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By The Merchant Settlement Rail for Africa
Slimepay operates two products, both powered by Stellar's integration track building blocks:
1. Stellar Anchor — NGN On/Off-Ramp (SEP-24 / SEP-6)
Slimepay deploys the Stellar Anchor Platform (SAP) to operate as a Stellar Anchor for Nigerian Naira (NGN). We implement SEP-24 to power interactive crypto-to-fiat withdrawal flows: users send USDC or XLM via Stellar, and Slimepay's settlement engine converts and delivers NGN to their verified Nigerian bank account. SEP-6 enables non-interactive programmatic withdrawal flows for automated settlement. Stellar integration impact: every NGN settlement becomes an on-chain Stellar event, generating verifiable testnet transaction volume.
2. Merchant Checkout Gateway (SEP-24 + Stellar Wallets Kit)
A plug-and-play checkout module enabling African merchants to accept USDC or XLM from global customers and receive NGN automatically. Stellar Wallets Kit is integrated into the checkout frontend — customers connect Freighter or Lobstr wallets and initiate a SEP-24 withdrawal flow. SAP handles the full compliant user journey, assigns memos, and routes settlement to Slimepay's Business Server for NGN payout via SafeHaven. Stellar integration impact: every merchant checkout is a Stellar-native withdrawal, with full on-chain auditability on testnet.
3. B2B Settlement API (SEP-31)
A developer-facing REST API for payroll platforms, freelance marketplaces, and fintechs to embed NGN settlement. Partners initiate cross-border payments via Slimepay's API; SAP routes the Stellar-based payment through the SEP-31 receive endpoint, and Slimepay's Settlement Engine delivers NGN to the recipient's bank account via SafeHaven. Stellar integration impact: B2B partner integrations create compounding testnet volume — each partner brings their user base onto Stellar-powered settlement flows without end-users needing blockchain knowledge.
$35.0K
Our verified traction metrics as of August 2026 are as follows:
Active Users: 500+ registered and transacting users on the Slimepay platform
Over 600+ transactions on multichain.
Transaction Count & Daily NGN Payouts: Evidence of live transaction activity and daily NGN bank payouts is publicly available here: ( https://docs.google.com/document/d/1xhcn4-C6RlC78-OEFCjBsWQD5Xl3fMXO8YFDfoebpQ8/edit?usp=sharing )
B2B Partner Activity: Signed merchant partnership agreements confirming active B2B partners are available here: https://drive.google.com/drive/folders/1LCLgLmSKnYIbwq_y8WHaSub9Y8HzQj5f?usp=drive_link
Production access with all required providers is confirmed and active:
SafeHaven: Live and integrated in Slimepay's production environment, powering NGN (Naira) fiat payouts to verified Nigerian bank accounts. Signed contract agreement and production access evidence available here: https://drive.google.com/drive/folders/11q6X0ngzvo44_net2hTt1iLoC8f2cDnW?usp=drive_link
Dojah: Live and integrated in Slimepay's production environment, powering KYC and identity verification for Slimepay's existing user base. Signed contract agreement and production access evidence available at the same link above.
TRANCHE 1 (DELIVERABLE ROADMAP) - CORE ANCHOR INFRASTRUCTURE (TESTNET)
Timeline: weeks 1 - 6 | Budget: $7,000 (20%)
Core SEP Stack Implementation (Testnet)
Deploy Slimepay's core Stellar Anchor infrastructure on testnet using the Stellar Anchor Platform (SAP). Muhammad Jamil (Lead Blockchain Engineer) owns all SAP deployment, Business Server implementation, and reconciliation logic.
- SEP-10: Web Authentication — wallet session control via SAP
- SEP-12: KYC pipeline — Business Server proxying to Dojah
- SEP-24: Interactive withdrawal flow on testnet
- SEP-6: Programmatic transfer API on testnet
- SAP Business Server with full callback and JSON-RPC status management
- Stellar RPC + Payment Observer for ledger monitoring (Horizon as fallback)
- Public testnet Anchor endpoint live
Compliance & Infrastructure (Testnet)
- KYC/AML via SEP-12 + Dojah, sanctions screening
- Encrypted identity/user data in transit and at rest
- Secrets management, RBAC, audit logging
- Testnet/production environment separation
Completion Criteria
- Public testnet Anchor endpoint live and accessible
- All SEPs (10/12/24/6) passing SDF Anchor Validation Suite on testnet
- Architecture documentation published and reconciled with GitHub implementation
- SAP Business Server handling callbacks end-to-end on testnet
SAP Integration Hours (1+ Month per SAP Handbook)
- SAP testnet deployment (Muhammad Jamil) — 80 hrs @ $87.50/hr = $7,000: SAP Business Server setup, SEP-10/12/24/6 testnet implementation, Payment Observer integration, JSON-RPC status management, end-to-end testnet validation
Budget Breakdown
- SAP testnet deployment (80 hrs @ $87.50/hr): $7,000
- Total: $7,000
TRANCHE 2 (DELIVERABLE ROADMAP) - MERCHANT CHECKOUT + B2B API (TESTNET)
Timeline: weeks 7 - 13 | Budget: $10,500 (30%)
Merchant Checkout Gateway (Testnet)
All activity remains on testnet — no real funds move.
