Infrastructure

Post-Quantum, by Default

Every PaymentOffer and PaymentProof carries an explicit signature_alg. Dilithium is the default. Falcon and SPHINCS+ are first-class. When NIST adds a Round-4 winner, the registry adds an entry.

Play PQ scene →

Algorithms

Three Options

Choose the right tradeoff for your use case: balanced, compact, or maximum security.

Dilithium3

default

NIST Level3

Public key1,952 B

Signature3,293 B

Sign time0.3 ms

Verify time0.1 ms

Best forgeneral use

Falcon-512

compact

NIST Level1

Public key897 B

Signature666 B

Sign time0.5 ms

Verify time0.07 ms

Best forbandwidth

SPHINCS+-256f

conservative

NIST Level5

Public key64 B

Signature49,856 B

Sign time~180 ms

Verify time5 ms

Best formax security

Code

Quick Start

# two-line PQ signing on a payment offer
from switchboard import PaymentOffer
from switchboard.pq import sign, ALG_DILITHIUM3

offer = PaymentOffer(
    pay_to="0xYourTreasury...",
    asset="0x036Cb...e7e",
    network="base-sepolia",
    amount="1000",
    signature_alg=ALG_DILITHIUM3,
)
offer.signature = sign(offer.canonical(), pq_key)