Unable to complete Moonbeam transactions (Gas estimation fails)

[josheleonard]

Description

Reported via Brave community: https://community.brave.com/t/cannot-transfer-glmr-token-out-from-my-brave-wallet/379404

Steps to Reproduce

1. Create a Brave Wallet
2. Add Moonbeam via chainlist.org
3. Fund account with GLMR - faucet: https://glmr.supply/
4. Attempt to send GLMR

Actual result:

Confirmation panel never opens, console logs err=Failed to get the gas fees for EIP-1559 transaction

Expected result:

Confirmation panel opens, transaction completes after signing

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

1.39.120 Chromium: 102.0.5005.99 (Official Build) (arm64)
870f7bcc58dfa811cc68c2186439721385e086d0-refs/branch-heads/5005@{#1125}
OS | macOS Version 12.4 (Build 21F79)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[bbondy]

@onyb what do you think is the cause of this one?

[onyb]

It seems the blockCount parameter of eth_feeHistory no longer accepts an integer, and expects a hex-encoded string. See docs: https://ethereum.github.io/execution-apis/api-documentation

geth supports both integer and hex strings, but apparently Moonbeam does not:

curl -s https://rpc.ankr.com/moonbeam -X POST -H "Content-Type: application/json" -d '{"id":1,"jsonrpc":"2.0","method":"eth_feeHistory","params":[300, "latest", [20,50,80]]}' | jq      
{
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Invalid params: invalid type: integer `300`, expected a (both 0x-prefixed or not) hex string with length between (0; 64]."
  },
  "id": 1
}

Changing blockCount parameter to use 0x-prefixed hex string fixed the issue. I suggest we apply this change without making an exception for Moonbeam. @bbondy

[onyb]

Related geth fix here: ethereum/go-ethereum#23239, included in 1.10.7.

[bbondy]

sgtm!

[kjozwiak]

The above will require 1.41.96 or higher for 1.41.x verification.

[srirambv]

Brave	1.41.96 Chromium: 103.0.5060.114 (Official Build) (64-bit)
Revision	a1c2360c5b02a6d4d6ab33796ad8a268a6128226-refs/branch-heads/5060@{#1124}
OS	☑️ Linux	☑️ Windows 11 Version 21H2 (Build 22000.708)	☑️ macOS Version 12.0.1 (Build 21C52)
Verified steps from issue description Verified able to submit a send transaction for GLMR token on Moonbeam network Verified able to get a successful transaction notification
	23529-Linux.mp4	23529-Windows.mp4	23529-macOS.mov