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Aurora Stack / Sundown

Sundown bringsverified discoveryto P2P credit markets.

Built with Sundial, Sundown adds identity proofs, compliance indexing, and lender-side filtering to Cardano P2P lending infrastructure - without rebuilding the lending rails.

View ArchitectureExplore Pilot
Built with SundialIdentity proof metadataCompliance indexerLender filteringReference frontend

Market signals: 412 indexed loan requests, Veridian issuer checks, KYC-ZK proof metadata, EU jurisdiction filters, Lender-defined rules, Base contracts unchanged

sundown.fairway / market
indexer live

Lender Filter

Verified only

Issuer

Veridian +2

Proof

KYC-ZK

Region

EU / US

LTV

≤ 65%

Verified opportunities

3 of 412 indexed

Loan Request #4291verified

Amount

10,000 ADA

Collateral

BTC / ADA

Term

6 mo

KYC-ZK proofEU jurisdictionmeta v1
#42874,200 ADA
KYB
#426218,500 ADA
Accred

Cardano tx metadata

label: 1967 · proof_type: kyc_zk · issuer: veridian

What Sundown Is

A verification and discovery layer for P2P credit markets.

Sundown is the Fairway × Sundial layer that makes Cardano P2P credit markets discoverable, filterable, and suitable for verified participation. It adds identity-proof metadata, compliance indexing, lender-side filtering, and reference frontend components around existing lending infrastructure.

01

Credit-market discovery layer

Sundown surfaces compatible on-chain loan opportunities so lenders can browse and evaluate verified credit markets.

02

Compliance-aware indexer

Sundown parses loan metadata, verifies identity proofs, checks issuer status and expiration, and exposes filtered market views.

03

Lender filtering interface

Lenders can define accepted proof types, issuers, jurisdictions, and eligibility criteria before viewing opportunities.

04

Identity-proof metadata standard

Borrowers can attach verifiable identity or eligibility proofs to loan requests without changing the base lending contracts.

05

Reference frontend for verified P2P lending

Sundown includes UI components for borrowers, lenders, proof display, loan discovery, and compliance-aware dashboards.

06

Fairway × Sundial partnership layer

Sundown connects Fairway's identity and verification capabilities with Sundial's Bitcoin-backed lending infrastructure.

Architecture note

Sundown works around compatible P2P lending infrastructure. The base lending rails handle loan requests, collateral, repayment, and default logic. Sundown adds discovery, indexing, proof verification, and lender filtering around that market.

The Problem

The identity gap in P2P credit.

P2P lending creates direct borrower-lender relationships and on-chain credit history. But pseudonymous reputation alone is not enough for institutional lenders, regulated funds, and professional capital allocators.

Permissionless P2P market

Open access · pseudonymous · on-chain

identity gap

Institutional capital blocked

Mandates · KYC · jurisdiction · eligibility

Sundown closes this gap

Pseudonymous history is useful, but incomplete

On-chain repayment behavior tells part of the story. Institutional underwriting needs more than a wallet's track record.

Institutions cannot lend into fully anonymous markets

Funds, banks, and regulated allocators face mandates that disqualify pseudonymous counterparties before any credit analysis begins.

KYC/AML checks cannot be optional for regulated capital

Compliance is not a feature flag for these participants. It is a precondition for deploying balance-sheet capital.

Compliance belongs at the edge, not in every contract

Embedding KYC inside base validators fragments liquidity and breaks open markets. The verification has to live alongside, not inside.

The Approach

Identity at the edge. Liquidity stays shared.

Sundown adds verification and filtering around existing P2P lending infrastructure without changing the base contracts. Lenders who need compliance filter for valid proofs. Lenders who do not still access the full unfiltered market.

  1. Step 01

    Borrower

    Holds verifiable credentials

  2. Step 02

    Loan Request

    Published to base market

  3. Step 03

    Identity Proof Metadata

    Attached as structured tx metadata

  4. Step 04

    Compliance Indexer

    Parses, validates, exposes API

  5. Step 05

    Lender Filter

    Issuer · proof · jurisdiction

  6. Step 06

    Verified Market View

    Eligible loans surface to lenders

Proofs ride beside the transaction · Base contracts unchanged

Architecture

How Sundown fits into the lending stack.

Three clearly bounded layers. Sundown is the middle one - it does not own the base market and it does not own credential issuance.

Layer 01

On-chain

Base P2P Lending Infrastructure

Provider · Cardano · Compatible P2P lending contracts · Sundial stack

Sundown consumes, not builds.

    Handles

  • Loan request publication
  • Collateral management
  • Repayment logic
  • Default handling
Sundown

Layer 02

Interface

Sundown Identity Extension Layer

Provider · Fairway × Sundial

Sundown builds identity, discovery, indexing, and filtering.

    Handles

  • Identity proof metadata standard
  • Compliance indexer
  • Lender filtering interface
  • Reference frontend components

Layer 03

External

Identity & Verification Providers

Provider · Fairway · Beam Wallet · Veridian-aligned credentials · Issuers

Sundown integrates and verifies, not stores raw data.

    Handles

  • KYC credentials
  • Jurisdiction checks
  • Legal entity credentials
  • Role credentials & ZK proofs

Boundaries

No validator changes. No extra lending logic.

Sundown lives next to the base market. The bands below show what runs where - and who is responsible for each.

Untouched by Sundown

On-chain · Base market

  • Loan requests
  • Collateral
  • Repayment
  • Liquidation / default handling

Built by Fairway × Sundial

Off-chain · Sundown layer

  • Identity verification
  • Extended metadata standard
  • Compliance indexing
  • Lender filtering
  • Verified frontend views

Integrated, not owned

External

  • Identity issuance
  • BTC bridges
  • Partner lending infrastructure

“Proofs ride beside the transaction. They do not rewrite the lending protocol.”

