ethereal

Ethereal is an ERC-20 token with a fixed supply that releases new tokens through a lightweight on-chain mining mechanism. Anyone holding a non-zero balance can compete every block by submitting data to be hashed. The hash with the greatest numerical value earns the block reward. This reward initially starts at 5 ETH and automatically halves after every 2,097,152 blocks. When the reward reaches zero, the full 72 million token supply will be in circulation and mining stops.

Mining works a lot like Bitcoin, but instead of expending great amounts of hardware power you simply craft a piece of data whose keccak256 hash beats the current hash stored in the contract. The first address to do so for a given block height becomes that block's miner and immediately receives the reward.

The halving schedule is enforced on-chain. The contract tracks the current block number (offset to start from 0), divides it by the halving interval to know which “era” it is in, and cuts the reward in half whenever a new era begins. This keeps issuance predictable and steadily tighter over time.

Requiring miners to hold a non-zero Ethereal balance helps deter spam, and a hash may be used only once, preventing replay attacks. Apart from the mining logic, Ethereal behaves exactly like a standard ERC-20 token. You can transfer, approve, and integrate it with wallets or DeFi protocols without any extra steps.

This is the address of the Ethereal contract deployed on the Ethereum blockchain:

Learn more about the mining process: