USDSOQ Stablecoin

USDSOQ is a native L1 stablecoin issued directly on the Soqucoin blockchain. Unlike ERC-20 stablecoins that inherit the security properties (and quantum vulnerabilities) of their host chain, USDSOQ transactions are secured by ML-DSA-44 signatures from genesis. Patent pending (Soqucoin Labs Inc.).

Why a Native L1 Stablecoin?

Over $280 billion in stablecoin value sits on chains secured by ECDSA. When quantum computers can break ECDSA, every stablecoin on Ethereum, Solana, Tron, and other chains is at risk.

USDSOQ removes this attack surface by existing natively on a post-quantum chain. No wrapping, no cross-chain exposure.

How It Works

USDSOQ uses a multi-authority governance model with four consensus-enforced operations:

Opcode	Hex	Operation
OP_USDSOQ_MINT	0xf4	Authorized mint of new USDSOQ
OP_USDSOQ_BURN	0xf5	Authorized burn (redemption)
OP_USDSOQ_FREEZE	0xf6	Freeze an address (compliance)
OP_USDSOQ_ROTATE	0xf7	Rotate authority keys

All four operations require signatures from authorized keys. The authority set is tracked on-chain with consensus enforcement.

Supply Invariant

The consensus layer enforces a strict supply invariant:

sum(all_mints) - sum(all_burns) == current_circulating_supply

Every node independently validates this. No mint can occur without a valid authority signature, and no burn can create supply out of thin air. The invariant is checked at block validation time.

Multi-Asset UTXO Model

USDSOQ uses the same UTXO model as native SOQ but with an additional nAssetType field:

Asset Type	Value	Description
0x00	SOQ	Native coin
0x01	USDSOQ	USD stablecoin

Both asset types can exist in the same block, same transaction outputs, and same wallet. They share the same quantum-resistant address space.

Activation

Network	Status
Regtest	ALWAYS_ACTIVE
Stagenet	Active, with block-level enforcement (shipped in v1.6.0)
Mainnet	Not active (pending Halborn Phase 2 audit)

USDSOQ runs today on stagenet, where the supply invariant and authority rules are enforced at block validation. It is not yet active on mainnet.

Relationship to SOQ-TEC Gateway

USDSOQ will be available for cross-chain transfer through the SOQ-TEC Gateway, allowing holders to move between the Soqucoin L1 and other ecosystems while maintaining quantum-safe custody on the native chain.

Consensus Integration

USDSOQ operations are dispatched through witness version 5 in VerifyScript() → EvalScript(), following the same pattern as all other Soqucoin custom opcodes.