FCC Reference

Flare Confidential Compute (FCC) is the Trusted Execution Environment (TEE) protocol on Flare. On-chain it is one EIP-2535 diamond, FlareTeeManager.

Call the diamond at the FlareTeeManager address. IFlareTeeManager is the aggregate interface for that address.

This reference documents five of the facet ABIs it inherits:

• IExtensionManager — register and configure Flare Compute Extensions;
• IMachineManager — TEE machine registration and lifecycle;
• IVerification — TEE machine attestation and availability checks;
• IOperationFees — per-instruction fees for TEE operations;
• IOwnerAllowlist — allowlists for extension, machine, and wallet project owners.

It also documents ITeeCommonErrors — shared custom errors inherited by the diamond ABI and several facets.

Facet interfaces are compile-time views of the same diamond — they have no extra deployment.

info

FCC smart contracts are available on Coston2 and Coston today. They will be available on other Flare networks soon. Resolve FlareTeeManager at runtime through the FlareContractRegistry rather than hardcoding addresses once deployed on mainnet.

Deployed Contracts

Flare Testnet Coston2

Contract	Address
FlareTeeManager	0x1a9C4A0f9D76c0b1D91d22E24E573a9b377618aE

Songbird Testnet Coston

Contract	Address
FlareTeeManager	0xc4885998f5D792ed88C5Af7a3AaCBe333f017658

Songbird Canary-Network

Contract	Address
FlareTeeManager	—

Flare Mainnet

Contract	Address
FlareTeeManager	—

Interfaces

IFlareTeeManager

Aggregate public interface for the FlareTeeManager diamond.

IExtensionManager

Register and configure Flare Compute Extensions.

IMachineManager

TEE machine registration and lifecycle.

IVerification

TEE machine attestation and availability checks.

IOperationFees

Per-instruction fees for TEE operations.

IOwnerAllowlist

Allowlists for extension, TEE machine, and wallet project owners.

ITeeCommonErrors

Shared custom errors for FlareTeeManager facet interfaces.