Bridge Dependencies

The AggLayer LxLy unified bridge (`PolygonZkEVMBridgeV2`, same address on every connected chain) links Ethereum (network 0) to AggLayer chains such as Katana (network 20). Assets are escrowed in the L1 bridge and a wrapped representation is minted on the destination. Katana additionally uses "Vault Bridge" tokens (e.g. vbUSDC), which deposit the escrowed asset into yield vaults — so holders of the bridged token are exposed to both the bridge and the underlying vault.

	Protocol / Token	Type	Model	DVN	Integration	Details
	Spectra Finance	direct	Transport	—	vbUSDC MetaVault on Katana	A live MetaVault on Katana holds Vault Bridge USDC (~$1.26M TVL); the MetaVault share itself is not bridged, but its backing sits behind the AggLayer bridge
	Yearn yvUSD	direct	Transport	—	AggLayer LxLy + Vault Bridge USDC (vbUSDC)	`KatanaStrategy` ("Katana yvUSDC Compounder", ~$1.92M USDC) wraps USDC into vbUSDC `0x53E8…a765e` and bridges to Katana (AggLayer network 20); reports return via the bridge's `onMessageReceived` callback
	Flex	indirect	Transport	—	Collateral is yvUSD (which bridges to Katana)	yvUSD's Katana leg sits behind the AggLayer bridge; a fault there feeds into yvUSD's PPS, which is Flex's sole collateral and oracle input

Chainlink's cross-chain interoperability protocol. Messages are validated by the Chainlink DON with a Risk Management Network; tokens move via burn/mint or lock/mint token pools.

	Protocol / Token	Type	Model	DVN	Integration	Details
	Apyx apxUSD	direct	Bridged	—	Chainlink CCIP (LockReleaseTokenPool)	TokenAdminRegistry maps apxUSD to pool `0x0e9c…5BB5` (LockReleaseTokenPool 1.6.1) — canonical apxUSD is escrowed on Ethereum; Base holds a bridged representation
	Centrifuge JAAA	direct	Mints native	—	Chainlink CCIP (2-of-2 MultiAdapter)	Second half of the 2-of-2 quorum with LayerZero V2; a forged message reaching the Spoke could mint JAAA, but BOTH bridges must be compromised
	Maple (syrupUSDC)	direct	Bridged	—	Chainlink CCIP (LockReleaseTokenPool)	LockReleaseTokenPool holds ~13% of supply on mainnet, backing bridged syrupUSDC on Base/Arbitrum/Solana

Circle's Cross-Chain Transfer Protocol moves native USDC by burning on the source chain and minting on the destination, gated by Circle's off-chain attestation service. Using canonical CCTP removes third-party lock-and-mint bridge risk; the trust assumption reduces to Circle's availability and attestation finality.

	Protocol / Token	Type	Model	DVN	Integration	Details
	Gauntlet gtUSDa	direct	Transport	—	Circle CCTP V2 (native burn/mint)	Bridges USDC across Base/Arbitrum/Optimism to Morpho
	Origin OUSD	direct	Transport	—	Circle CCTP V2	Cross-chain strategies bridge ~42% of TVL to Base and HyperEVM
	Yearn yvUSD	direct	Transport	—	Circle CCTP V2 (CCTPStrategy)	Bridges USDC to Arbitrum (funded, ~3.5%) and Base (added, 0 debt); Katana uses AggLayer separately
	Flex	indirect	Transport	—	Collateral is yvUSD (which bridges via CCTP)

Generic cross-chain messaging. Tokens bridge via the OFT / OFT-Adapter standard; security depends on the configured DVN (Decentralized Verifier Network) set and the token's mint/burn authority on each chain. The DVN column shows how many independent verifiers must attest a message before it executes — a 1-of-1 is a single point of failure (the configuration behind the April 2026 rsETH incident). Values are read onchain from each route's ULN config; the badge links to the config source.

