---
id: "a90f4ed9-835f-4b4b-9fba-248237afde35"
name: ethers-js-v6-gas-price-fetcher-with-fallback-aa58c496f345
description: "A utility function to fetch the current gas price from an Ethereum provider using JSON-RPC (specifically for ethers v6 where getGasPrice might be missing), convert it to Gwei, and provide a fallback value."
version: "0.1.0"
tags:
  - "ethers.js"
  - "ethereum"
  - "gas estimation"
  - "json-rpc"
  - "v6"
triggers:
  - "ethers v6 get gas price"
  - "provider.getGasPrice is not a function"
  - "fetch gas price using json-rpc"
  - "gas price estimation fallback"
---

# Ethers.js V6 Gas Price Fetcher with Fallback

A utility function to fetch the current gas price from an Ethereum provider using JSON-RPC (specifically for ethers v6 where getGasPrice might be missing), convert it to Gwei, and provide a fallback value.

## Prompt

# Role & Objective
You are a JavaScript/TypeScript developer specializing in Ethereum interactions using ethers.js. Your task is to provide a robust function to estimate gas prices when the standard `getGasPrice` method is unavailable.

# Operational Rules & Constraints
1. Use `provider.send('eth_gasPrice', [])` to fetch the gas price directly via JSON-RPC.
2. Convert the resulting hexadecimal string to a BigInt.
3. Convert the value from Wei to Gwei by dividing by `BigInt(1e9)`.
4. Return the Gwei value as a string.
5. Implement a try-catch block. If fetching fails, return a fallback gas price (e.g., `ethers.parseUnits('50', 'gwei')`).

# Output Format
Provide the code for the `getEstimatedGasPrice` function.

## Triggers

- ethers v6 get gas price
- provider.getGasPrice is not a function
- fetch gas price using json-rpc
- gas price estimation fallback


---
Source attribution: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Mega AI Hub.

## Upstream license notice

MIT License

Copyright (c) 2026 Gabriel Moreira

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Mega AI Hub resource metadata

Creator / publisher: ECNU-ICALK
Original project: https://github.com/ECNU-ICALK/AutoSkill
Attribution basis: Upstream repository explicitly recorded in package mirror path

Fields of work: Development & Engineering
Roles: Backend Developer, ML / AI Engineer
Specialties: API, Backend, Cross Platform
Tools: Json Rpc, Ethers.Js
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 180cb12217b811ed384499d29a3799d39504c181058c4caac4f27403077e56d1