Initial nonce of created contract

[iamyulong]

Based on EIP-161

Account creation transactions and the CREATE operation SHALL, prior to the execution of the initialisation code, increment the nonce over and above its normal starting value by one.

However, in FastVM only the CREATE opcode case is covered; new accounts created by creation transactions will have an initial nonce of zero.

This should not affect normal solidity usage (contract with empty code is less common), but may end up with storage changes rollback for some edge cases. In the following example, the storage changes will be discarded because the newly created account is considered as empty.

{
  "name": "stack_push",
  "description": "can push items to stack",
  "transactions": [
    {
      "type": "CREATE",
      "receiver": "",
      "value": "0",
      "data": {
        "raw": "7f000000000000000000000000000000010000000000000000000000000000000255"
      },
      "nrg": "1000000"
    }
  ]
}

https://github.com/aionnetwork/aion/blob/843761824132b2dfe2a6e8dbc5b755167f571718/modAion/src/org/aion/zero/db/AionRepositoryCache.java#L64-L74