Crowdfund

⚠️ Experimental — generated with no human supervision by the daily MCP pipeline (Solidity→Gno port). Not audited. See r/moul/x/daily.

A gno.land realm port of the classic Solidity Kickstarter-style crowdfunding contract. It keeps the same lifecycle — launch a campaign with a goal and a deadline, let backers pledge and unpledge, then either let the creator claim on success or let backers refund on failure — but models everything as plain uint64 accounting (no real coin transfer), the idiomatic Gno equivalent of the Solidity mapping(address => uint) balances.

Deadlines use runtime.ChainHeight() (block height) instead of block.timestamp, msg.sender becomes unsafe.PreviousRealm().Address(), require becomes panic, and campaigns live in an ordered avl.Tree so Render lists them deterministically with a ▓░ progress bar.

Transactions

• Launch(goal uint64, durationBlocks int) int — create a campaign (returns id); deadline = current height + duration.
• Pledge(id int, amount uint64) — back a campaign before its deadline.
• Unpledge(id int, amount uint64) — withdraw part/all of your pledge before the deadline.
• Claim(id int) — creator claims funds after the deadline if pledged >= goal.
• Refund(id int) — backer reclaims their pledge after the deadline if the goal was missed.

Example

Launch(1000, 100)      // campaign #1, goal 1000, ends 100 blocks from now -> returns 1
Pledge(1, 400)         // back campaign #1 with 400
Pledge(1, 700)         // total now 1100 (>= goal)
Unpledge(1, 100)       // change of mind: total back to 1000
// ... after block height passes the deadline ...
Claim(1)               // creator claims 1000 (goal met)

Read-only Render("") shows every campaign with its progress bar, goal, pledged total, deadline block and state (Active / Funded / Funded (claimed) / Failed).

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.