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, 2 insertions, 1 deletions

diff --git a/light/txpool_test.go b/light/txpool_test.go
index 4ff1006e5..0f797a9e8 100644
--- a/light/txpool_test.go
+++ b/light/txpool_test.go
@@ -87,7 +87,8 @@ func TestTxPool(t *testing.T) {
 	core.WriteGenesisBlockForTesting(ldb, core.GenesisAccount{Address: testBankAddress, Balance: testBankFunds})
 	// Assemble the test environment
 	blockchain, _ := core.NewBlockChain(sdb, testChainConfig(), pow, evmux)
-	gchain, _ := core.GenerateChain(nil, genesis, sdb, poolTestBlocks, txPoolTestChainGen)
+	chainConfig := &params.ChainConfig{HomesteadBlock: new(big.Int)}
+	gchain, _ := core.GenerateChain(chainConfig, genesis, sdb, poolTestBlocks, txPoolTestChainGen)
 	if _, err := blockchain.InsertChain(gchain); err != nil {
 		panic(err)
 	}