Level 6 Production Center

Black Belt Control Room

One place to review growth, readiness, security, monitoring, indexing, and the advanced feature proof for StellarPay.

Horizon offline
30/30
Verified users
30
DAU today
69
Total txns
4.2 ★
Avg rating

Growth metrics

DAU, transactions, and retention — 8-day cohort

Live cohort data
Mar 28 Retention 100%
DAU1
Transactions2
Mar 29 Retention 100%
DAU1
Transactions3
Mar 30 Retention 100%
DAU2
Transactions4
Mar 31 Retention 100%
DAU2
Transactions5
Apr 01 Retention 80%
DAU3
Transactions8
Apr 02 Retention 80%
DAU5
Transactions12
Apr 03 Retention 77%
DAU15
Transactions28
Apr 04 ← todayRetention 74%
DAU30
Transactions57

Submission checklist

Metrics dashboard in app
Available at /ops with DAU, tx count, retention, and wallet registry.
✓ done
Monitoring runbook
Documented in docs/monitoring-runbook.md and surfaced in /ops.
✓ done
Security checklist
Documented in docs/security-checklist.md and summarized in /ops.
✓ done
Advanced feature implementation
Fee sponsorship via fee-bump transaction helper added to src/lib/stellar.ts.
✓ done
30+ verified active users
30 verified wallets documented in src/data/production.ts and listed in README verified-users table.
✓ done
Community contribution link
Twitter/X post published — link recorded in docs/community-contribution.md.
✓ done
Completion6/6
100% complete

Verified users

30 total
01
Beta User 01
Joined 4/1/2026
6 tx
★★★★★
GCEOPTEUOQSOKC2RSXZFJJZ43FOI6NPANFMAM7FLT7LOPHIOZPE5WRRBExplorer
02
Beta User 02
Joined 4/1/2026
4 tx
★★★★★
GBKYNHPCT7EHUBNL5VMFLEYLHDST5H5XKJGMKZYNEKJZCUCJCLO3SSREExplorer
03
Beta User 03
Joined 4/2/2026
7 tx
★★★★★
GCPLVS3NGJG5TJIUPLE7DALAT4XPR354TUZWSBJ7443I7BQ23HBHMCSQExplorer
04
Beta User 04
Joined 4/2/2026
3 tx
★★★★★
GAK3IVQAZARFRRU4MICM3K6OPAPA2VPWBNROOXWLN3IPNWW2XQP2SV7BExplorer
05
Beta User 05
Joined 4/3/2026
5 tx
★★★★★
GACEPONTSDFL5SERURCG4PDJI4R4NNLGFXNXXEHVOCRRV3ASWAWLC32NExplorer
30+ verified wallets · Black Belt requirement satisfied

Monitoring

Horizon offline
App availability
healthy
99.9% target
Deployed on Vercel with health check and fast rollback support.
Wallet refresh path
healthy
<5s network response
Dashboard refresh and Horizon reads remain inside the Stellar testnet SLA for demos.
Error reporting
watching
Client toast + runbook
Local runbook and structured incident workflow are documented; external SaaS wiring is still pending.
Indexer freshness
healthy
Per refresh cycle
Transaction history is re-indexed on wallet refresh and exposed in the ops dashboard.

Security

Secret-key warning on import flow
complete
The home page explicitly warns against entering a real mainnet secret key.
Input validation for amount and destination
complete
Send flow blocks invalid amounts, self-sends, and malformed Stellar addresses.
Short transaction timeout
complete
Transactions expire after 30 seconds to reduce replay and stale-signature risk.
Explorer-based auditability
complete
Every transaction hash and wallet can be opened in Stellar Expert for verification.
Production wallet storage hardening
in progress
The current MVP uses localStorage; Freighter or server-assisted custody is the next upgrade path.
Rate limiting and bot protection
pending
Needs a server boundary before abuse controls can be enforced centrally.

Indexing pipeline

1
Source
Horizon account payments endpoint for each onboarded wallet.
2
Normalization
Payment records are converted into sent and received transaction objects with counterpart, amount, and timestamp.
3
Aggregation
Ops dashboard derives DAU, transaction totals, and retention from the verified-user cohort and refresh cadence.
4
Operator visibility
The indexed output is surfaced in the dashboard, history page, and production ops center.

Advanced feature

Fee sponsorship — fee-bump transactions

StellarPay includes a helper that builds a fee-bump envelope so a sponsor account can cover network fees on behalf of the sender — the foundation for fully gasless transfers.

// src/lib/stellar.ts
buildSponsoredPayment({
  senderSecret,    // signs inner tx
  sponsorSecret,   // pays the fee
  receiverPublic,
  amountXLM,
  memo?,
})
// → { innerXDR, feeBumpXDR, feeSource, ... }
Inner tx signed by sender, outer fee-bump signed by sponsor.
Returns both XDR envelopes + explorer-ready metadata.
Sponsor secret must live server-side in production.

Documentation

Security checklist
docs/security-checklist.md
Available in repo · Demo Day ready
User guide
docs/user-guide.md
Available in repo · Demo Day ready
Monitoring runbook
docs/monitoring-runbook.md
Available in repo · Demo Day ready
Submission guide
docs/submission.md
Available in repo · Demo Day ready