This demo shows how to connect to the private Universa network, check the contract ID for network approval, load binary contract file, show some of its information and check its network status.

Some details

File indigo_demo_2025.json contains actual private network configuration.

Main.kt is a simple CLI tool that does it all.

Source Uni.kt contains a simple connection pool for universa clients to run in parallel with coroutines.

Contract IDs and Files

When using INDIGO demo, see History. In the operations history you can see contracts binary and in text form (some key fields for the demo).

You can also copy the contract ID (click on it in the contract line) or download its binary.

Both can be used with this tool to show and check network status.

Important note on contract approval states

Contracts, taken from the INDIGO, are not necessarily approved. For example, when you transfer funds, or pay invoices, some of the coin contracts will be modified, so old versions, presented in the logs, will not be approved anymore. This is quite normal and is a core feature of the Universa network.

Usage sample

If you have binary distribution built with gradle task ./gradlew installDist, you can run it from a console. Alternatively, you can download, unpack and run the same the prebuilt demo: indigo_demo_sample.zip.

build/install/indigo_demo_sample/bin/indigo_demo_sample -c test_contracts/indigo_2025-04-14T20-22-45.962Z.unicon

INDIGO sample console tool

Connecting to Universa network...
Connected. Here is the list of nodes:
http://31.41.155.11:8080 or https://31.41.155.11: J4ePqUDVy9Tj2n5pV9UCMxR1qhxS7eHMbUNzRXA6SEcwRF6kSNf5j1mDV9gbVnrk41Lwy2FY
http://37.9.5.102:8080 or https://37.9.5.102: JCi984dnqdgGq3YkYgLqbQKciMRqVhaE5hLSBi8vcfsNKw2KTR63ATCSfokBZ46wLT13PYag
http://37.9.4.133:8080 or https://37.9.4.133: J2ryG4uxnZxDUUoE8fz1ioPsdWcbwMkUMcZju6ZTpSTFJjF11Kd1Wn23DRrREbgxRNjq13BK
http://37.9.4.137:8080 or https://37.9.4.137: JfcHBZ4Wicj4t9YuTZDsKXsGGWstTgpftt7fnrWiro2hchNy2F9sHLT4x6RWDs8Hrh5EZyAq

Loaded contract: A0tD/Zc3QZ/hxfAESHb4C+Mzsd6VWRqVh4SMouplq7WfH9qUaaDZwgFS4DdVglhu4ks2raGPWYcgfsPfkxyg4i3sm9wiDIiR/VnwQ8v6GqeVVED6TOp8kSERpJFyCYRK
Definition ---------------------------------------------- 
Created   : 2025-04-05T02:24:48+03:00[Europe/Moscow]
Expires   : 2030-04-05T02:24:48+03:00[Europe/Moscow]
Ext.type  : null
Definition: {short_currency=TINDIGO, name=IndigoTest, description=Indigo test token, currency=TINDIGO}
State --------------------------------------------------- 
Revision : 1
Branch   : null/0
State data    : {amount=5.0E+2}
Transactional -------------------------------------------
data: {}

Checking contract Id: A0tD/Zc3…: Rejected

See above for the actual contracts.