dutchauction

⚠️ 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

Example calls

# 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.

Toolchain 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.