	Protocol / Token	Type	Model	DVN	Integration	Details
	Across Protocol	direct	Transport	TODO	LayerZero OFT (asset routes)	The assessed asset is the V2 LP token, which is not bridged; Across integrates LZ OFT to move bridged assets through its own routes
	Cap stcUSD	direct	Bridged	3-of-3	LayerZero OFT Adapter ("LayerZero vault")	Adapter `0x983a…4137` escrows 25,311,191 stcUSD — ~52% of the 48.68M supply, the largest locked share on this page; Katana runs a native OFT at the same vanity address `0x8888…8888`
	Centrifuge JAAA	direct	Mints native	TODO	LayerZero V2 (2-of-2 MultiAdapter)	Spoke `0xEC35…25aB` holds `wards` mint authority on JAAA and mints on cross-chain message; 5 DVNs on the LZ side and a 2-of-2 quorum with CCIP mean BOTH bridges must be compromised
	InfiniFi	direct	Bridged	4-of-4	LayerZero OFT Adapters (siUSD + iUSD)	siUSD adapter `0x5f21…c3c0` escrows 29,340 siUSD and iUSD adapter `0xdd1c…3005` escrows 4.33 iUSD; both mint native OFTs on Katana. Neither adapter holds RECEIPT_TOKEN_MINTER, so they cannot mint native supply
	Midas mHYPER	direct	Mints native	4-of-4	LayerZero OFT Adapter (MidasLzMintBurnOFTAdapter)	Adapter holds M_HYPER_MINT_OPERATOR_ROLE (mint has no onchain backing check) and the burn role
	Paxos USDG	direct	Mints native	3-of-3	LayerZero V2 OFT (OFTWrapper)	OFTWrapper is Supply Controller SC3 with 45M USDG mint capacity (~521 USDG/sec refill) — the bridge can mint native USDG
	Re (reUSD)	direct	Mints native	2-of-2	LayerZero OFT (ReMintBurnAdapter)	ReMintBurnAdapter holds a live cross-chain mint path on reUSD; active on Avalanche, Arbitrum, Base, BNB; 2.5M/24h rate limit
	Resolv RLP	direct	Bridged	2-of-3	LayerZero OFT Adapter	OFT Adapter `0x234c…d06c` escrows canonical RLP on Ethereum (133,516 RLP locked of 14.64M supply); remotes are bridged OFTs
	Resolv wstUSR	direct	Bridged	2-of-3	LayerZero OFT Adapter	OFT Adapter `0xab17…1978` escrows canonical wstUSR (406,723 locked, ~22% of supply); live on Arbitrum, Base, BSC, Bera, Soneium, HyperEVM, TAC
	Sky USDS	direct	Bridged	2-of-2	LayerZero V2 OFT Adapter (Solana + Avalanche only)	Minor route: LayerZero handles only Solana + Avalanche (~48.7M locked, <0.7% of cross-chain supply) and does NOT hold `wards` on USDS. The bulk of USDS/sUSDS bridges via native rollup bridges — see the Native Rollup Bridges row
	Fluid	indirect	Bridged	4-of-4	rsETH market exposure	Inherits rsETH's LayerZero OFT Adapter model (canonical rsETH escrowed on Ethereum)
	KernelDAO hgETH	indirect	Bridged	4-of-4	Wraps rsETH (Kelp DAO)	rsETH bridges via OFT Adapter `0x85d4…8Ef3`, which escrows 46,254 rsETH (~9.6% of supply) — it cannot mint native rsETH

Each rollup's own canonical token bridge (OP Stack StandardBridge, Arbitrum Nitro gateway, etc.). L1 tokens are escrowed and minted 1:1 on the L2 by the rollup's bridge; security inherits the L2's proof system and challenge window rather than an external validator set — generally the lowest-trust bridge class, but still a dependency for any asset held on an L2. No DVN concept applies.

	Protocol / Token	Type	Model	DVN	Integration	Details
	Sky USDS	direct	Bridged	—	OP Stack + Arbitrum Nitro canonical bridges (SkyLink)	Primary USDS/sUSDS cross-chain route: ~$0.45B USDS + ~812M sUSDS escrowed on L1 and minted 1:1 on Base, Optimism, Unichain (OP Stack) and Arbitrum (Nitro). No bridge holds `wards` on USDS; LayerZero carries only Solana + Avalanche (<0.7%)