> For the complete documentation index, see [llms.txt](https://docs.prl.one/buttonwood/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.prl.one/buttonwood/developers/tranche/tranche.md).

# Tranche

ERC20 token to represent a single tranche for a ButtonTranche bond

## API Documentation

## `constructor()` (public)

Constructor for Tranche ERC20 token

## `init(string name, string symbol, address admin, address _collateralToken)` (public)

Constructor for Tranche ERC20 token

## `mint(address to, uint256 amount)` (external)

Mint `amount` tokens to `to` Only callable by the owner (bond controller). Used to manage bonds, specifically creating tokens upon deposit

## `burn(address from, uint256 amount)` (external)

Burn `amount` tokens from `from`'s balance Only callable by the owner (bond controller). Used to manage bonds, specifically burning tokens upon redemption

## `redeem(address from, address to, uint256 amount)` (external)

Burn `amount` tokens from `from` and return the proportional value of the collateral token to `to`

## `decimals() → uint8` (public)

Returns the number of decimals used to get its user representation. For example, if `decimals` equals `2`, a balance of `505` tokens should be displayed to a user as `5,05` (`505 / 10 ** 2`).

Uses the same number of decimals as the collateral token

NOTE: This information is only used for *display* purposes: it in no way affects any of the arithmetic of the contract, including {IERC20-balanceOf} and {IERC20-transfer}.


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