- SEP-24 hosted withdrawal flow (testnet)
- Stellar Wallets Kit integration for Freighter/Lobstr wallet connect (testnet)
- Public testnet checkout URL live
- 10+ merchants onboarded in sandbox environment
- Merchant dashboard for testnet transaction visibility
B2B Settlement API — SEP-31 (Testnet)
- SEP-31 B2B payment API (testnet)
- Webhook system for real-time settlement notifications
- JavaScript and Python SDKs
- Sandbox environment and full public API documentation at slimepay.com/docs
- At least 1 sandbox B2B integration live and tested
Threat Model & Security Monitoring Plan
- Memo mismatch / replay attacks — SAP-assigned memos with strict uniqueness validation; transaction replay protection in Settlement Engine
- Webhook spoofing — HMAC signature validation on all SAP webhook callbacks; invalid-signature events rejected
- KYC bypass attempts — SEP-12 KYC enforced at transaction initiation; no settlement proceeds without Dojah verification
- Rate manipulation — SEP-38 firm rate quotes with expiry; locked rate validated at settlement time
- Testnet credential leakage — strict testnet/production environment separation; no shared keys between environments
- Monitoring — all testnet transactions logged with full audit trail; webhook delivery failures alerted; failed KYC attempts logged; end-to-end latency tracked per transaction
Stellar Wallets Kit Hours (40 hrs — SCF Integration List)
- Stellar Wallets Kit integration — 40 hrs @ $87.50/hr = $3,500: wallet connection flows, Freighter/Lobstr compatibility, transaction signing, frontend integration, end-to-end testnet testing
Budget Breakdown
- Backend engineering: SEP-31 API, webhooks, SDKs (general): $3,500
- Stellar Wallets Kit integration (40 hrs @ $87.50/hr): $3,500
- Frontend checkout system (general UI, excl. Wallets Kit): $2,000
- Documentation & sandbox environment: $1,500
- Total: $10,500
TRANCHE 3 (DELIVERABLE ROADMAP) - SDP + OPEN-SOURCE DOCUMENTATION (TESTNET)
Timeline: weeks 14 - 18 | Budget: $14,000 (40%)
Stellar Disbursement Platform — SDP (Testnet)
- SDP batch payout engine integrated on testnet
- Parallel transaction execution (testnet simulation)
- Multi-partner batching logic tested and validated on testnet
- SDP scheduler operational in Slimepay's testnet environment
- Recipient claiming flow tested on testnet
Testnet Validation & Quality Assurance
- Full end-to-end testnet flow validated: wallet connect → SEP-24 withdrawal → SEP-31 B2B API → SDP batch payout
- 20+ simulated testnet transactions processed and documented
- All SEP endpoints passing SDF Anchor Validation Suite
Public Reporting & Open-Source Contribution
- Open-source NGN Anchor deployment guide published for Stellar ecosystem
- Public testnet metrics report: transaction count, endpoint performance, integration notes
Stellar Disbursement Platform Hours (40 hrs — SCF Integration List)
- SDP testnet integration — 40 hrs @ $87.50/hr = $3,500: batch payout orchestration on testnet, parallel settlement simulation, transaction reconciliation logic, monitoring hooks, retry handling, end-to-end testnet validation
Budget Breakdown
- SDP testnet integration (40 hrs @ $87.50/hr): $3,500
- End-to-end testnet validation & QA: $4,000
- Infrastructure optimisation (testnet environment hardening): $3,000
- Documentation & open-source Anchor guide: $3,500
- Total: $14,000
ONCHAIN METRICS (TESTNET)
- 20+ testnet transactions processed and verifiable on testnet.stellar.expert
- 3+ successful SDP batch operations executed and visible on testnet ledger
- All SEP endpoints (SEP-10/12/24/6/31) passing SDF Anchor Validation Suite
- Slimepay testnet Anchor address published and publicly accessible on testnet.stellar.expert
- All integration code committed and publicly verifiable at github.com/slimepay/stellar-anchor
Slimepay is a 5-person team operating a live payment product in Nigeria with 500+ registered users and 600+ transactions processed.
Lamine-cisse Ekezie — Founder & CEO
Product vision, partnerships, business development, and regulatory navigation. Nigerian fintech market expertise, identified and validated the NGN settlement gap through direct user research. Built Slimepay to 500+ live users bootstrapped without equity funding.
LinkedIn: https://www.linkedin.com/in/lamine-cisse-ekezie-a2b7851bb
Muhammad Jamil — Lead Blockchain Engineer
Named owner of SAP deployment, Business Server implementation, and reconciliation logic. Experienced in EVM and Stellar SDK. Responsible for all on-chain architecture, settlement engine, API infrastructure, webhook systems, and FX routing. Will own SEP-10/12/24/6/31 implementation and SDP integration.
LinkedIn: https://www.linkedin.com/in/jhmeel-mikail-824544306 | GitHub: https://github.com/jhmeel
Tammy Smith — Product Engineer
Merchant checkout UI, partner API dashboard, and user-facing payment flows. Currently maintains production UI/UX. Will build the SEP-24 interactive hosted withdrawal flow, Stellar Wallets Kit integration, and merchant integration module.
LinkedIn: https://www.linkedin.com/in/smith-francis-b62013374
Cynthia Imaobong Akpan — Marketing Lead
Growth, user acquisition, content, and community engagement. Drives community education, social engagement, and ambassador programs. Responsible for SCF ecosystem engagement and Stellar community presence.
LinkedIn: https://www.linkedin.com/in/cynthia-akpan-8a1a87263
Christian Divinefavour — Data Scientist & AI Engineer
Transaction monitoring, fraud detection logic, backend optimisation, and infrastructure reliability. Owns the monitoring and fraud detection layer critical for a live payment product.
LinkedIn: https://www.linkedin.com/in/christian-divinefavour
Lamine-cisse | Slimepay
By The Merchant Settlement Rail for Africa
NGN Stellar Anchor for Africa