PROPELOO

STABLECOIN / PEGGED ASSET INFRASTRUCTURE

Build the stable money layer your financial product needs.

PROPELOO engineers stablecoin systems — from fiat-backed reserve architecture and ERC-20 issuance contracts to crypto-collateralised CDP systems and the oracle infrastructure that keeps the peg. A stablecoin is not just a token. It is a monetary system with a peg mechanism, a reserve model, a liquidation engine and a regulatory structure. Every one of those components must be designed to hold under the exact market conditions when your users need stability most.

The peg mechanism you choose determines what happens when the market moves against you.

The history of stablecoin failures is a catalogue of peg mechanisms that worked in normal conditions and catastrophically failed under stress. LUNA/UST lost $40B in 72 hours because the algorithmic peg mechanism had a reflexivity flaw that made the depeg self-accelerating once it started. Iron Finance collapsed in hours via a bank run that the protocol had no mechanism to stop. Every stablecoin design looks stable in a spreadsheet. The question is what happens when 30% of supply tries to redeem simultaneously, when the oracle price deviates by 5%, when collateral assets decline 50% in a single day. PROPELOO designs stablecoin systems starting with the failure modes — not the happy path.

The full stablecoin engineering stack.

A stablecoin is not one contract. It is a system of contracts, oracle feeds, reserve infrastructure and compliance processes that must all function correctly simultaneously.

System Layers

  • Reserve & Collateral Layer: Fiat reserve management, crypto collateral custody, proof of reserve attestation, collateral ratio monitoring
  • Issuance & Redemption Layer: Mint/burn mechanics, redemption processing, collateral deposit/withdrawal, fee accounting
  • Peg Maintenance Layer: Oracle price feeds, stability fee adjustments, arbitrage incentives, peg deviation response
  • Liquidation Layer: Collateral ratio monitoring, liquidation triggers, liquidation auction mechanics, bad debt handling
  • Compliance & Reporting Layer: KYC/AML for institutional minting, reserve attestation, regulatory reporting, blacklist/freeze capabilities

Core Technical Capabilities

  • Fiat-backed Stablecoin

    1:1 fiat reserve model with ERC-20 issuance contract, minter role management, blacklist capability for regulatory compliance, proof of reserve integration and fiat banking infrastructure coordination.

  • Crypto-collateralised CDP System

    MakerDAO-style collateralised debt position system — collateral deposit vaults, stability fee accrual, debt ceiling management, oracle price feed integration and automated liquidation engine.

  • Oracle & Price Feed Infrastructure

    Chainlink price feed integration, TWAP oracle design, multi-source aggregation with deviation checks, circuit breakers for rapid price movements and fallback mechanisms for oracle failure.

  • Liquidation Engine

    Collateral ratio monitoring, liquidation threshold triggers, Dutch auction or fixed-discount liquidation mechanics, liquidation bonus calibration and bad debt socialisation mechanisms.

  • Cross-chain Stablecoin

    Canonical bridge architecture for multi-chain stablecoin deployment — lock-and-mint on secondary chains, unified total supply accounting, bridge security review and cross-chain oracle consistency.

  • Regulatory Compliance Architecture

    KYC/AML integration for institutional minting, OFAC sanctions screening, transaction monitoring, freeze/blacklist capabilities required by regulators, and reserve attestation for MiCA compliance.

How we think about stablecoin design.

A stablecoin is a promise. The peg mechanism is the contract that backs that promise. Every design decision must answer: what happens to this promise when everything goes wrong at once?

  • Collateral model determines failure mode

    Fiat-backed stablecoins fail via banking counterparty risk (see SVB/USDC). Crypto-collateralised stablecoins fail via collateral price crashes faster than liquidations can process. Algorithmic stablecoins fail via reflexive death spirals when confidence breaks. There is no risk-free collateral model — only transparent tradeoffs. We design for the failure modes you can accept, not the ones you pretend will not happen.

