chain[CRYPT]
The Pact

chainCRYPT is a Diablo-style action RPG that lives entirely on Ethereum. Combat resolves on-chain via pure deterministic functions; items and heroes are ERC-721; the only off-chain code is a browser viewer that calls public RPC.

Hard constraints: no backend server, no signed admin payloads, no proxy upgrades, and no multisig with privileged powers. Ownership is renounced at deploy, and once mainnet is live the contracts are immutable.

• Cap: 100,000,000
• Initial mint: 66,660,000 (50M deployer + 16.66M Treasury seed)
• Emission reserve: 33,340,000 - never minted unless drained via Run/Arena rewards
• ERC-20 + Permit with cap enforced in _update
• Pre-trade lock: deployer-only transfers until enableTrading() is called once
• Ownership renounced immediately after wiring

Four classes, distinct base stats and per-level growth. Class is permanent. Skill bar (3 of 6 skills) is mutable. Three equipment slots: weapon, armor, jewel.

3 slots × 8 bases = 24 base items. 4 rarities: Normal, Magic, Rare, Unique. 24 affixes split across flat-stat, percent-stat, and binary flag effects. Unique items have hand-tabulated names from a 192-entry table.

Combat is a pure function:

function resolveRun(hero, biome, mlvl, entropy)
    internal pure returns (RunResult);
function resolveArena(a, d, entropy)
    internal pure returns (ArenaResult);

Damage formula: (max(0, ATK - DEF) + max(0, MAG - RES)) * variance(90..110%). Crit applies 175% multiplier. Damage capped at 80% of target maxHP per swing.

1. commitRun(heroId, mlvl, biome) - pays entry fee, records commit block
2. Wait 50 blocks (no action needed)
3. claimRun(runId) - fetches blockhash, derives entropy, resolves combat, mints up to 3 items, awards XP/gold

The 50-block wait makes seed-grinding pointless - the player commits before knowing the outcome. The 200-block claim window prevents stuck Runs.

One-shot deterministic PvP. Both heroes' stats are reconstructed from chain state at fight time. 32-round cap. Tie goes to defender. 50-block cooldown per hero across both attack and defend slots.

The hook reads $CRYPT swap volume to set a "mood":

• CALM - default
• BOSS_EVENT - >1% supply traded in 256 blocks; +50% gold, +affix weight on Rare
• DROUGHT - <0.05% supply traded in 1024 blocks; -25% gold
• SURGE - net buys > 2× sells in 256 blocks; recycles 25% drought reserve to rewards

The hook deploys at an address mined for v4 permission bits (0x00C0 in low 14 bits).

Sinks: Run entry fee (5 + mlvl × 0.25 CRYPT), Arena entry fee (10 CRYPT), affix reroll (mlvl × 2 CRYPT, burned).

Sources: Run rewards (50 + mlvl × 4, mood-adjusted), Arena rewards (50 attacker / 25 defender), boss bonus (1000 at mlvl 99).

After mainnet deploy, every contract is verified on Etherscan. Footer of every page lists addresses. Below: live wax-seal stamps.