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DO NOT REVIEW - EXTCODESIZE #7

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DO NOT REVIEW - EXTCODESIZE #7

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11 changes: 9 additions & 2 deletions gas.md
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Original file line number Diff line number Diff line change
Expand Up @@ -784,9 +784,16 @@ of the logged registers.

* `BALANCE`
```hs
computationCost(BALANCE) = balanceCost
computationCost(existing-account, BALANCE) = balanceCost
computationCost(non-existing-account, BALANCE) = newAccountCost + balanceCost
estimatedResultSize(BALANCE) = balanceSize
```
* `EXTCODESIZE`
```hs
computationCost(existing-account, EXTCODESIZE) = extCodeSizeCost
computationCost(non-existing-account, EXTCODESIZE) = newAccountCost + extCodeSizeCost
estimatedResultSize(EXTCODESIZE) = extCodeSizeSize
```
* `SLOAD` In order to load the data from the storage, we first need to inspect
the metadata to make sure we have enough gas to load it. Hence, we will
compute some `preComputationCost`, after which we assume to have access to
Expand Down Expand Up @@ -877,10 +884,10 @@ Definitions
* Check that all background costs are accounted for (e.g. updating a register's)
metadata after an assignment.
* Check that memory deltas are used properly everywhere (e.g. MLOAD).
* Bill each use of #newAccount as using account storage space.

### TODOS: Instructions to add

* EXTCODESIZE
* CREATE
* SELFDESTRUCT
* COPYCREATE
Expand Down