DeBridgeGate - deBridge Home

Contract for assets transfers. The user can transfer the asset to any of the approved chains. The admin manages the assets, fees and other important protocol parameters.

Variables

BPS_DENOMINATOR

uint256 public constant BPS_DENOMINATOR;

Basis points or bps, set to 10,000 (equal to 1/10000). Used to express relative values (fees)

GOVMONITORING_ROLE

bytes32 public constant GOVMONITORING_ROLE;

Role allowed to stop transfers

SUBMISSION_PREFIX

uint256 public constant SUBMISSION_PREFIX;

Prefix to calculation submissionId

DEPLOY_PREFIX

uint256 public constant DEPLOY_PREFIX;

Prefix to calculation deployId

deBridgeTokenDeployer

address public deBridgeTokenDeployer;

Address of IDeBridgeTokenDeployer contract

signatureVerifier

address public signatureVerifier;

Current signature verifier address to verify signatures.

excessConfirmations

uint8 public excessConfirmations;

Minimal required confirmations in case sent amount is big, has no effect if less than SignatureVerifier.minConfirmations

flashFeeBps

uint256 public flashFeeBps;

Flash loan fee in basis points (1/10000)

nonce

uint256 public nonce;

Outgoing submissions count

getDebridge

mapping(bytes32 => struct IDeBridgeGate.DebridgeInfo) public getDebridge;

Maps debridgeId (see getDebridgeId) => bridge-specific information.

getDebridgeFeeInfo

mapping(bytes32 => struct IDeBridgeGate.DebridgeFeeInfo) public getDebridgeFeeInfo;

Maps debridgeId (see getDebridgeId) => fee information

isSubmissionUsed

mapping(bytes32 => bool) public isSubmissionUsed;

Returns whether the transfer with the submissionId was claimed.

isBlockedSubmission

mapping(bytes32 => bool) public isBlockedSubmission;

Returns whether the transfer with the submissionId is blocked.

getAmountThreshold

mapping(bytes32 => uint256) public getAmountThreshold;

Maps debridgeId (see getDebridgeId) to threshold amount after which Math.max(excessConfirmations,SignatureVerifier.minConfirmations) is used instead of SignatureVerifier.minConfirmations

getChainToConfig

mapping(uint256 => struct IDeBridgeGate.ChainSupportInfo) public getChainToConfig;

Whether the chain for the asset is supported to send

getChainFromConfig

mapping(uint256 => struct IDeBridgeGate.ChainSupportInfo) public getChainFromConfig;

Whether the chain for the asset is supported to claim

feeDiscount

mapping(address => struct IDeBridgeGate.DiscountInfo) public feeDiscount;

Fee discount for address

getNativeInfo

mapping(address => struct IDeBridgeGate.TokenInfo) public getNativeInfo;

Returns native token info by wrapped token address

defiController

address public defiController;

DefiController that can supply liquidity to staking strategies (AAVE, Compound, etc.)

feeProxy

address public feeProxy;

Proxy to convert collected fees and transfer to Ethereum treasury

callProxy

address public callProxy;

Address of the proxy to execute user’s calls.

weth

contract IWETH public weth;

Wrapped native token contract

feeContractUpdater

address public feeContractUpdater;

Contract that can override globalFixedNativeFee

globalFixedNativeFee

uint256 public globalFixedNativeFee;

Fallback fixed fee in native asset (used if chain fixed fee is 0)

globalTransferFeeBps

uint16 public globalTransferFeeBps;

Fallback transfer fee in BPS (used if chain transfer fee is 0)

wethGate

contract IWethGate public wethGate;

WethGate contract used for WETH withdraws affected by EIP1884

lockedClaim

uint256 public lockedClaim;

Locker for claim method

Functions

initialize

function initialize(
  uint8 _excessConfirmations,
  contract IWETH _weth
) public

Constructor that initializes the most important configurations.

