Unstable Polygon gas station used without fallbacks #5019
Description
Ethers Version
6.15.0
Search Terms
polygon, plugins, gasstation
Describe the Problem
I've encountered an issue on Polygon Mainnet when getting fees before sending transaction. I initialize AlchemyProvider with own Alchemy key and chain id (as in code snippet below) and the error says that it failed when calling gasstation.polygon.technology which was not configured in my code and surprisingly is hardcoded inside ethers.js library itself. Calling gas station endpoint from multiple servers showed 200 empty response from multiple IPs and regions which for me proves that the endpoint is fragile.
Code Snippet
const provider = new ethers.AlchemyProvider(
137,
"<alchemy key>"
);
const feeData = await provider.getFeeData(); // breaksContract ABI
Issue does not involve any contract.Errors
Error: error encountered with polygon gas station ("https://gasstation.polygon.technology/v2") (request=
{}
, response=
{}
, error=
{
"code": "UNSUPPORTED_OPERATION",
"info": {
"response": {}
},
"operation": "bodyJson",
"shortMessage": "response body is not valid JSON"
}
, code=SERVER_ERROR, version=6.14.1)
at makeError (/var/task/index.js:86543:15)
at assert (/var/task/index.js:86556:11)
at FetchUrlFeeDataNetworkPlugin.<anonymous> (/var/task/index.js:101989:7)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async _AlchemyProvider.getFeeData (/var/task/index.js:102883:23)
*** {
code: 'SERVER_ERROR',
request: _FetchRequest {},
response: _FetchResponse {},
error: Error: response body is not valid JSON (operation="bodyJson", info={ "response": { } }, code=UNSUPPORTED_OPERATION, version=6.14.1)
at makeError (/var/task/index.js:86543:15)
at assert (/var/task/index.js:86556:11)
at get bodyJson [as bodyJson] (/var/task/index.js:87857:7)
at FetchUrlFeeDataNetworkPlugin.<anonymous> (/var/task/index.js:101981:32)
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
at async _AlchemyProvider.getFeeData (/var/task/index.js:102883:23)
*** {
code: 'UNSUPPORTED_OPERATION',
operation: 'bodyJson',
info: { response: _FetchResponse {} },
shortMessage: 'response body is not valid JSON'
},
shortMessage: 'error encountered with polygon gas station ("https://gasstation.polygon.technology/v2")'
}Environment
node.js (v12 or newer)
Environment (Other)
No response