Metadata Flow

How identity proofs attach to loan requests.

Proofs travel with the transaction as structured Cardano metadata. The indexer reads them, validates issuer and expiry, and exposes a queryable surface for lender frontends.

  1. 01
    Borrower obtains credential
  2. 02
    Borrower creates loan request
  3. 03
    Borrower attaches proof metadata
  4. 04
    Transaction is published
  5. 05
    Indexer parses metadata
  6. 06
    Indexer verifies issuer & expiration
  7. 07
    Lender sees eligible loan in filtered view
tx metadata · label 1967
illustrative
{
  "proof_type":     "kyc_zk",
  "issuer":         "recognized_provider",
  "proof_payload":  "zk_proof_hash",
  "expires_at":     <timestamp>,
  "schema_version": "v1"
}

Schema is illustrative for this product page. Final production schema is defined alongside Sundial and ecosystem partners.

Lender Filtering · Interactive

Lenders choose the rules they trust.

Sundown does not impose one compliance policy. Lenders define which proof types, issuers, jurisdictions, and borrower attributes they accept. Toggle filters below to see the verified market reshape in real time.

Lender Console
Indexer healthy6 verified · 8 indexed

Results

Showing 2 of 8
  • #4291
    Amount10,000 ADA
    CollateralBTC / ADA
    APR8.42%
    LTV62%
    Duration6 mo
    KYC-ZK
  • #4244
    Amount32,000 ADA
    CollateralBTC
    APR7.18%
    LTV48%
    Duration12 mo
    KYC-ZK

Try toggling Verified only off to see the unfiltered market — Sundown does not impose one policy.

Borrower

Borrow with proofs, not repeated paperwork.

Borrowers reuse credentials and attach proofs to loan requests without exposing unnecessary personal data to every lender. Verified access. Privacy preserved.

One credential. Many loan requests.

A borrower verifies once with a credential issuer. From there, attaching a proof to a new loan request takes one tap. Lenders see an attestation, not a stack of personal documents.

  • Selective disclosure - reveal only what's needed.
  • Reusable across compatible verified markets.
  • No raw documents stored on Sundown's side.
New Loan RequestReady to publish
Amount
10,000 ADA
Collateral
BTC / ADA
Duration
6 months
Proof attached
KYC verified
Jurisdiction
Eligible
Data revealed
Minimal
Status
Indexed

Pilot

Pilot targets and measurable outcomes.

A focused pilot, not a treasury proposal. The goal is shipped infrastructure, signed-up lenders, and an integration standard others can reuse.

50+

loans with identity verification through Sundown

10

participating lenders, including institutions and verified individuals

5

pilot partners integrated with the regulated frontend

OSS

React/Next.js reference components, open-source

Spec

compliance filtering indexer specification

Std

identity proof integration standard

Milestones

Indicative sequence

  1. M1

    Architecture & base integration

  2. M2

    Verification system & testnet

  3. M3

    Frontend prototype & identity integration

  4. M4

    Indexer & filtering service

  5. M5

    Pilot preparation

  6. M6

    Mainnet identity layer launch

Reuse

Reusable infrastructure for Cardano credit markets.

Sundown produces patterns, specs, and components that other teams in the ecosystem can adopt. Identity extension is built once, used many times.

Institutional lenders

Filter and underwrite against verified borrower pools.

Identity providers

Plug issuers into a shared metadata standard.

Regional lending platforms

Compose jurisdiction-specific compliance views.

Credit market builders

Adopt the indexer spec and reference frontend.

Partner frontends

Embed verified discovery into existing UIs.

Risk & Boundaries

Clear boundaries. Lower integration risk.

Each known risk has a defined mitigation. Sundown does not pretend to handle everything - it draws the line clearly so partners know what they own.

Identity issuer risk

Mitigation

Multi-issuer support and transparent issuer criteria.

Base contract dependency

Mitigation

Build against open-source prototype contracts and equivalent P2P models.

Integration timing

Mitigation

Test identity extensions before full base-layer production rollout.

Compliance responsibility

Mitigation

Sundown provides tools. Participants decide which proofs and policies they accept.

FAQ

Quick answers about scope.

Sundown's value is in what it does andwhat it doesn't. These are the questions partners ask first.

What is Sundown?
Sundown is the Fairway × Sundial discovery, compliance indexer, lender filtering, and identity-proof layer for P2P credit markets on Cardano.
Is Sundown the same as Aurora?
No. Aurora is the full Bitcoin-backed credit-market stack. Sundown is one layer inside Aurora.
Does Sundown replace Sundial?
No. Sundown is built with Sundial and works with Sundial's lending infrastructure. It does not replace the base lending stack.
Does Sundown change Cardano lending contracts?
No. Sundown attaches identity proofs as metadata and verifies them off-chain through an indexer. Base contracts remain unchanged.
Does Sundown store personal data?
No. Sundown is designed around proof verification, selective disclosure, and indexer-based validation. Sensitive personal data remains with issuers or credential holders.
Can lenders define their own compliance rules?
Yes. Lenders can filter opportunities based on proof types, issuers, jurisdiction, and other eligibility criteria.
Is participation permissionless or permissioned?
The base market can remain permissionless. Sundown adds verified views and filtering for participants who require compliance.

Get Involved

Build verified credit markets without fragmenting liquidity.

Sundown brings identity proofs, compliance indexing, and lender-side filtering to P2P lending infrastructure on Cardano.

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