Description

Implementation of EIP1559 eth_feeHistory into the new gasprice package
Example call:
curl http://localhost:10002/ -X POST -H "Content-Type: application/json" --data '{"method":"eth_feeHistory","params":[4, 5, [25, 75]],"id":1,"jsonrpc":"2.0"}'

Response:
{"jsonrpc":"2.0","id":1,"result":{"OldestBlock":"0x1","BaseFeePerGas":["0x34d670c0","0x2e3ba2a8","0x2e3ba2a8"],"GasUsedRatio":["0x0","0x0"],"Reward":[["0x0","0x0"],["0x0","0x0"]]}}

Changes include

• Bugfix (non-breaking change that solves an issue)
• Hotfix (change that solves an urgent issue, and requires immediate attention)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the relevant labels
• I have updated the official documentation
• I have added sufficient documentation in code

Testing

• I have tested this code with the official test suite
• I have tested this code manually