Please support skipFetchSetup for BscscanProvider and EtherscanProvider

[tyuen]

Ethers Version

5.6.8

Search Terms

cloudflare

Describe the Problem

I'm trying to connect to Binance Mainnet inside a Cloudflare Worker and need the skipFetchSetup: true flag (introduced in #1886), but it is only available for JsonRpcProvider and not BscscanProvider.

Without the flag, fetch doesn't work inside Cloudflare. I have simulated a request using BscscanProvider by hardcoding the skipFetchSetup flag and it works.

The standard Binance Mainnet endpoint is not working (getting HTTP 403 errors) with JsonRpcProvider. I suspect Binance is throttling requests from Cloudflare Worker IPs. Binance Testnet does work with JsonRpcProvider however.

I suppose EtherscanProvider would also benefit from the same flag.

Code Snippet

let p = new BscscanProvider(56, "<your BscScan api key>");
await p.getBalance(addr);  //errors

Contract ABI

No response

Errors

No response

Environment

Other (please specify)

Environment (Other)

Cloudflare Worker

[0xcaff]

I've worked around this by patching post build. This is kinda sketch and breaks if you turn on minification. You could also use patch-package but seems like there's like 20 prebuilt modules in the node_modules for ethers

sed -i '' 's/options.skipFetchSetup !== true/false/g' dist/worker.js

[zer0stars]

Having this issue with ethers 6.3, but now with "Script startup exceeded CPU time limit". Skipping provider setup and falling back to regular fetch() causes everything to work.

How is options.skipFetchSetup enabled in 6.3?

[ricmoo]

@zer0stars

There is no such thing as skipFetchSetup in v6, since it doesn't do any setup like v5 did.

What do you mean by "skipping provider setup and falling back to regular fetch"?

(closing this now, as it is no longer relevant to v6, but please keep commenting if you are having issues ;))