Add support for Scash

[bitcartel]

Scash is Bitcoin with SHA256 PoW replaced with Monero's RandomX

• https://s.cash
• https://twitter.com/scashnetwork
• Miners on Discord: https://discord.com/invite/T4Jcw2c95V

Scash is based on Bitcoin Core 26.0 with changes detailed in the protocol spec here: https://github.com/scash-project/sips/blob/main/scash-protocol-spec.md

Highlights:

• block header has an extra field
• block hash is no longer used to meet the block target, instead a RandomX commitment must meet the target
• the latest version of RandomX 1.2.1 is required, which features commitments

There is a cpuminer for solo mining with the node, using RPCs getblocktemplate and submitblock

• https://github.com/scash-project/cpuminer-scash/

Happy to help with any testing. Thanks!

[blackmennewstyle]

Thanks for the proposal.

I will look into it when i have more free time.

It won't be an easy implementation since it is a mix between Bitcoin family and RandomX.

[bitcartel]

Thanks for considering. Ping me anytime.

FYI: A pool went live today https://pool.rplant.xyz/#satoshicash#connect and looks like there is a closed source binary miner too: https://github.com/doktor83/SRBMiner-Multi/releases/tag/2.5.2

[magicalgirlsunite]

Are you still working on this Mr?

[blackmennewstyle]

I started but never had time to finish. It's not an easy implementation without any pool reference.
Also they have a custom RandomX POW library.

[bitcartel]

Hi @blackmennewstyle

There is a testnet node running, but it's not mining any blocks.

You can do a lookup against the DNS seeder to find testnet nodes:

dig testnet.seed.scash.one

If you run your own testnet node, add the following to your scash.conf file, so the node can use the DNS seeder to find other testnet nodes:

[scashtestnet]
adddnsseed=testnet.seed.scash.one

Run the cpuminer to mine blocks with your local testnet node: https://github.com/scashnetwork/cpuminer-scash

./minerd -o 127.0.0.1:18342 -O username:password -t 4 --coinbase-addr=YOUR_SCASH_TESTNET_ADDRESS

[bitcartel]

Hi @blackmennewstyle do you have an ETA for when the next release of MiningCore (as used here https://satoshicash.cedric-crispin.com/) with support for Scash will be released? Thanks.

[blackmennewstyle]

Not to worry i always share my implementations despite receiving most of the time nothing less than drama and hate lol

I'm trying to build a quick bag out of my hard work because people in that space tend to do not like to donate, as soon as my goal is achieved, the implementation goes public like all previous implementations.

[blackmennewstyle]

Commit c04221a adds support for SCASH 🔥 🚀

In order to work properly the following procedure details how to setup a SCASH node for pool mining.

The SCASH dev has been more than helpful so please refer to his initial comments for information and wisdom. And knowledge is always what you seek as a mining pool operator. BEFORE even considering jumping into the SCASH network, make sure you fully master all the economics and mechanics behind it.

How to configure the scashd daemon?

The following option is mandatory based the pool config shared as example, however you can obviously adjust the configuration to your own preferences:

(TESTNET)

zmqpubhashblock=tcp://127.0.0.1:18344

(MAINNET)

zmqpubhashblock=tcp://127.0.0.1:8344

A pool configuration for SCASH can be found inside the examples folder: https://github.com/blackmennewstyle/miningcore/blob/dev/examples/satoshicash_pool.json

Replace all the specific options with the correct expected values: <user> & <password>. It should be plug and play as long as everything is filled correctly.

SCASH being a bitcoin fork running a custom RandomX algo, the same options for RandomX customization are available and allowed within your pool configuration file.

[bitcartel]

Thanks for adding support!