Eliminate the need for TransactionContext

- Functionality related to block information is added to KernelInterface
- SideEffects are added to TransactionResult

src/org/aion/interfaces/tx/Transaction.java

@@ -19,6 +19,4 @@ public interface Transaction extends Cloneable, TransactionInterface {
     long getNrgConsume();
 
     void setNrgConsume(long _nrg);
-
-    Address getContractAddress();
 }

src/org/aion/vm/api/interfaces/KernelInterface.java

@@ -307,4 +307,41 @@ public interface KernelInterface {
      * @return True if this address can be invoked from the calling {@link VirtualMachine}.
      */
     boolean destinationAddressIsSafeForThisVM(Address address);
+
+    /**
+     * Returns the number of the block that this kernel interface is at.
+     *
+     * @return The block number.
+     */
+    long getBlockNumber();
+
+    /**
+     * Returns the timestamp of the block that this kernel interface is at.
+     *
+     * @return The block timestamp.
+     */
+    long getBlockTimestamp();
+
+    // TODO: block energy limit can probably be removed.
+
+    /**
+     * Returns the energy limit of the block that this kernel interface is at.
+     *
+     * @return The block energy limit.
+     */
+    long getBlockEnergyLimit();
+
+    /**
+     * Returns the difficulty of the block that this kernel interface is at.
+     *
+     * @return The block difficulty.
+     */
+    long getBlockDifficulty();
+
+    /**
+     * Returns the address of the miner of the block that this kernel interface is at.
+     *
+     * @return The miner's address.
+     */
+    Address getMinerAddress();
 }

src/org/aion/vm/api/interfaces/TransactionInterface.java

@@ -30,6 +30,12 @@ public interface TransactionInterface {
      */
     Address getDestinationAddress();
 
+    /**
+     * Returns the address of the contract that this transaction will create.
+     *
+     * @return The destination address.
+     */ Address getContractAddress();
+
     /**
      * Returns the nonce of this transaction, which is the nonce of the sender account.
      *
@@ -92,4 +98,11 @@ public interface TransactionInterface {
      * @return True if this transaction creates a new contract.
      */
     boolean isContractCreationTransaction();
+
+    /**
+     * Returns the kind of the corresponding transaction. For example, CREATE or CALL.
+     *
+     * @return The transaction kind.
+     */
+    byte getKind();
 }

src/org/aion/vm/api/interfaces/TransactionResult.java

@@ -69,5 +69,12 @@ public interface TransactionResult {
      */
     void setEnergyRemaining(long energyRemaining);
 
+    /**
+     * Returns the side-effects that were the result of executing the corresponding transaction.
+     *
+     * @return The execution side-effects of the transaction.
+     */
+    TransactionSideEffects getSideEffects();
+
     byte[] toBytes();
 }

src/org/aion/vm/api/interfaces/VirtualMachine.java

@@ -35,17 +35,17 @@ public interface VirtualMachine {
     void shutdown();
 
     /**
-     * Executes the transactions contained in the array of contexts in such a way that the logical
-     * ordering of the transactions is preserved.
+     * Executes the transactions in such a way that the logical ordering of the transactions is
+     * preserved.
      *
      * <p>This method possibly runs asynchronously and returns its results to the caller via a non-
      * blocking {@link SimpleFuture} array.
      *
      * @param kernel The {@link KernelInterface} representing the blockchain state for these transactions.
-     * @param contexts The transaction contexts to execute.
+     * @param transactions The transactions to execute.
      * @return The results of the execution.
      * @throws ClosedVirtualMachineException if no long-lived instance of this class currently
      *     exists.
      */
-    SimpleFuture<TransactionResult>[] run(KernelInterface kernel, TransactionContext[] contexts);
+    SimpleFuture<TransactionResult>[] run(KernelInterface kernel, TransactionInterface[] transactions);
 }