1 stable release
1.2.0 | May 6, 2024 |
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#58 in #mining
56 downloads per month
Used in spam-cli-mod
195KB
2.5K
SLoC
Contains (ELF exe/lib, 795KB) tests/buffers/metadata_program.bpf
Spam
Spam is a digital currency you can mine from anywhere, at home or on your phone. It uses a novel proof-of-work algorithm to guarantee no miner can ever be starved out from earning rewards.
How it works
The primary innovation of Spam is to offer non-exclusive mining rewards. This means one miner finding a valid solution does not prevent another miner from finding one as well. Rather than setting up every miner in a winner-take-all competition against one another, Spam gives each miner a personalized computational challenge. As long as a miner provides a valid solution to their own individual challenge, the protocol guarantees they will earn a piece of the supply. Since no miner can be censored from the network and valid solutions are non-exclusive, starvation is avoided.
Supply
Spam is designed to protect holders from runaway supply inflation. Regardless of how many miners are active in the world, supply growth is strictly bounded to a rate of 0 ≤ R ≤ 2 SPAM/min
. In other words, linear. The mining reward rate – amount paid out to miners per valid solution – is dynamically adjusted every 60 seconds to maintain an average supply growth of 1 SPAM/min
. This level was chosen for its straightforward simplicity, scale agnosticism, and for striking a balance between the extremes of exponential inflation on one hand and stagnant deflation on the other.
Program
Consts
– Program constants.Entrypoint
– The program entrypoint.Errors
– Custom program errors.Idl
– Interface for clients, explorers, and programs.Instruction
– Declared instructions and arguments.Loaders
– Validation logic for loading Solana accounts.
Instructions
Initialize
– Initializes the Spam program, creating the bus, mint, and treasury accounts.Reset
– Resets the program for a new epoch.Register
– Creates a new proof account for a prospective miner.Mine
– Verifies a hash provided by a miner and issues claimable rewards.Claim
– Distributes claimable rewards as tokens from the treasury to a miner.UpdateAdmin
– Updates the admin authority.UpdateDifficulty
- Updates the hashing difficulty.
State
Bus
- An account (8 total) which tracks and limits the amount mined rewards each epoch.Proof
- An account (1 per miner) which tracks a miner's hash, claimable rewards, and lifetime stats.Treasury
– A singleton account which manages program-wide variables and authorities.
Tests
To run the test suite, use the Solana toolchain:
cargo test-sbf
For line coverage, use llvm-cov:
cargo llvm-cov
Dependencies
~23–32MB
~516K SLoC