    Axiom:

  • Over-collateralisation is the price of stability

    A crypto-collateralised stablecoin that is 150% collateralised is inefficient with capital. That inefficiency is not waste — it is the buffer that absorbs a 33% collateral price decline without breaking the peg. Under-collateralised or algorithmically stabilised systems offer capital efficiency in exchange for catastrophic failure risk. The history of crypto is clear on which choice ends better.

    Axiom:

  • The liquidation engine must be faster than the market

    When ETH drops 40% in one hour, every under-collateralised CDP must be liquidated before the collateral value falls below the outstanding debt. If liquidations cannot clear fast enough — because gas prices spike, because liquidation bonuses are too small, because the auction mechanism is too slow — the protocol accumulates bad debt and the peg breaks. The liquidation design must be stress-tested against Black Thursday scenarios before mainnet.

    Axiom:

  • Regulatory compliance is architecture, not a checkbox

    MiCA requires stablecoin issuers to hold reserves in liquid, low-risk assets and publish monthly attestation reports. FinCEN requires AML compliance for USD-referenced stablecoins. VARA requires specific reserve and redemption guarantees for UAE issuance. These requirements must be designed into the contract architecture from the start — adding a blacklist function to a non-compliant contract after regulatory scrutiny begins is not compliance.

    Axiom:

The decisions that define your stablecoin.

Each choice carries a different risk profile, capital requirement and regulatory implication.

  • Collateral model?

    Impact: Fiat-backed stablecoins are the only model with a track record of surviving multi-year market cycles. Crypto-collateralised systems like DAI have also survived. Algorithmic models have an almost universal history of failure under market stress.

    • Fiat-backed (1:1 reserve) — most stable, requires banking, regulatory licensing, counterparty risk
    • Crypto-collateralised (over-collateralised CDP) — decentralised, capital inefficient, collateral crash risk
    • Commodity-backed (gold, real estate) — RWA tokenisation requirements, illiquid collateral
    • Algorithmic — capital efficient, highest failure risk, avoid unless mechanism is formally verified
  • Peg mechanism?

    Impact: Peg mechanisms that rely on market participant rationality fail when panic supersedes rational arbitrage. Direct redemption is the only mechanism that holds under all market conditions.

    • Direct redemption (fiat-backed) — 1:1 USD redemption, strongest peg, requires fiat banking
    • Arbitrage incentive (CDP) — stability fee + DSR encourages DAI price to return to $1
    • Protocol-controlled stability fund — buy/sell pressure via treasury to defend peg
    • Algorithmic seigniorage — mint/burn secondary token to expand/contract supply, highest risk
  • Collateralisation ratio (CDP systems)?

    Impact: The collateralisation ratio must account for worst-case collateral price drops AND the time required to process liquidations at peak gas prices. Black Thursday 2020 demonstrated that 150% is insufficient for pure ETH collateral without circuit breakers.

    • 110% — capital efficient, razor-thin liquidation margin, requires fast liquidators
    • 150% — MakerDAO ETH standard, absorbs ~33% collateral decline before bad debt
    • 200% — very conservative, low capital efficiency, appropriate for volatile collateral
    • Dynamic (risk-adjusted per collateral type) — most sophisticated, each asset has appropriate ratio
  • Oracle design?

    Impact: Oracle failure or manipulation has caused more stablecoin depegs than contract bugs. Chainlink with a TWAP fallback and deviation circuit breakers is the minimum for a production stablecoin.

    • Chainlink price feeds — industry standard, audited, manipulation resistant
    • TWAP from on-chain pools — manipulation resistant over time, lags spot price
    • Multi-source (Chainlink + TWAP + fallback) — maximum robustness, highest complexity
    • Centralised oracle — fast, controllable, single point of failure and manipulation
  • Redemption model?

    Impact: Redemption design determines run dynamics. Instant redemption creates bank run risk but maximum user trust. Delayed redemption slows bank runs but reduces confidence. The model must match your reserve liquidity profile.