Parameters:

Name	Type	Description
_excessConfirmations	uint8	Minimal required confirmations in case of too many confirmations
_weth	contract IWETH	Wrapped native token contract

send

function send(
    address _tokenAddress,
    uint256 _amount,
    uint256 _chainIdTo,
    bytes _receiver,
    bytes _permit,
    bool _useAssetFee,
    uint32 _referralCode,
    bytes _autoParams
) external

This method is used for the transfer of assets from the native chain. It locks an asset in the smart contract in the native chain and enables minting of deAsset on the secondary chain. Parameters:

Name	Type	Description
`_tokenAddress`	`address`	Asset identifier.
`_amount`	`uint256`	Amount to be transferred (note: the fee can be applied).
`_chainIdTo`	`uint256`	Chain id of the target chain.
`_receiver`	`bytes`	Receiver address.
`_permit`	`bytes`	deadline + signature for approving the spender by signature.
`_useAssetFee`	`bool`	use assets fee for pay protocol fix (work only for specials token)
`_referralCode`	`uint32`	Referral code
`_autoParams`	`bytes`	Auto params for external call in target network

claim

function claim(
    bytes32 _debridgeId,
    uint256 _amount,
    uint256 _chainIdFrom,
    address _receiver,
    uint256 _nonce,
    bytes _signatures,
    bytes _autoParams
) external

Is used for transfers into the native chain to unlock the designated amount of asset from collateral and transfer it to the receiver. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_amount`	`uint256`	Amount of the transferred asset (note: the fee can be applied).
`_chainIdFrom`	`uint256`	Chain where submission was sent
`_receiver`	`address`	Receiver address.
`_nonce`	`uint256`	Submission id.
`_signatures`	`bytes`	Validators signatures to confirm
`_autoParams`	`bytes`	Auto params for external call

flash

function flash(
    address _tokenAddress,
    address _receiver,
    uint256 _amount,
    bytes _data
) external

Get a flash loan, msg.sender must implement IFlashCallback. Parameters:

Name	Type	Description
`_tokenAddress`	`address`	An asset to loan
`_receiver`	`address`	Where funds should be sent
`_amount`	`uint256`	Amount to loan
`_data`	`bytes`	Data to pass to sender’s flashCallback function

deployNewAsset

function deployNewAsset(
    bytes _nativeTokenAddress,
    uint256 _nativeChainId,
    string _name,
    string _symbol,
    uint8 _decimals,
    bytes _signatures
) external

Deploy a deToken(DeBridgeTokenProxy) for an asset. Parameters:

Name	Type	Description
`_nativeTokenAddress`	`bytes`	A token address on a native chain
`_nativeChainId`	`uint256`	The token native chain’s id
`_name`	`string`	The token’s name
`_symbol`	`string`	The token’s symbol
`_decimals`	`uint8`	The token’s decimals
`_signatures`	`bytes`	Validators’ signatures

autoUpdateFixedNativeFee

function autoUpdateFixedNativeFee(
    uint256 _globalFixedNativeFee
) external

Update native fix fee. Called by our fee update contract. Parameters:

Name	Type	Description
`_globalFixedNativeFee`	`uint256`	new value

updateChainSupport

function updateChainSupport(
    uint256[] _chainIds,
    struct IDeBridgeGate.ChainSupportInfo[] _chainSupportInfo,
    bool _isChainFrom
) external

Update asset’s fees. Parameters:

Name	Type	Description
`_chainIds`	`uint256[]`	Chain identifiers.
`_chainSupportInfo`	`struct IDeBridgeGate.ChainSupportInfo[]`	Chain support info.
`_isChainFrom`	`bool`	is true for editing getChainFromConfig.

updateGlobalFee

function updateGlobalFee(
    uint256 _globalFixedNativeFee,
    uint16 _globalTransferFeeBps
) external

Update fallbacks for fixed fee in native asset and transfer fee. Parameters:

Name	Type	Description
`_globalFixedNativeFee`	`uint256`	Fallback fixed fee in native asset, used if a chain fixed fee is set to 0
`_globalTransferFeeBps`	`uint16`	Fallback transfer fee in BPS, used if a chain transfer fee is set to 0

updateAssetFixedFees

function updateAssetFixedFees(
    bytes32 _debridgeId,
    uint256[] _supportedChainIds,
    uint256[] _assetFeesInfo
) external

Update asset’s fees. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_supportedChainIds`	`uint256[]`	Chain identifiers.
`_assetFeesInfo`	`uint256[]`	Chain support info.

updateExcessConfirmations

function updateExcessConfirmations(
    uint8 _excessConfirmations
) external

Update minimal amount of required signatures, must be > SignatureVerifier.minConfirmations to have an effect. Parameters:

Name	Type	Description
`_excessConfirmations`	`uint8`	Minimal amount of required signatures

setChainSupport

function setChainSupport(
    uint256 _chainId,
    bool _isSupported,
    bool _isChainFrom
) external

Set support for the chains where the token can be transferred. Parameters:

Name	Type	Description
`_chainId`	`uint256`	Chain id where tokens are sent.
`_isSupported`	`bool`	Whether the token is transferable to other chain.
`_isChainFrom`	`bool`	Is true for editing getChainFromConfig.

setCallProxy

function setCallProxy(
    address _callProxy
) external

Set address of the call proxy. Parameters:

Name	Type	Description
`_callProxy`	`address`	Address of the proxy that executes calls.

updateAsset

function updateAsset(
    bytes32 _debridgeId,
    uint256 _maxAmount,
    uint16 _minReservesBps,
    uint256 _amountThreshold
) external

Update specific asset’s bridge parameters. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_maxAmount`	`uint256`	Maximum amount of current chain token to be wrapped.
`_minReservesBps`	`uint16`	Minimal reserve ratio in BPS.
`_amountThreshold`	`uint256`	Threshold amount after which `Math.max(excessConfirmations,SignatureVerifier.minConfirmations)` is used instead of `SignatureVerifier.minConfirmations`

setSignatureVerifier

function setSignatureVerifier(
    address _verifier
) external

Set signature verifier address. Parameters:

Name	Type	Description
`_verifier`	`address`	Signature verifier address.

setDeBridgeTokenDeployer

function setDeBridgeTokenDeployer(
    address _deBridgeTokenDeployer
) external

Set asset deployer address. Parameters:

Name	Type	Description
`_deBridgeTokenDeployer`	`address`	Asset deployer address.

setDefiController

function setDefiController(
    address _defiController
) external

Set defi controller. Parameters:

Name	Type	Description
`_defiController`	`address`	Defi controller address.

setFeeContractUpdater

function setFeeContractUpdater(
    address _value
) external

Set fee contract updater, that can update fix native fee. Parameters:

Name	Type	Description
`_value`	`address`	New contract address.

setWethGate

function setWethGate(
    contract IWethGate _wethGate
) external

Set wethGate contract, used for weth withdrawals affected by EIP1884. Parameters:

Name	Type	Description
`_wethGate`	`contract IWethGate`	Address of new wethGate contract.

pause

function pause() external

Stop all transfers.

unpause

function unpause() external

Allow transfers again.

withdrawFee

function withdrawFee(
    bytes32 _debridgeId
) external

Withdraw collected fees to feeProxy. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.

requestReserves

function requestReserves(
    address _tokenAddress,
    uint256 _amount
) external

Request the assets to be used in DeFi protocol. Parameters:

Name	Type	Description
`_tokenAddress`	`address`	Asset address.
`_amount`	`uint256`	Amount to request.

returnReserves

function returnReserves(
    address _tokenAddress,
    uint256 _amount
) external

Return the assets that were used in DeFi protocol. Parameters:

Name	Type	Description
`_tokenAddress`	`address`	Asset address.
`_amount`	`uint256`	Amount of tokens to claim.

setFeeProxy

function setFeeProxy(
    address _feeProxy
) external

Set fee converter proxy. Parameters:

