https://github.com/sambacha/txprice-web

txprice.com gas pricing for ethereum done correctly
https://github.com/sambacha/txprice-web

eth ethereum gas gwei solidity

Last synced: 9 days ago
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txprice.com gas pricing for ethereum done correctly

• Host: GitHub
• URL: https://github.com/sambacha/txprice-web
• Owner: sambacha
• Created: 2021-07-10T23:29:55.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2021-08-08T17:53:33.000Z (about 3 years ago)
• Last Synced: 2024-10-12T09:05:14.054Z (24 days ago)
• Topics: eth, ethereum, gas, gwei, solidity
• Language: Vue
• Homepage:
• Size: 1.57 MB
• Stars: 0
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# txprice-web

[![Better Uptime Badge](https://betteruptime.com/status-badges/v1/monitor/898s.svg)](https://betteruptime.com/?utm_source=status_badge)

```js

async function estimateGasPrice(provider: JsonRpcProvider): Promise {

  try {

    const network = await provider.getNetwork()

    if (network.name === 'homestead') {

      try {

        const response = await fetch('https://www.txprice.com/api')

        if (response.ok) {

          const { data } = await response.json()

          console.log(`gas price estimate for ${network.name}: ${utils.formatUnits(data.fast, 'gwei')}`)

          return data.fast

        }

      } catch (error) {

        console.error(`txprice api call failed`, error)

      }

    }

    const block = await provider.getBlockWithTransactions('latest')

    const block1 = await provider.getBlockWithTransactions(-1)

    const block2 = await provider.getBlockWithTransactions(-2)

    const transactions = [...block.transactions, ...block1.transactions, ...block2.transactions]

    const filteredTxList = transactions.filter((tx) => tx.gasPrice.gt(0)) // filter out miner stuff

    const gasPrices = filteredTxList.map((tx) => tx.gasPrice)

    const gasSum = gasPrices.reduce((acc, cur) => acc.add(cur), BigNumber.from(0))

    const divisor = gasPrices.length || 1

    const average = gasSum.div(divisor).mul(102).div(100) // 2% gas price buffer over average rate

    console.log(`gas price estimate for ${network.name}: ${utils.formatUnits(average, 'gwei')}`)

    return average || BigNumber.from(1)

  } catch (error) {

    console.error(`failed gas estimation: ${error}`)

    return BigNumber.from(1)

  }

}