From 84f8c0cc1fbe1ab9c128555392a82ba609820fef Mon Sep 17 00:00:00 2001 From: kiel barry Date: Tue, 29 May 2018 03:42:21 -0700 Subject: common: improve documentation comments (#16701) This commit adds many comments and removes unused code. It also removes the EmptyHash function, which had some uses but was silly. --- core/vm/gas_table.go | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'core/vm') diff --git a/core/vm/gas_table.go b/core/vm/gas_table.go index 83adba428..0764c67a4 100644 --- a/core/vm/gas_table.go +++ b/core/vm/gas_table.go @@ -124,12 +124,12 @@ func gasSStore(gt params.GasTable, evm *EVM, contract *Contract, stack *Stack, m // 1. From a zero-value address to a non-zero value (NEW VALUE) // 2. From a non-zero value address to a zero-value address (DELETE) // 3. From a non-zero to a non-zero (CHANGE) - if common.EmptyHash(val) && !common.EmptyHash(common.BigToHash(y)) { + if val == (common.Hash{}) && y.Sign() != 0 { // 0 => non 0 return params.SstoreSetGas, nil - } else if !common.EmptyHash(val) && common.EmptyHash(common.BigToHash(y)) { + } else if val != (common.Hash{}) && y.Sign() == 0 { + // non 0 => 0 evm.StateDB.AddRefund(params.SstoreRefundGas) - return params.SstoreClearGas, nil } else { // non 0 => non 0 (or 0 => 0) -- cgit v1.2.3