The `ExampleBridge` contract allows users to deposit ERC20 tokens and immediately withdraw the same amount. It sets up gas usage and subsidy criteria for DAI and USDC tokens. The `convert` function checks the input and output assets, approves the rollup processor to transfer the tokens, and claims a subsidy for the rollup beneficiary. The `computeCriteria` function generates a unique identifier for subsidy claims based on the input and output assets.

The `UniswapBridge` contract facilitates token swaps on Uniswap v3 using complex paths. It supports up to two split paths with up to three pools each. The paths and minimum acceptable price are encoded in the `_auxData` parameter. The contract handles token approvals, executes swaps, and ensures the output meets the minimum price requirement. It also supports ETH and various ERC20 tokens, and can register subsidy criteria for token pairs.

The `LidoBridge` contract facilitates the conversion between ETH and wrapped stETH (wstETH) for the Aztec rollup processor. It uses Lido for staking ETH to receive stETH, wraps stETH to wstETH, and vice versa. It also integrates with Curve to exchange stETH for ETH. The contract ensures efficient fund management by pre-approving necessary allowances and leaving minimal dust to save gas on future transactions.

The `StabilityPoolBridge` contract allows users to deposit and withdraw LUSD to and from Liquity's StabilityPool. It mints SPB tokens representing ownership of the deposited LUSD. Rewards from the StabilityPool (ETH and LQTY) are automatically swapped to LUSD and reinvested. The contract also handles urgent withdrawals, bypassing reward swaps if necessary. It integrates with Uniswap for token swaps and ensures efficient gas usage.

The `Subsidy` contract allows users to subsidize specific bridge interactions by depositing ETH, which can be claimed by rollup providers to cover gas costs. It ensures low-use bridges remain functional by making it profitable for providers to process transactions. Subsidies are defined by `gasPerMinute` and accumulate over time. Beneficiaries can register, claim subsidies, and withdraw accumulated ETH.

The `ERC4626Bridge` contract facilitates the issuance and redemption of shares in ERC4626-compatible vaults. It allows users to deposit assets (including ETH, which is wrapped to WETH) to receive vault shares or redeem vault shares to get back the underlying assets. The contract also manages necessary approvals and registers vaults for subsidies. It includes a mechanism to claim subsidies based on specific criteria.

The `TroveBridge` contract facilitates borrowing and repaying LUSD using Liquity's troves. It allows users to open troves by depositing ETH and borrowing LUSD, and to repay their debt by returning LUSD and TB tokens. The contract also handles collateral withdrawals and liquidations, and integrates with Uniswap V3 for collateral swaps. It ensures precise debt accounting and prevents users from altering the trove's individual collateral ratio (ICR).

The `StakingBridge` contract allows users to stake and unstake LQTY tokens in Liquity's staking contract. It mints SB tokens representing staked LQTY and handles rewards (LUSD and ETH) by automatically swapping them to LQTY before staking or unstaking. The contract ensures precise SB-to-LQTY value tracking and includes an "urgent withdrawal mode" to handle potential swap failures during withdrawals.

The `DataProvider` contract by Aztec maps assets and bridges to human-readable names. It allows the owner to add and tag bridges and assets, and provides functions to retrieve these mappings by ID or tag. It also fetches all supported assets and bridges, and calculates the subsidy that can be claimed for specific bridge interactions. The contract interacts with the `IRollupProcessor` and `ISubsidy` interfaces for these operations.

The `YearnBridge` contract allows users to deposit and withdraw tokens from Yearn Vaults via the Aztec Connect protocol. It supports both ERC20 tokens and ETH, converting ETH to WETH when necessary. The contract sets up necessary token approvals, handles deposits and withdrawals, and manages subsidies for interactions. It also includes error handling for invalid operations and ensures proper token allowances.