    • Instant 1:1 redemption (fiat-backed) — highest trust, requires liquid fiat reserves
    • Delayed redemption (1-3 business days) — allows reserve management, reduces bank run speed
    • CDP closure (crypto-collateralised) — pay back debt + stability fee, get collateral back
    • AMM-based exit (algorithmic) — exit via market, no guaranteed price
  • Regulatory approach?

    Impact: Operating without regulatory compliance in major markets creates existential risk as enforcement increases. MiCA is now live in the EU — any stablecoin targeting EU users must be compliant.

    • MiCA (EU) compliant — e-money token or asset-referenced token classification, reserve requirements
    • FinCEN MSB registration (US) — money transmitter licensing, AML programme required
    • VARA (UAE) — specific stablecoin regulations, reserve and redemption requirements
    • Offshore jurisdiction — lower regulatory burden, restricted market access, reputational risk

What PROPELOO builds.

  • USD-backed Stablecoin

    Fiat-backed ERC-20 stablecoin with custodian integration, minter role management, blacklist compliance capability, proof of reserve and MiCA/FinCEN compliance architecture.

  • CDP Stablecoin Protocol

    MakerDAO-style collateralised debt position system — multi-collateral vault, stability fee, debt ceiling, oracle integration and automated liquidation engine.

  • Cross-chain Stablecoin

    Multi-chain stablecoin with canonical bridge, lock-and-mint mechanics, cross-chain total supply accounting and unified oracle infrastructure.

  • Corporate Treasury Stablecoin

    Enterprise stablecoin for internal treasury management — permissioned transfer, KYB-gated minting, multi-sig governance and integration with existing financial systems.

  • Commodity-backed Stablecoin

    Gold or commodity-referenced stablecoin with RWA tokenisation layer, custodian integration, proof of physical reserve and redemption for underlying asset.

  • Stablecoin Payment Infrastructure

    Stablecoin-based payment rail with merchant integration, automated settlement, volatility protection and on-ramp/off-ramp fiat connectivity.

The stablecoin engineering stack.

Reserve infrastructure, smart contracts, oracle integration and compliance tooling are all required components.

  • Smart Contracts

    Stack: Solidity 0.8+, OpenZeppelin ERC-20, MakerDAO DSS (reference), Foundry (fuzz testing), Echidna (invariant testing)

  • Oracle Infrastructure

    Stack: Chainlink Data Feeds, Chainlink CCIP, Pyth Network, API3, Custom TWAP Oracle

  • Reserve & Custody

    Stack: Fireblocks (institutional custody), Copper, Circle API (USDC backing), AWS CloudHSM, Proof of Reserve integration

  • Compliance

    Stack: Chainalysis KYT, Elliptic, Sumsub (KYC/KYB), ComplyAdvantage, OFAC sanctions API

  • Cross-chain

    Stack: Chainlink CCIP, LayerZero, Axelar, Wormhole, Custom bridge contracts

  • Monitoring

    Stack: Tenderly, OpenZeppelin Defender, Datadog, Prometheus, Custom peg deviation alerting

Stablecoin security is systemic, not contractual.

The most catastrophic stablecoin failures were not smart contract bugs. They were systemic design flaws that no code audit would have caught.

  • Depeg Scenario Modelling

    Every stablecoin design must be stress-tested against: 40% collateral decline in 24 hours, 30% of supply attempting simultaneous redemption, oracle price deviation of 5-10%, and liquidity provider exit during market panic. These scenarios must be modelled before deployment, not discovered during the first market crisis.

  • Oracle Manipulation

    A stablecoin whose peg is determined by an oracle that can be manipulated is a stablecoin that can be broken. Flash loan price manipulation, oracle latency exploitation and multi-block price manipulation are all active attack vectors. TWAP oracles, multi-source aggregation, deviation thresholds and circuit breakers are required for any stablecoin where oracle price determines minting or liquidation.

  • Liquidation Cascade Prevention

    When collateral prices decline rapidly, multiple CDPs become under-collateralised simultaneously. If liquidators cannot process them fast enough — due to gas price spikes or insufficient liquidation bonuses — the protocol accumulates bad debt. Circuit breakers, emergency collateral ratio adjustments and protocol-owned liquidity for backup liquidation are required safeguards.

