The Tomb contract is an ERC-20 token with burnable functionality, designed for the Tomb Finance ecosystem. It includes mechanisms for initial token distribution, tax calculation based on price tiers, and automatic tax adjustments via an oracle. The contract allows for minting by the operator, tax exclusion for specific addresses, and one-time reward distribution to specified pools. It also supports governance-based recovery of unsupported tokens.

The `Oracle` contract computes and updates the average price of a Uniswap V2 pair over a fixed period, using a time-weighted average price (TWAP) mechanism. It stores cumulative prices and timestamps, and updates these values periodically. The contract allows querying the average price of a token pair and ensures there's sufficient liquidity before performing updates. It emits an event whenever the price is updated.

The `TaxOfficeV2` contract manages tax settings for the Tomb token. It allows the operator to set tax tiers, rates, and thresholds, enable/disable auto tax calculation, and manage tax exclusions for addresses. It also facilitates tax-free liquidity provision on Uniswap and tax-free token transfers for approved addresses. Additionally, it can set the Tomb oracle and transfer tax office control.

The `TBond` contract is an ERC-20 token with burnable functionality, inheriting from `ERC20Burnable` and `Operator`. It allows the operator to mint new TBOND tokens to a specified recipient and to burn tokens from any account. The `mint` function ensures that the recipient's balance increases, while the `burn` and `burnFrom` functions enable token burning, with `burnFrom` restricted to the operator.

The `Treasury` contract manages the financial operations of the Tomb Finance ecosystem. It handles the issuance and redemption of bonds (tBOND) based on the price of the TOMB token, as determined by an oracle. The contract also allocates seigniorage (newly minted TOMB) to the Masonry for distribution, and manages funds for the DAO and development. It includes mechanisms for price stabilization, supply expansion, and debt management.

The `TShare` contract is an ERC20 token with burnable functionality, designed for the Tomb Finance ecosystem. It allocates a total supply of 70,000 TSHAREs, distributed among farming rewards, community fund, and dev fund. It includes vesting schedules for community and dev funds, allowing periodic claims. The contract also allows the operator to distribute rewards once and recover unsupported tokens.

The `TombTaxOracle` contract provides price consultation for the TOMB token against the WFTM token using a specified liquidity pair. It allows the owner to set or update the addresses of the TOMB token, WFTM token, and the liquidity pair. The `consult` function returns the price of TOMB in terms of WFTM by dividing the TOMB balance by the WFTM balance in the liquidity pair.

The `TaxOffice` contract manages tax-related settings for the Tomb Finance ecosystem. It allows an operator to set tax tiers based on TWAP (Time-Weighted Average Price) and rates, enable or disable automatic tax calculation, set the tax rate and burn threshold, and designate a tax collector address. Additionally, it can exclude or include addresses from tax, set the Tomb Oracle, and transfer tax office control to a new address.

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