{ "schema_version": "1.0.0", "generated_at": "2026-07-20T16:52:47Z", "name": "the fountain", "tagline": "toss a coin, make a wish", "description": "A daily peer-distribution ritual on Tezos: toss an exact one-tez coin with a public wish, then share the pot equally among the unique wallets that joined that round.", "category": [ "Tezos peer-to-peer money experiment", "on-chain public ritual", "equal peer distribution" ], "canonical_url": "https://tez-susu.pages.dev/fountain", "machine_url": "https://tez-susu.pages.dev/fountain.json", "language": "en", "license": "CC0-1.0", "network": { "blockchain": "Tezos", "chain": "mainnet" }, "release": { "active_generation": "v1", "status": "v1_live_deposits_discouraged", "status_label": "Legacy V1 public interface is paused; reviewed V2 awaits Mainnet funding", "recommended_mode": "observe_only", "deposits_discouraged": true, "checked_at": "2026-07-20T16:52:47Z", "active": { "generation": "v1", "contract_address": "KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW", "state": "legacy_experimental" }, "next": { "generation": "v2", "contract_address": null, "state": "mainnet_funding_pending", "intended_settlement": "Finalize the round in constant cost, then let each eligible wallet claim independently.", "audit_status": "separate correctness review and lifecycle smoke passed; not professionally audited", "reviewed_michelson_sha256": "267f245df855058347965a887594e4d1a9c55a3d5be0f1b15a0da8027a4ea427", "shadownet_candidate": { "contract_address": "KT1Xsdqa1K2aG5wrRNDZot3MxpoNEZtCy1Xj", "code_hash": 1760237160, "type_hash": 1632638859, "epoch_length_seconds": 120, "smoke_result": "passed three epoch boundaries, two simultaneous reserves, all six claims, failed-recipient isolation, zero residual balance, and accounting invariants" } } }, "mechanics": { "coin_amount_mutez": 1000000, "coin_amount_tez": "1", "round_length_seconds": 86400, "participation_unit": "unique sender address", "share_rule": "Each unique wallet that tosses at least once receives one equal share of the round's pot.", "extra_toss_rule": "Additional tosses from the same wallet increase the shared pot but do not create additional shares.", "wish_rule": "The wish is passed as bytes in the toss transaction. Neither generation adds it to contract storage, but transaction parameters are public and indexable.", "v1_settlement_trigger": "After the round deadline, any address may call overflow with zero tez. Settlement is not automatic.", "v2_settlement_trigger": "After the round deadline, any address may call finalize with zero tez; a late toss also finalizes the expired round atomically. The clock alone moves no money.", "v1_settlement": "V1 emits one equal tez transfer to every unique tosser in a single overflow operation.", "v2_settlement": "V2 finalizes one settlement record without a participant loop. Every eligible sender then claims one fixed share independently; one failed recipient cannot block other claims.", "v2_first_epoch": "The first accepted coin starts the first full-length day.", "v2_claim_expiry": "none; an unclaimed share stays reserved forever", "v1_rounding": "Any integer-division remainder is sent to the address that calls overflow.", "v2_rounding": "Any integer-division remainder stays in the contract and rolls into the next basin.", "house_fee": "none in the V1 contract logic", "promised_yield": false, "randomness": false }, "v1_contract": { "address": "KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW", "network": "mainnet", "originated_at": "2026-07-20T01:47:07Z", "entrypoints": [ { "name": "toss", "parameter": "bytes", "amount": "exactly 1000000 mutez" }, { "name": "overflow", "parameter": "unit", "amount": "0 mutez" } ], "evidence_snapshot": { "checked_at": "2026-07-20T16:08:29Z", "tzkt_level": 14144589, "balance_mutez": 0, "transaction_count": 0, "storage": { "epoch": "0", "epoch_length_seconds": "86400", "epoch_end": "2026-07-21T01:47:01Z", "pot_mutez": "0", "unique_tossers": "0", "lifetime_coins": "0", "lifetime_overflows": "0", "lifetime_volume_mutez": "0" } } }, "endpoints": { "human": "https://tez-susu.pages.dev/fountain", "descriptor": "https://tez-susu.pages.dev/fountain.json", "explorer": "https://tzkt.io/KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW", "contract": "https://api.tzkt.io/v1/contracts/KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW", "storage": "https://api.tzkt.io/v1/contracts/KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW/storage", "entrypoints": "https://api.tzkt.io/v1/contracts/KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW/entrypoints", "transactions": "https://api.tzkt.io/v1/operations/transactions?target=KT1UTu9vS3aJH3ktyVCF9DimjLKpqXGQkeGW&status=applied", "recent_wishes": "https://tez-susu.pages.dev/wishes", "recent_wishes_feed": "https://tez-susu.pages.dev/fountain-feed.json" }, "safety": { "funds_at_risk": true, "calls_irreversible": true, "wishes_public": true, "wallet_address_public": true, "professionally_audited": false, "many_wallet_attack": "One address receives one share, not one human. A participant can fund many addresses to take many shares, including value donated by repeat tosses from other wallets.", "v1_limits": [ "Overflow is a manual call after the deadline; a clock reaching zero does not move funds by itself.", "V1 creates all recipient transfers in one operation, so settlement cost grows with the number of unique tossers and can exceed practical operation limits.", "If a recipient contract rejects its transfer, the V1 overflow operation can fail for everyone.", "One wallet address receives one share; using multiple wallet addresses can receive multiple shares.", "A wish is public transaction data associated with its sender address." ], "v2_limits": [ "V2 removes the all-recipient payout loop but does not prevent one person from using many funded addresses.", "Closing is permissionless but not automatic; a late toss also closes an expired round before joining the next.", "Claims never expire, so shares controlled by lost keys remain locked forever.", "A rejecting recipient rolls back only that wallet's claim; the wallet can retry with another payable recipient.", "The contract and interface are experimental and not professionally audited." ], "guidance": "Do not deposit into legacy V1. Until a verified V2 Mainnet address is published, use the page in observe-only mode. After launch, verify the address and code hash before signing and use only tez you can afford to lose." }, "plain_language": { "what_it_is": "A fountain-shaped way to move tez among peers on a daily rhythm.", "what_one_coin_does": "It adds your wallet to the day's equal split and adds one tez to the shared pot.", "what_extra_coins_do": "They water the square: the pot grows, but your wallet still has one share.", "what_it_is_not": "It is not a savings account, investment, guaranteed return, lottery, or automatic income product." } }