core, core/state, trie: EIP158, reprice & skip empty account write

This commit implements EIP158 part 1, 2, 3 & 4

1. If an account is empty it's no longer written to the trie. An empty
  account is defined as (balance=0, nonce=0, storage=0, code=0).
2. Delete an empty account if it's touched
3. An empty account is redefined as either non-existent or empty.
4. Zero value calls and zero value suicides no longer consume the 25k
  reation costs.

params: moved core/config to params

Signed-off-by: Jeffrey Wilcke <jeffrey@ethereum.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/internal/ethapi/tracer_test.go b/internal/ethapi/tracer_test.go
index 577b426f1..b88178a6d 100644
--- a/internal/ethapi/tracer_test.go
+++ b/internal/ethapi/tracer_test.go
@@ -29,11 +29,6 @@ import (
 	"github.com/ethereum/go-ethereum/params"
 )
 
-type ruleSet struct{}
-
-func (self *ruleSet) IsHomestead(*big.Int) bool    { return true }
-func (*ruleSet) GasTable(*big.Int) params.GasTable { return params.GasTableHomesteadGasRepriceFork }
-
 type Env struct {
 	gasLimit *big.Int
 	depth    int
@@ -46,7 +41,9 @@ func NewEnv(config *vm.Config) *Env {
 	return env
 }
 
-func (self *Env) RuleSet() vm.RuleSet    { return &ruleSet{} }
+func (self *Env) ChainConfig() *params.ChainConfig {
+	return params.TestChainConfig
+}
 func (self *Env) Vm() vm.Vm              { return self.evm }
 func (self *Env) Origin() common.Address { return common.Address{} }
 func (self *Env) BlockNumber() *big.Int  { return big.NewInt(0) }