Package dutchauction ports the classic Solidity Dutch-auction pattern to gno.land: a seller lists an item at a high s...
⚠️ Experimental — generated with no human supervision. This realm was produced automatically by an MCP-driven agent to exercise the gno MCP server and tooling, and to generate test content for gno compilers, linters and formatters. Not audited. Not for production. Full context & folder README: r/moul/x/daily
A Gno port of the classic Solidity Dutch-auction pattern: list an item at a
high starting price that decays linearly, block by block, down to a floor.
The first buyer to call Buy gets it at whatever the price is at that exact
block — no bidding war, just a clock ticking against the seller. Payment is
real ugnot, escrowed by the chain with the transaction; overpayment is
refunded automatically and the settled price is forwarded straight to the
seller.
Realm path: gno.land/r/g12cs4cehujpffpjpywmkqj43m6u5ya53nj69sjz/dutchauction
# list an item: 1000 ugnot down to a 100 ugnot floor over 100 blocks
List(cur, "vintage synth", 1000, 100, 100) -> "1"
# anyone can check the live price without paying anything
CurrentPrice("1") -> 1000, decaying toward 100 as blocks pass
# buy at the current price, sending >= CurrentPrice("1") ugnot with the tx;
# any excess is refunded in the same call
Buy(cur, "1") -> price actually paid
# the seller can pull a listing before anyone buys it
Cancel(cur, "1")
Render("") lists every auction with its live price, floor, start price,
and status.
gno test . passes (7/7) against gnolang/gno master (master.3130+bf5b31eda)
with GNOROOT pointed at a full checkout — the local gno on PATH ships
without a bundled stdlib tree, so GNOROOT had to be set explicitly to
resolve chain, chain/banker, chain/runtime, and
gno.land/p/nt/avl/v0/testutils/v0. gno lint . is clean. Target chain is
sapphire (gno 0.9); code sticks to the documented chain/* stdlib family and
crossing-function (cur realm) convention used by the other realms in this
batch.
Part of moul/gno-contracts — moul's versioned gno.land contracts. See the repository for the full catalog, build/test tooling, and usage.
Dependency graph:
🧪 Highly experimental — potentially vibe-coded. Not audited; may break, change, or be removed at any time. Do not use with anything of value. Full disclaimer: DISCLAIMER.
Package dutchauction ports the classic Solidity Dutch-auction pattern to gno.land: a seller lists an item at a high starting price that decays linearly, block by block, down to a floor price. The first buyer to call Buy pays whatever the price is at that moment — real ugnot, escrowed by the chain with the transaction and forwarded to the seller on settlement. Overpayment is refunded automatically. State-mutating functions are crossing functions (`cur realm`) per the gno 0.9 interrealm convention.
Buy purchases auction id at its current price. The caller must send at least that many ugnot with the transaction; any excess is refunded immediately. Only a direct EOA transaction (MsgCall) may buy, so the payment envelope can't be spoofed via an ephemeral MsgRun realm. Returns the price actually paid. Crossing function.
Cancel withdraws an active auction. Only the seller may cancel, and only before it's bought. Crossing function.
CurrentPrice returns id's price at the current chain height.
List creates a new Dutch auction for item, starting at startPrice ugnot and falling linearly to floorPrice over durationBlocks. Returns the new auction's ID. Crossing function.
Render produces the gnoweb Markdown view: a table of every auction, newest first, with live prices. Not a crossing function.
