TransferWorld CorDapp

Send money to all your friends running Corda nodes!

Pre-Requisites

You will need the following installed on your machine before you can start:

• Latest JDK 8 installed and available on your path
• IntelliJ IDEA minimum version 2017.1
• git

Getting Set Up

To get started, clone this repository with:

 git clone https://github.com/arthurmsouza/transferworld-cordapp.git

And change directories to the newly cloned repo:

 cd transferworld-cordapp

Building the TransferWorld CorDapp:

Unix:

 ./gradlew clean deployNodes

Windows:

 gradlew.bat clean deployNodes

Running the Nodes:

Once the build finishes, change directories to the folder where the newly built nodes are located:

Kotlin:

 cd build/nodes

Unix:

 ./runnodes

Windows:

runnodes.bat

You should now have three Corda nodes running on your machine serving the TransferWorld CorDapp.

Five windows will open in the terminal. One for each node's node shell, plus webservers for Bank A and Bank B.

Interacting with the CorDapp via HTTP

The TransferWorld CorDapp defines a couple of HTTP API end-points.

The nodes can be found using the following port numbers output in the web server terminal window or in the build.gradle file.

 BankA: localhost:10007
 BankB: localhost:10010

Sending amount of money from Bank A to Bank B

http://localhost:10007/api/transferworld/transfer?target=BankB&amount=100

Showing all of Bank B's amounts:

 http://localhost:10010/api/transferworld/amounts

Finding out who Bank B is:

http://localhost:10010/api/transferworld/me

Finding out who Bank B can send amount of money to:

http://localhost:10010/api/transferworld/peers

Using the RPC Client

Use the gradle command (for Bank A):

 ./gradlew runTransferWorldRPCNodeA

or (for Bank B):

 ./gradlew runTransferWorldRPCNodeB

When running it should enumerate all previously received amount of money as well as show any new amount received when they are sent to you.

Using the node shell

The node shell is a great way to test your CorDapps without having to create a user interface.

When the nodes are up and running, use the following command to send a amount of money to another node:

flow start TransferFlow target: [NODE_NAME]

Where NODE_NAME is 'BankA' or 'BankB'. The space after the : is required. As with the web API, you are not required to use the full X500 name in the node shell. Note you can't sent a amount of money to yourself because that's not cool!

To see all the amounts of money in your vault:

run vaultQuery contractStateType: net.corda.transferworld.state.AmountState

##Test IDEA issues

Fiber classes not instrumented If you run JUnit tests that use flows then IntelliJ will use a default JVM command line of just

-ea, which is insufficient.

You will need to open the run config and change it to read

-ea -javaagent:lib/quasar.jar

and make sure the working directory is set to the root of the Corda repository. Alternatively, make sure you have the quasar.jar file in your application source tree and set the paths appropriately so the JVM can find it.