LendFactory

The LendFactory is the entry point for creating new one-way lending markets. It deploys a triplet of contracts — Vault, LendController, and AMM — from blueprint implementations stored in an internal registry. Each market is fully isolated.

The factory uses Snekmate's ownable module for access control and pausable for emergency pause functionality.

LendFactory.vy

The source code for the LendFactory.vy contract can be found on GitHub. The contract is written in Vyper version 0.4.3.

Deployment addresses will be added once contracts are finalized.

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Market Creation

create

LendFactory.create(_borrowed_token: address, _collateral_token: address, _A: uint256, _fee: uint256, _loan_discount: uint256, _liquidation_discount: uint256, _price_oracle: address, _monetary_policy: address, _name: String[64], _supply_limit: uint256) -> address[3]

Deploys a new lending market by creating a Vault, LendController, and AMM from their respective blueprints. Validates all parameters, initializes the triplet, and registers the market.

Input	Type	Description
_borrowed_token	address	Token that lenders deposit and borrowers receive
_collateral_token	address	Token used as collateral by borrowers
_A	uint256	Amplification coefficient — determines band width (~1/A)
_fee	uint256	Swap fee for the AMM
_loan_discount	uint256	Maximum discount for LTV calculation
_liquidation_discount	uint256	Discount at which liquidation can occur
_price_oracle	address	Initialized price oracle contract
_monetary_policy	address	Initialized monetary policy contract
_name	String[64]	Name for the vault token
_supply_limit	uint256	Maximum supply cap for the vault

Returns: array of three addresses — [vault, controller, amm] (address[3]).

Emits: NewVault event.

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Market Registry

market_count

LendFactory.market_count() -> uint256: view

Returns the total number of lending markets created by the factory.

Returns: number of markets (uint256).

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markets

LendFactory.markets(_n: uint256) -> Market: view

Returns the market info struct for a given market index.

Input	Type	Description
_n	uint256	Market index (0-based)

Returns: market struct containing vault, controller, amm, collateral token, borrowed token, and market index (Market).

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coins

LendFactory.coins(_vault_id: uint256) -> IERC20[2]: view

Returns the borrowed and collateral token addresses for a given vault.

Input	Type	Description
_vault_id	uint256	Vault index

Returns: array of [borrowed_token, collateral_token] (IERC20[2]).

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vaults_index

LendFactory.vaults_index(_vault: IVault) -> uint256: view

Returns the index of a vault in the factory registry. Uses a 2^128 offset internally — a return value of 0 means the vault is not registered.

Input	Type	Description
_vault	IVault	Vault address to look up

Returns: vault index (uint256).

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Blueprints

amm_blueprint

LendFactory.amm_blueprint() -> address: view

Returns the current AMM blueprint address used for deploying new markets.

Returns: blueprint address (address).

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controller_blueprint

LendFactory.controller_blueprint() -> address: view

Returns the current controller blueprint address.

Returns: blueprint address (address).

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vault_blueprint

LendFactory.vault_blueprint() -> address: view

Returns the current vault blueprint address.

Returns: blueprint address (address).

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controller_view_blueprint

LendFactory.controller_view_blueprint() -> address: view

Returns the current controller view blueprint address.

Returns: blueprint address (address).

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Fee Receivers

fee_receiver

LendFactory.fee_receiver(_controller: address) -> address: view

Returns the fee receiver for a given controller. If a custom fee receiver is set, it returns that; otherwise, it returns the default fee receiver.

Input	Type	Description
_controller	address	Controller address

Returns: fee receiver address (address).

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set_default_fee_receiver

LendFactory.set_default_fee_receiver(_fee_receiver: address)

Guarded Method by Snekmate 🐍

This function is only callable by the owner of the contract.

Sets the default fee receiver for all markets that don't have a custom one.

Input	Type	Description
_fee_receiver	address	New default fee receiver address

Emits: SetFeeReceiver event.

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set_custom_fee_receiver

LendFactory.set_custom_fee_receiver(_controller: address, _fee_receiver: address)

Guarded Method by Snekmate 🐍

This function is only callable by the owner of the contract.

Sets a custom fee receiver for a specific market's controller.

Input	Type	Description
_controller	address	Controller address
_fee_receiver	address	Custom fee receiver address

Emits: CustomSetFeeReceiver event.

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Contract Ownership

admin

LendFactory.admin() -> address: view

Returns the current owner of the factory contract.

Returns: owner address (address).

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pause

LendFactory.pause()

Guarded Method by Snekmate 🐍

This function is only callable by the owner of the contract.

Pauses the factory, preventing new market creation.

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unpause

LendFactory.unpause()

Guarded Method by Snekmate 🐍

This function is only callable by the owner of the contract.

Unpauses the factory, re-enabling market creation.

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Other Methods

version

LendFactory.version() -> String[5]: view

Returns the contract version string.

Returns: version (String[5]).

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