Name	Type	Description
`_feeProxy`	`address`	Fee proxy address.

blockSubmission

function blockSubmission(
    bytes32[] _submissionIds,
    bool isBlocked
) external

Block or unblock a list of submissions. Parameters:

Name	Type	Description
`_submissionIds`	`bytes32[]`	IDs of submissions to modify.
`isBlocked`	`bool`	True to block, false to unblock.

updateFlashFee

function updateFlashFee(
    uint256 _flashFeeBps
) external

Update flash fees. Parameters:

Name	Type	Description
`_flashFeeBps`	`uint256`	New fee in BPS.

updateFeeDiscount

function updateFeeDiscount(
    address _address,
    uint16 _discountFixBps,
    uint16 _discountTransferBps
) external

Update discount settings. Parameters:

Name	Type	Description
`_address`	`address`	Customer address.
`_discountFixBps`	`uint16`	Fix discount in BPS.
`_discountTransferBps`	`uint16`	Transfer % discount in BPS.

receive

function receive() external

_checkConfirmations

function _checkConfirmations(
    bytes32 _submissionId,
    bytes32 _debridgeId,
    uint256 _amount,
    bytes _signatures
) internal

_addAsset

function _addAsset(
    bytes32 _debridgeId,
    address _tokenAddress,
    bytes _nativeAddress,
    uint256 _nativeChainId
) internal

Add support for the asset. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_tokenAddress`	`address`	Address of the asset on this chain.
`_nativeAddress`	`bytes`	Address of asset on native chain.
`_nativeChainId`	`uint256`	Native chain ID.

_send

function _send(
    bytes _amount,
    address _chainIdTo,
    uint256 _permit
) internal returns (uint256 amountAfterFee, bytes32 debridgeId, struct IDeBridgeGate.FeeParams feeParams)

Locks asset on the chain and enables minting on the other chain. Parameters:

Name	Type	Description
`_amount`	`bytes`	Amount to be transferred (fee can be applied).
`_chainIdTo`	`address`	Target chain ID.
`_permit`	`uint256`	Deadline + signature for permit.

_publishSubmission

function _publishSubmission(
    bytes32 _debridgeId,
    uint256 _chainIdTo,
    uint256 _amount,
    bytes _receiver,
    struct IDeBridgeGate.FeeParams feeParams,
    uint32 _referralCode,
    struct IDeBridgeGate.SubmissionAutoParamsTo autoParams,
    bool hasAutoParams
) internal

_applyDiscount

function _applyDiscount(
    uint256 amount,
    uint16 discountBps
) internal returns (uint256)

_validateToken

function _validateToken(
    address _token
) internal

_claim

function _claim(
    bytes32 _debridgeId,
    bytes32 _receiver,
    address _amount
) internal returns (bool isNativeToken)

Unlock the asset on the current chain and transfer to receiver. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_receiver`	`bytes32`	Receiver address.
`_amount`	`address`	Amount of the transferred asset (note: fee can be applied).

_mintOrTransfer

function _mintOrTransfer(
    address _token,
    address _receiver,
    uint256 _amount,
    bool isNativeToken
) internal

_safeTransferETH

function _safeTransferETH(
    address to,
    uint256 value
) internal

_withdrawWeth

function _withdrawWeth(
    address _receiver,
    uint256 _amount
) internal

_normalizeTokenAmount

function _normalizeTokenAmount(
    address _token,
    uint256 _amount
) internal returns (uint256)

getDefiAvaliableReserves

function getDefiAvaliableReserves(
    address _tokenAddress
) external returns (uint256)

Get reserves of a token available to use in DeFi. Parameters:

Name	Type	Description
`_tokenAddress`	`address`	Token address.

getDebridgeId

function getDebridgeId(
    uint256 _chainId,
    address _tokenAddress
) public returns (bytes32)

Calculates asset identifier. Parameters:

Name	Type	Description
`_chainId`	`uint256`	Current chain id.
`_tokenAddress`	`address`	Address of the asset on other chain.

getbDebridgeId

function getbDebridgeId(
    uint256 _chainId,
    bytes _tokenAddress
) public returns (bytes32)

Calculates asset identifier. Parameters:

Name	Type	Description
`_chainId`	`uint256`	Current chain id.
`_tokenAddress`	`bytes`	Address of the asset on other chain.

getDebridgeChainAssetFixedFee

function getDebridgeChainAssetFixedFee(
    bytes32 _debridgeId,
    uint256 _chainId
) external returns (uint256)

Returns asset fixed fee value for specified debridge and chainId. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_chainId`	`uint256`	Chain id.

getSubmissionIdFrom

function getSubmissionIdFrom(
    bytes32 _debridgeId,
    uint256 _chainIdFrom,
    uint256 _amount,
    address _receiver,
    uint256 _nonce,
    struct IDeBridgeGate.SubmissionAutoParamsFrom _autoParams,
    bool _hasAutoParams,
    address _sender
) public returns (bytes32)

Calculate submission id for auto claimable transfer. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Asset identifier.
`_chainIdFrom`	`uint256`	Chain identifier of the chain where tokens are sent from.
`_amount`	`uint256`	Amount of the transferred asset (note: the fee can be applied).
`_receiver`	`address`	Receiver address.
`_nonce`	`uint256`	Submission id.
`_autoParams`	`struct IDeBridgeGate.SubmissionAutoParamsFrom`	Auto params for external call.
`_hasAutoParams`	`bool`	True if auto params are provided.
`_sender`	`address`	Address that will call claim.

getDeployId

function getDeployId(
    bytes32 _debridgeId,
    string _name,
    string _symbol,
    uint8 _decimals
) public returns (bytes32)

Calculates asset identifier for deployment. Parameters:

Name	Type	Description
`_debridgeId`	`bytes32`	Id of an asset, see getDebridgeId.
`_name`	`string`	Asset’s name.
`_symbol`	`string`	Asset’s symbol.
`_decimals`	`uint8`	Asset’s decimals.

getChainId

function getChainId() public returns (uint256 cid)

Get current chain id.

version

function version() external returns (uint256)

Get this contract’s version.

​Variables

​BPS_DENOMINATOR

​GOVMONITORING_ROLE

​SUBMISSION_PREFIX

​DEPLOY_PREFIX

​deBridgeTokenDeployer

​signatureVerifier

​excessConfirmations

​flashFeeBps

​nonce

​getDebridge

​getDebridgeFeeInfo

​isSubmissionUsed

​isBlockedSubmission

​getAmountThreshold

​getChainToConfig

​getChainFromConfig

​feeDiscount

​getNativeInfo

​defiController

​feeProxy

​callProxy

​weth

​feeContractUpdater

​globalFixedNativeFee

​globalTransferFeeBps

​wethGate

​lockedClaim

​Functions

​initialize

​Parameters:

​send

​claim

​flash

​deployNewAsset

​autoUpdateFixedNativeFee

​updateChainSupport

​updateGlobalFee

​updateAssetFixedFees

​updateExcessConfirmations

​setChainSupport

​setCallProxy

​updateAsset

​setSignatureVerifier

​setDeBridgeTokenDeployer

​setDefiController

​setFeeContractUpdater

​setWethGate

​pause

​unpause

​withdrawFee

​requestReserves

​returnReserves

​setFeeProxy

​blockSubmission

​updateFlashFee

​updateFeeDiscount

​receive

​_checkConfirmations

​_addAsset

​_send

​_publishSubmission

​_applyDiscount

​_validateToken

​_claim

​_mintOrTransfer

​_safeTransferETH

​_withdrawWeth

​_normalizeTokenAmount

​getDefiAvaliableReserves

​getDebridgeId

​getbDebridgeId

​getDebridgeChainAssetFixedFee

​getSubmissionIdFrom

​getDeployId

​getChainId

​version