  • Reserve Counterparty Risk

    Fiat-backed stablecoins hold reserves at banks. SVB's collapse caused USDC to depeg because $3.3B of reserves were at risk. Reserve diversification across multiple banking partners, real-time reserve monitoring and clear communication protocols for banking disruptions are required components of a fiat-backed stablecoin architecture.

  • Governance Attack Prevention

    Stablecoin governance contracts that can change collateral parameters, debt ceilings or oracle addresses are governance attack targets. Flash loan governance attacks, whale-controlled parameter changes and timelock bypasses can destabilise a stablecoin through its governance layer. Multi-sig governance with timelocks on parameter changes is the minimum safeguard.

  • Compliance & Regulatory Risk

    Operating a stablecoin without the appropriate regulatory approvals creates existential legal risk as enforcement increases globally. MiCA enforcement began in 2024. FinCEN enforcement against unlicensed MSBs is active. Building compliance into the architecture from day one — blacklist capability, KYC-gated minting, reserve attestation — is significantly cheaper than retrofitting compliance after a regulatory notice.

From design to live stablecoin system.

  1. 01. Mechanism Design

    Collateral model selection, peg mechanism design, collateralisation ratio analysis, failure mode modelling and regulatory structure review.

  2. 02. Oracle Architecture

    Price feed design, manipulation resistance analysis, TWAP parameters, circuit breaker thresholds and fallback mechanism specification.

  3. 03. Contract Development

    Core stablecoin contracts, CDP vault system, liquidation engine, governance contracts and cross-chain bridge (if applicable).

  4. 04. Invariant Testing

    Echidna property testing for all peg invariants, Foundry fuzz testing for liquidation edge cases, and stress scenario simulation on mainnet forks.

  5. 05. Security Audit

    Internal security review plus third-party audit from a DeFi-specialised firm. Economic model review from a mechanism design perspective.

  6. 06. Compliance Integration

    KYC/AML integration, OFAC screening, reserve attestation API, regulatory reporting infrastructure and blacklist capability implementation.

  7. 07. Launch & Monitoring

    Staged deployment with initial supply cap, real-time peg monitoring with automated alerts, oracle health monitoring and incident response playbooks for depeg scenarios.

Stablecoin platforms we have shipped to production.

Three stablecoin systems handling real issuance, redemption, and cross-border flows.

  • USD-pegged stablecoin with permissioned mint/burn and multi-chain deployment

    Challenge: FinTech client needed a USD-pegged stablecoin for cross-border B2B payments with permissioned issuance (only verified institutions can mint), automatic reserve attestation, and deployment across three chains.

    Architecture: ERC-20 with permissioned mint/burn roles, operator whitelist, blacklist for AML compliance, Chainlink proof-of-reserve oracle for automated reserve attestation, LayerZero bridge for cross-chain transfer.

    Outcome: $180M total supply issued, deployed on 3 chains, monthly reserve attestation automated, zero audit findings on mainnet.

  • Over-collateralised stablecoin with liquidation engine and stability fee

    Challenge: DeFi protocol needed an over-collateralised stablecoin (similar to DAI) with a risk-adjusted collateral framework, liquidation auction engine, and stability fee governance.

    Architecture: CDP (Collateralised Debt Position) system: users lock collateral and mint stablecoin up to a collateral ratio (e.g., 150%). Chainlink price feeds trigger liquidation when ratio falls below minimum. Dutch auction liquidation engine. Stability fee accrues to protocol treasury.

    Outcome: Peak $45M TVL, 0 bad debt events, liquidation engine cleared 3 large positions during market stress without protocol loss.

  • T-bill backed yield stablecoin with rebasing mechanism and redemption engine

    Challenge: Asset manager client needed a yield-bearing stablecoin backed by US T-bills where holders automatically accrue yield via token rebasing — without requiring holders to claim or stake.

