeptoma token, including interactions with Infura for node selection and transaction execution. It details querying smart contract methods to obtain the Creeptoma price and discusses gas fees in relation to Ethereum transactions. Additionally, it presents a function for estimating gas costs in USD based on current prices.
Related topics:1 of 9
Download to read offline
More Related Content
What's hot (16)
Ad
Similar to Blockchain introduction (11)
Ad
More from Thao Huynh Quang (15)
Blockchain introduction
- 1. Login to Metamask Send transaction (buy creeptoma) Call infura service (currently free) Select one node + execute transaction/query Choose one node execute transaction/query Send query directly to infura (without login. i.e: get creeptoma price) Send directly to one node MainNet Blockchain TestNet Blockchain
- 3. contract Creeptoma { function int getCreeptomaPrice(){} } Deploy - directly to one node - through infura 0x3cd9498845833058e48fde… Creetoma.getCreeptomaPrice() Call method of smart contract Local Blockchain TestNet Blockchain (8GB) MainNet Blockchain (>1TB)
- 5. 20,000 gas 3$/ 1gas 1$/ 1gas 3$/ 1gas : gas price 20,000: gas used // Estimate: // Gas price: 1 gas = 10 Gwei // 1 Ether = 650$ // return a string export function estimateGasToUSD(gas) { return gweiToEther(gas * 10 * 750) + '$'; }
- 8. On Chain vs Off Chain Solution