Lombard Finance EVM smart-contracts

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Overview

LBTC is liquid Bitcoin; it's yield-bearing, cross-chain, and 1:1 backed by BTC. LBTC enables yield-bearing BTC to move cross-chain without fragmenting liquidity, and is designed to seamlessly integrate Bitcoin into the decentralized finance (DeFi) ecosystem while maintaining the security and integrity of the underlying asset.

graph TD
    users1(Users) -- mint(data,proofSignature)  --> lbtc1{{LBTC}}
    lbtc1 -- isValidSignature(hash,signature) --> consortium1{{consortium}}
    lbtc1 -- validateWithdrawal(depositID,withdrawalAmount) --> bascule{{bascule}}
    
    users2(Users) -- redeem(scriptPubkey,amount) --> lbtc2{{LBTC}}

    users3(Users) -- depositToBridge(toChain,toAddress,amount) -->lbtc3A{{LBTC, chain A}}
    users3 -- withdrawFromBridge(data,proofSignature) --> lbtc3B{{LBTC, chain B}}
    lbtc3B -- isValidSignature(hash,signature) --> consortium3{{consortium}}

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Addresses

Ethereum

Smart contract	Description	Address	ProxyAdmin
Bascule	Bascule drawbridge designed to prevent bridge hacks before they hit the chain.	0xc750eCAC7250E0D18ecE2C7a5F130E3A765dc260	-
LombardConsortium	Stores consortium threshold key and verify signatures	0xed6d647e2f81e5262101aff72c4a7bcdcfd780e0	0xa212Db18f8aEC6eF2F08cE42D7B447f9a405CD24
LombardTimelock	Safeguard helps to perform delayed transactions (implementation upgrade)	0x055E84e7FE8955E2781010B866f10Ef6E1E77e59	-
LBTC	ERC20 token to interact with protocol	0x8236a87084f8B84306f72007F36F2618A5634494	0xbae061C73876952aa2C5e483B74DfA785425f879
GnosisSafeProxy	Lombard governance and treasury wallet	0x251a604E8E8f6906d60f8dedC5aAeb8CD38F4892	-

Installation

Prerequisites

• Node: v18+

Tasks

Compilation

yarn hardhat compile

Tests

yarn hardhat test

Deploy

yarn hardhat deploy-consortium [params]
yarn hardhat deploy-timelock [params]
yarn hardhat deploy-lbtc [params]