core, core/vm: added gas price variance table

This implements 1b & 1c of EIP150 by adding a new GasTable which must be
returned from the RuleSet config method. This table is used to determine
the gas prices for the current epoch.

Please note that when the CreateBySuicide gas price is set it is assumed
that we're in the new epoch phase.

In addition this PR will serve as temporary basis while refactorisation
in being done in the EVM64 PR, which will substentially overhaul the gas
price code.

1 files changed, 4 insertions, 0 deletions

diff --git a/cmd/evm/main.go b/cmd/evm/main.go
index 22707c1cc..9ca761b7b 100644
--- a/cmd/evm/main.go
+++ b/cmd/evm/main.go
@@ -33,6 +33,7 @@ import (
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/logger/glog"
+	"github.com/ethereum/go-ethereum/params"
 	"gopkg.in/urfave/cli.v1"
 )
 
@@ -226,6 +227,9 @@ func NewEnv(state *state.StateDB, transactor common.Address, value *big.Int, cfg
 type ruleSet struct{}
 
 func (ruleSet) IsHomestead(*big.Int) bool { return true }
+func (ruleSet) GasTable(*big.Int) params.GasTable {
+	return params.GasTableHomesteadGasRepriceFork
+}
 
 func (self *VMEnv) RuleSet() vm.RuleSet       { return ruleSet{} }
 func (self *VMEnv) Vm() vm.Vm                 { return self.evm }