How to get latest eth price in solidity smart contract

[imcrazysteven]

Hi @Mates

Recently I am working on the development of ICO presale website and writing smart contract for that.
I need to implement "Buy token with ETH", then I need to calculate eth price in smart contract.

Please let me know if you have any experience with that.
Thanks

[luckypenny1632333]

Hi @stevendev0822

To get latest eth price, you need to use Uniswap v2 router or chainlink oracle contract.
Plz check the Uniswap document , and/or Chainlink

Hope you finds it helpful.
Thanks

[marksantiago290]

Hi @stevendev0822

Recently I have found very useful api for getting native token price in usd, - gmgm.ai api.

https://gmgn.ai/api/v1/gas_price/{chain}
You can get ETH, BSC, SOL, Base, Tron price in usd.
parameters are eth, base, bsc, sol, tron.

For example if you wanna get eth price, you can call https://gmgn.ai/api/v1/gas_price/eth

The response is as following:

{
  "code": 0,
  "reason": "",
  "message": "success",
  "data": {
    "auto": "",
    "auto_mev": "",
    "last_block": 22573193,
    "high": "5676550458",
    "average": "4141240366",
    "low": "2962803669",
    "suggest_base_fee": "3784366972",
    "high_prio_fee": "1000000020",
    "average_prio_fee": "500000015",
    "low_prio_fee": "10",
    "high_prio_fee_mixed": "20",
    "average_prio_fee_mixed": "500000015",
    "low_prio_fee_mixed": "10",
    "native_token_usd_price": 2632.26,
    "eth_usd_price": 2632.26,
    "high_estimate_time": 15,
    "average_estimate_time": 30,
    "low_estimate_time": 30,
    "high_orign": "1784366982",
    "average_orign": "1784366972",
    "low_orign": "1784366972"
  }
}

Here you can get "native_token_usd_price"

This also would be good and fast enough.
Thanks