    Architecture: ERC-4626 vault wrapping tokenised T-bills, daily oracle update triggers rebase, yield distributed proportionally to all holders via share-based accounting. Instant redemption for amounts under liquidity buffer, 24h settlement for larger redemptions.

    Outcome: 6.2% APY distributed to holders, $22M in assets under management, regulatory opinion received in two jurisdictions.

Frequently Asked Questions

What type of stablecoin should we build?

Fiat-backed (USDC model) is the safest choice for regulated financial products — it is predictable, auditable and has proven stability. Crypto-collateralised (DAI model) is appropriate for DeFi-native applications where decentralisation matters and users accept capital inefficiency. Algorithmic models have an almost universal history of failure under market stress and should only be considered with formally verified mechanisms and experienced DeFi economists.

What does MiCA require for stablecoins?

MiCA (Markets in Crypto-Assets regulation, live in EU since 2024) classifies stablecoins as either e-money tokens (pegged to a single fiat currency) or asset-referenced tokens (pegged to multiple assets or commodities). EMTs require an e-money licence or credit institution authorisation, 1:1 reserve in liquid assets, right of redemption at par at any time, and monthly reserve attestation. Issuers with significant volume face additional requirements including interoperability standards and volume caps.

How does the liquidation mechanism work?

In a CDP stablecoin, when a vault's collateral value falls below the liquidation threshold, the vault is eligible for liquidation. A liquidator repays the outstanding stablecoin debt and receives the collateral at a discount (the liquidation bonus). The discount incentivises liquidators to act quickly. Dutch auction liquidation (as in MakerDAO's Liquidation 2.0) starts at a high discount and decreases over time, finding the market-clearing price. Liquidation bonuses must be calibrated: too low and liquidators won't act; too high and liquidation cascades accelerate collateral price declines.

How do you maintain the peg?

In fiat-backed stablecoins, the peg is maintained by the guaranteed 1:1 redemption mechanism — rational actors will always arbitrage a deviation back to $1 because they can redeem at par. In CDP stablecoins, the stability fee (borrowing cost) and the DSR (deposit/savings rate) create supply and demand incentives that push the price toward $1. Above $1: stability fee increases to reduce minting demand. Below $1: DSR increases to incentivise holding. These are soft mechanisms — they fail when panic overrides rational arbitrage.

What banking infrastructure is needed for a fiat-backed stablecoin?

Fiat-backed stablecoin infrastructure requires: a banking partner willing to hold reserves (increasingly difficult to find), a custodian for reserve assets if investing in short-term Treasuries, a reserve attestation firm for regular audits, an API for real-time reserve verification, and money transmitter licensing in operating jurisdictions. The banking relationship is often the hardest part of launching a fiat-backed stablecoin — banks are cautious about crypto clients and the onboarding process can take months.

Can you build a stablecoin on multiple chains?

Yes. The standard architecture is: a canonical chain where minting and burning happens (usually Ethereum), with lock-and-mint bridges to secondary chains. The total supply across all chains equals the total minted on the canonical chain. Bridge security is the critical risk — the majority of the largest DeFi hacks have been bridge exploits. We use audited, established bridge infrastructure (Chainlink CCIP, LayerZero) rather than custom bridge contracts.

What is proof of reserve and do we need it?

Proof of reserve is the on-chain or publicly verifiable demonstration that the stablecoin's reserve assets match the total outstanding supply. It is required by MiCA for regulated stablecoins, expected by institutional users and increasingly expected by sophisticated retail users after the USDC/SVB incident highlighted reserve counterparty risk. We integrate Chainlink Proof of Reserve or equivalent attestation infrastructure as a standard component of fiat-backed stablecoin builds.

How long does it take to build a stablecoin?

A fiat-backed stablecoin contract (ERC-20 with minter roles and compliance features): 3–4 weeks. A full CDP stablecoin system (vault contracts, oracle integration, liquidation engine, governance): 3–5 months. Cross-chain deployment adds 4–8 weeks per chain. Banking and regulatory setup — the parts outside the code — typically take 3–9 months and should start before contract development begins.