invarians 0.2.0

Python SDK for the Invarians panel API — direction-agnostic cross-chain attestations (L1, L2, bridges) for autonomous agents

invarians-py

Invarians makes invisible blockchain infrastructure failures observable — before they show up in gas fees.

L2 activity no longer shows up in L1 gas fees. Sequencer failures and bridge delays leave no economic trace. Fee monitors stay silent. Invarians detects them.

from invarians import InvariansClient

client = InvariansClient(api_key="inv_your_key_here")
ctx = client.get_execution_context(l1="ethereum", l2="arbitrum")

l2 = ctx.proof.l2_regime or ""
if ctx.proof.l1_regime.startswith("S2") or l2.startswith("S2"):
    # Structural stress detected — L1, L2, or both
    # Invisible to fee monitors
    pause_agent_execution()

print(ctx.proof.pattern_key)   # "S1D1×S1D2×BS1"
print(ctx.is_actionable())     # True

---

Install

pip install invarians[requests]  # default
pip install invarians[httpx]     # async-friendly

Requires Python 3.9+. Get an API key at invarians.com.

---

What you can do with it

1. Pause execution when infrastructure degrades

ctx = client.get_execution_context(l1="ethereum", l2="arbitrum")

if ctx.proof.l1_regime.startswith("S2"):
    # Structural stress detected — hold until nominal
    return {"action": "hold", "reason": ctx.proof.l1_regime}

2. Detect silent failures (S2D1)

S2D1 is the critical regime: structural stress with no demand signature. A fee monitor reports normal while Invarians detects degradation.

att = client.get_l1("ethereum")

if att.regime == "S2D1":
    # Chain slowing — no gas spike, no price move
    # Nothing shows on any fee monitor
    alert_ops("S2D1 detected on Ethereum")

3. Certify execution conditions

Attach a signed attestation to every agent action for audit or dispute resolution.

ctx = client.get_execution_context(l1="ethereum", l2="arbitrum")

if ctx.is_actionable():
    result = execute_trade(...)
    audit_log.append({
        "tx": result.hash,
        "execution_context": ctx.proof.pattern_key,   # "S1D1×S1D1×BS1"
        "attestation": ctx.signature,
        "issued_at": ctx.l1.issued_at,
    })

4. Adjust routing on bridge stress

ctx = client.get_execution_context(l1="ethereum", l2="arbitrum")

if ctx.proof.bridge_state == "BS2":
    # Bridge degraded — route via alternative path
    use_fallback_bridge()
elif ctx.proof.l2_regime == "S1D2":
    # L2 demand elevated — expect higher fees
    # Note: l2_regime differentiation active from 25 Apr 2026
    adjust_slippage_tolerance(factor=1.3)

5. Handle stale data gracefully

att = client.get_l1("ethereum")

match att.stale_action:
    case "ok":
        proceed()
    case "caution":
        proceed_with_reduced_size()
    case "wait":
        hold()   # Data > 2h old — do not act

---

Regimes

Code	Structure	Demand	What it means
S1D1	nominal	nominal	Infrastructure within calibrated norms
S1D2	nominal	elevated	Structurally sound, demand above baseline
S2D1	stress	nominal	The only regime where the chain degrades silently — no gas spike, no price signal. Invisible to gas monitors.
S2D2	stress	elevated	Structural stress and elevated demand simultaneously

---

Signal quality

Every response carries explicit calibration metadata. The SDK never hides uncertainty.

att = client.get_l1("solana")

print(att.meta.m1_validated)            # False — backtest not yet validated
print(att.meta.calibration_confidence)  # "LOW"
print(att.meta.notes)                   # "π not calibrated. τ only."
print(att.is_actionable())              # False

Chain coverage

Chain	Layer	Confidence	Ready
ethereum	L1	MEDIUM	✅
polygon	L1	MEDIUM	✅
arbitrum	L2	LOW	⏳ 25 Apr 2026
base	L2	LOW	⏳ 25 Apr 2026
optimism	L2	LOW	⏳ 25 Apr 2026
solana	L1	LOW	⏳ July 2026
avalanche	L1	NONE	⏳ July 2026

L2 calibration status — l2_regime is architecturally S1D1 on all active rollups (τ dormant on sequencer-based chains, π baselines converging). Full L2 + bridge signal calibration scheduled 25 April 2026. Implementation and testing are functional today.

---

Error handling

from invarians.exceptions import AuthError, RateLimitError, ServerError

try:
    att = client.get_l1("ethereum")
except AuthError:
    print("Invalid API key")
except RateLimitError:
    print("Quota exceeded — free tier: 20 req/day")
except ServerError as e:
    print(f"Service unavailable: {e}")

---

Verify an attestation

ctx = client.get_execution_context(l1="ethereum", l2="arbitrum")
valid = client.verify({"attestation": ctx.l1.__dict__, "signature": ctx.signature})
print(valid)  # True

---

Documentation

API reference: invarians.com/developers.html

---

License

MIT