docs(genesis): document the Launch Pool soft cap - #562
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The soft cap shipped in the Genesis program and JS client 0.42.0 (LaunchPoolV2Extensions.soft_cap / LaunchPoolV2ExtensionType::SoftCap) but was not documented anywhere on the developer hub. - Add a "Launch Pool Soft Cap" section covering configuration, the oversubscription split, the pro-rata excess refund, and how a soft cap interacts with minimumQuoteTokenThreshold - Document refundLaunchPoolV2, which serves both the failed-floor full refund and the oversubscribed excess refund, with a new umi example - Note that softCap is a required argument on addLaunchPoolBucketV2 in 0.42.0 and must be passed as null when no cap is wanted - Add a Launch Pool extensions table and a Common Errors table covering InvalidSoftCap (221) and SoftCapBelowThreshold (222) - Replace the "Out of Scope" section with an inline callout, per the GEO/LLM rubric
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Summary by CodeRabbit
WalkthroughThe PR documents Launch Pool soft caps, minimum quote token thresholds, and refund behavior. It adds generated and executable Umi examples for ChangesLaunch Pool refunds
Priority: ⬇️ Low Estimated code review effort: 2 (Simple) | ~10 minutes Change: Other Sequence Diagram(s)sequenceDiagram
participant UmiClient
participant GenesisProgram
participant Solana
UmiClient->>GenesisProgram: refundLaunchPoolV2(genesisAccount, launchPoolBucket, baseMint, recipient)
GenesisProgram->>Solana: Derive refundable amount and transfer refund
Solana-->>UmiClient: Transaction signature and confirmation
Merge Risk: 🔵 Low · up to Readers may receive incomplete or imprecise Launch Pool guidance, especially in localized documentation, but the changes introduce no demonstrated production behavior risk. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@src/pages/en/smart-contracts/genesis/launch-pool.md`:
- Line 545: Add a concise declarative BLUF sentence immediately below the
“Common Errors” heading and before the error table, summarizing that the section
covers invalid soft-cap settings and launch pool states that reject refund
requests.
- Line 321: Update the rounding explanation near filled to state that each
deposit contributes less than one quantum unit and aggregate dust can reach up
to depositCount - 1 quantum units, replacing the unsupported “few” bound.
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src/examples/genesis/refund_launch_pool_v2/index.jssrc/examples/genesis/refund_launch_pool_v2/umi.jssrc/pages/en/smart-contracts/genesis/launch-pool.md
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Why
The Launch Pool soft cap shipped in the Genesis program and JS client
0.42.0, but the developer hub had zero mentions of it —grep -ri "soft cap"across the repo returned nothing. Nothing was tracked in Linear for the docs either; the feature issues (APP-585, APP-599, APP-600, APP-588, APP-590, APP-591) are all Done with no docs follow-up.What
Adds a
## Launch Pool Soft Capsection to/smart-contracts/genesis/launch-poolcovering:softCaponaddLaunchPoolBucketV2, plus the two validation rules (InvalidSoftCap221,SoftCapBelowThreshold222) and the pre-finalize-only constraint.filled/excesssplit with thediv_ceilrounding that keeps the bucket solvent, and a worked example showing that the effective price is capped atsoftCap / baseTokenAllocation.refundLaunchPoolV2— previously undocumented. Serves both the failed-floor full refund and the oversubscribed excess refund. Newsrc/examples/genesis/refund_launch_pool_v2umi example.minimumQuoteTokenThreshold— a matrix of the four floor/ceiling configurations, since the floor was also undocumented on this page and the refund path depends on it.Also adds a Launch Pool extensions table, a Common Errors table,
softCap/refundedfields in the state-fetching snippets, four FAQ entries (mirrored intofaqsfrontmatter for FAQPage JSON-LD), and five glossary terms.Note for reviewers — possible SDK bug
softCapis required onaddLaunchPoolBucketV2in@metaplex-foundation/genesis0.42.0. Every other extension gets a?? none()default in the generated serializer;softCapdoes not, and its type has no?:This means existing Launch Pool snippets that omit
softCapno longer typecheck against 0.42.0. The docs now say to passsoftCap: null, but this looks like a kinobi codegen gap worth fixing on the SDK side rather than documenting around permanently.Out of scope
mplxCLI has no soft cap flag yet (confirmed againstmetaplex-foundation/climain). The page notes this./ja,/ko,/zhwill follow in a separate PR per the repo's edit-English-first workflow.Verification
pnpm run buildpasses; the page renders with the new sections and the FAQ JSON-LD.slugifyHeading.metaplex-foundation/genesismain:buckets/extensions.rs,launchpool/state/launchpool_extensions.rs,launchpool/processor/refund_launchpool_v2.rs,trigger_behaviors_v2/bucket_transition_context.rs,behaviors/send_start_price.rs.