This project provides a script that can be passed to multichain's runtime variable walletnotify in the blockchain project of Trubudget. The script is executed when a transaction is done. More information how walletnotify works can be found in the runtime-parameter-list of multichain. The script checks the transaction type and executes sideEffects programmed for each recognized type.

All of Trubudget's events have a certain type. For each event a transaction is created on the blockchain. The multichain feed can perform side effects for specific transactions. An Example for a side effect is the notification_created transaction. On each notification_created transaction a file is saved locally. The different types can be found in Trubudget's api project. In the domain layer of the api all events which create transactions can be found.

The following list shows all recognized transactions with side effects:

• notification_created

This type of event/transaction defines the creation of one notification. The notification id and the recipient can be found in the event defined by Trubudget's api. The notification_transaction_example.json file shows how the structure of such a transaction looks like.

Saves the transactions as json file locally. Notification transactions are saved locally into the notifications directory as json files. The files have a timestamp as name. Details about all environment variables can be found in the configuration section of the blockchain project.

To test the multichainFeed.go

• Navigate into the root directory of the mutlichain-feed project.
• Build the go project.
• Execute the generated binary with a valid transaction

Type in following commands:

cd multichain-feed
go build .
./multichain-feed "$(cat ./examples/notification_transaction_example.json)"