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Errata: EIP-2200 change variable name SLOAD_GAS to SSTORE_DIRTY_GAS #2526

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Errata: EIP-2200 change variable name SLOAD_GAS to SSTORE_DIRTY_GAS #2526

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18 changes: 9 additions & 9 deletions EIPS/eip-2200.md
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Original file line number Diff line number Diff line change
Expand Up @@ -56,11 +56,11 @@ changes in the future.

## Specification

Define variables `SLOAD_GAS`, `SSTORE_SET_GAS`, `SSTORE_RESET_GAS` and
Define variables `SSTORE_DIRTY_GAS`, `SSTORE_SET_GAS`, `SSTORE_RESET_GAS` and
`SSTORE_CLEARS_SCHEDULE`. The old and new values for those variables
are:

* `SLOAD_GAS`: changed from `200` to `800`.
* `SSTORE_DIRTY_GAS`: changed from `200` to `800`.
* `SSTORE_SET_GAS`: `20000`, not changed.
* `SSTORE_RESET_GAS`: `5000`, not changed.
* `SSTORE_CLEARS_SCHEDULE`: `15000`, not changed.
Expand All @@ -75,7 +75,7 @@ the following logic:

* If *gasleft* is less than or equal to gas stipend, fail the current
call frame with 'out of gas' exception.
* If *current value* equals *new value* (this is a no-op), `SLOAD_GAS`
* If *current value* equals *new value* (this is a no-op), `SSTORE_DIRTY_GAS`
is deducted.
* If *current value* does not equal *new value*
* If *original value* equals *current value* (this storage slot has
Expand All @@ -84,7 +84,7 @@ the following logic:
* Otherwise, `SSTORE_RESET_GAS` gas is deducted. If *new value* is
0, add `SSTORE_CLEARS_SCHEDULE` gas to refund counter.
* If *original value* does not equal *current value* (this storage
slot is dirty), `SLOAD_GAS` gas is deducted. Apply both of the
slot is dirty), `SSTORE_DIRTY_GAS` gas is deducted. Apply both of the
following clauses.
* If *original value* is not 0
* If *current value* is 0 (also means that *new value* is not
Expand All @@ -94,9 +94,9 @@ the following logic:
0), add `SSTORE_CLEARS_SCHEDULE` gas to refund counter.
* If *original value* equals *new value* (this storage slot is
reset)
* If *original value* is 0, add `SSTORE_SET_GAS - SLOAD_GAS` to
* If *original value* is 0, add `SSTORE_SET_GAS - SSTORE_DIRTY_GAS` to
refund counter.
* Otherwise, add `SSTORE_RESET_GAS - SLOAD_GAS` gas to refund
* Otherwise, add `SSTORE_RESET_GAS - SSTORE_DIRTY_GAS` gas to refund
counter.

An implementation should also note that with the above definition, if
Expand Down Expand Up @@ -138,7 +138,7 @@ properties that this EIP satisfies.
its original value, and then changed again, EIP-1283 would move more
gases to refund counter compared with EIP-1087.

Examine examples provided in EIP-1087's Motivation (with `SLOAD_GAS` being
Examine examples provided in EIP-1087's Motivation (with `SSTORE_DIRTY_GAS` being
`200`):

* If a contract with empty storage sets slot 0 to 1, then back to 0,
Expand Down Expand Up @@ -223,8 +223,8 @@ operations on a storage slot. For states discussed below, refer to
*State Transition* in *Explanation* section.

Below we do the proof under the assumption that all parameters are
unchanged, meaning `SLOAD_GAS` is `200`. However, note that the proof
still applies no matter how `SLOAD_GAS` is changed.
unchanged, meaning `SSTORE_DIRTY_GAS` is `200`. However, note that the proof
still applies no matter how `SSTORE_DIRTY_GAS` is changed.

### Original Value Being Zero

Expand Down