Description

When call eth_estimateGas to estimate gas used, the gas calculation for create-tx, call-tx and tx.data are incorrect and duplicated.

For Example

• Do simplest transfer transaction.

  Data Size1	Estimated in Axon	Actual in Axon	Estimated in Geth	Actual in Geth
  0	42000	21000	21000	21000
  1	42084	21016	21016	21016
  2	42168	21032	21032	21032

Appendix: More Unit Tests are Required

• Call eth_estimateGas for a transaction whose gas is set to a value that greater than u64::MAX, will cause Axon panic.

  axon/core/api/src/adapter.rs

  Line 210 in f692b86

  .map(|gas| gas.as_u64())

  There is already an in-process PR.

  I just record it here, and request a unit test for it, after that PR merged.