Function FBTC

function-fbtc

bridge

Function (FBTC): tokenized BTC across EVM ecosystems. Backed by Galaxy Digital + Antalpha + Mantle ($10M seed, Jul 2025). Documentation references audited reserves; specific smart-contract audit report not located via public search. DefiLlama registers chains as Bitcoin.

aggregate

5.45 / 10

contract risk2.00

liquidity risk9.50

centralization risk4.50

oracle risk5.00

on-chain attestation

signer0x742812a2Ff08b76f968dffA7ca6892A428cAeBb1

trace hash0x7c1e1428f1bc66082c0d0bfd5c27379fbf4820f3cb8e7152ab946b6e1fc0ed9e

timestamp2026-06-15T04:01:38.000Z

protocol0x5af464eb3044aaca81a8b9d2ee54d64b05dec466

oracle0x998ceb700e57f535873d189a6b1b7e2aa8c594eb

In production, the signer is derived from an Intel TDX enclave on Phala Cloud. In local-dev mode (current), the signer is a fixed attested-EOA fallback. The on-chain attestation flow is identical either way.

mantle-native exposure

No transitive LST / bridge / stable exposure on Mantle.

FBTC IS the bridge / tokenized-BTC issuer; its exposure is to the off-chain BTC custody chain (Antalpha) rather than to a third-party bridge.

This is the Mantle-native composition component — multi-chain risk scorers don't model these dependencies. It's already factored into the aggregate score above (15% weight); breakdown above shows the 4 on-chain components, this section shows the 5th.

audits

No audits curated in the MBG registry for this protocol. Score reflects this gap.