FABJ-544 Add ability to check if a transaction is the init transaction (#106) (#108)

Signed-off-by: Danilo Faria <danilo@digitalasset.com>

Co-authored-by: Danilo Faria <danilo@digitalasset.com>

Author: bestbeforetoday

src/main/java/org/hyperledger/fabric/sdk/BlockInfo.java

@@ -465,6 +465,24 @@ public byte[] getChaincodeInputArgs(int index) {
                 return input.getArgs(index).toByteArray();
             }
 
+            /**
+             * Checks if this transaction is an init transaction.
+             * The init transaction is the one called to initialize a chaincode that requires the invocation of a
+             * function with an init flag set to true by calling either {@link TransactionRequest#setInit(boolean)}
+             * or passing --isInit if using the cli.
+             * @return boolean value indicating whether this is an init transaction
+             */
+            public boolean getChaincodeInputIsInit() {
+                if (isFiltered()) {
+                    return false;
+                }
+
+                ChaincodeInput input = transactionAction.getPayload().getChaincodeProposalPayload().
+                        getChaincodeInvocationSpec().getChaincodeInput().getChaincodeInput();
+
+                return input.getIsInit();
+            }
+
             int getEndorsementsCount = -1;
 
             public int getEndorsementsCount() {

src/test/java/org/hyperledger/fabric/sdkintegration/End2endLifecycleIT.java

@@ -473,6 +473,10 @@ void runChannel(HFClient org1Client, Channel org1Channel, SampleOrg org1, Collec
                     chaincodeName, chaincodeType, "a,", "100", "b", "300").get(testConfig.getTransactionWaitTime(), TimeUnit.SECONDS);
             assertTrue(transactionEvent.isValid());
 
+            if (initRequired) {
+                assertTrue(transactionEvent.getTransactionActionInfo(0).getChaincodeInputIsInit());
+            }
+
             transactionEvent = executeChaincode(org2Client, org2.getPeerAdmin(), org2Channel, "move",
                     false, // doInit
                     chaincodeName, chaincodeType, "a,", "b", "10").get(testConfig.getTransactionWaitTime(), TimeUnit.SECONDS);