[ANN] [TESTNET] Obsolete Coin (OBSC) | RandomX CPU

https://www.talkimg.com/images/2026/11/15/aafszm.png

Hi. I was bored and, using Codex, I developed a slow and crappy cryptocurrency based on Brisvia and Bitcoin Core, which nostalgically captures the aesthetic spirit of Geocities and the virtues of contemplation and waiting. It features a wallet, a CPU miner (RandomX PoW), and nodes for Windows and Linux. I've also implemented a fairly comprehensive transaction explorer and network status page on the website. For now, the network is a testnet, as I want to test system stability first. My node currently runs on a 2016 Dell 7040 micro, so it could crash at any moment.

Website: obsoletecoin.pages.dev
Wallet & Miner: obsoletecoin.pages.dev/downloads

Technical specifications:

- Name / working ticker: Obsolete Coin / OBSC
- Mining: RandomX proof of work, CPU
- Maximum authorized issuance: 1,000,000,000 OBSC
- Decimal places: 8
- Target block interval: 900 seconds / 15 minutes
- Difficulty adjustment: ASERT, every block; six-hour half-life
- Initial block reward: 5,000 OBSC
- Halving interval: 100,000 blocks, counted from block 1
- Genesis reward / premine: Zero / none
- Mining reward maturity: 100 blocks
- End of subsidy: Block 3,900,000; transaction fees thereafter
- Current network: Experimental testnet v0.2; mainnet disabled

GitHub repository and releases: github.com/jcib/obsoletecoin

More info on joining the testnet: obsoletecoin.pages.dev/join

Node Hosting & Mining Tutorial:

Windows
Download the native x64 installer and compare its SHA-256 with the published checksum. Tested on Windows 11.
Open Obsolete Coin. In Network -> Connect peer, enter the current public peer shown above.
Wait for synchronization and a connected peer. Compare your block height and hash with the explorer.
Select Open / Create, then Receive. Select Mine / Stop to run the one-thread CPU reference miner.
Linux
Extract the Linux archive and open a terminal in its directory. Replace PUBLIC_PEER with the address shown above.

Code:

python3 tools/node.py --peer PUBLIC_PEER

# In a second terminal:

Code:

python3 tools/wallet.py

What to test
Fresh synchronization, mining and confirmation of rewards.
Transfers between two independently created wallets, including exact fees and timestamps.
Restarting your own wallet, reconnecting and making an encrypted backup.
Report reproducible errors with operating system, package version, block height and redacted logs in GitHub Issues or the announcement thread.
Mining rewards require 100-block maturity. Fifteen minutes is an average target; initial test difficulty is easy and real waits vary. Do not interpret a mined reward as immediately spendable.

The first node is a Dell Micro 7040 from 2016 on a home connection. Availability is best effort; independent node operators are welcome. A dominant miner can reorganize this small network.

Any feedback, suggestions, or participation in the testnet would be immensely helpful. I'm not trying to make anything out of this—I just wanted to have fun testing AI capabilities to build a robust and simple blockchain.