Tip3ToEver

The Tip3ToEver smart contract defines the logic for swapping Tip3 To Ever.

Smart contract responsible for swapping Tip3 token to Ever.

Derives following classes and interfaces: IAcceptTokensTransferCallback, IAcceptTokensBurnCallback, IEverTip3SwapEvents.

constructor

constructor() public

Deploy empty wallet.

buildExchangePayload

function buildExchangePayload(uint64 id, address pair, uint128 expectedAmount) external pure returns (TvmCell)

Build payload constructor for exchanging TIP 3 to EVER, store values from function params to TVMBuilder instance.

Parameters:

Name	Type	Description
id	uint64	Id of the operation call
pair	address	Address of the exchange pair
expectedAmount	uint128	Expected amount of tokens after exchange

Callbacks

onWeverWallet

function onWeverWallet(address _weverWallet) external

Callback deploy for weverWallet.

Parameters:

Name	Type	Description
_weverWallet	address	Address of the WEVER wallet

onAcceptTokensTransfer

function onAcceptTokensTransfer(address /*tokenRoot*/, uint128 amount, address sender, address /*senderWallet*/, address user,TvmCell payload) override external

Callback for swap. If operationStatus is SWAP and value is greater than SWAP_TIP3_TO_EVER_MIN_VALUE, build success, cancel and resultPayload and transfer from Tip3ToEver wallet to the pair’s wallet. If operationStatus is CANCEL emit SwapTip3EverCancelTransfer event and call OnSwapTip3ToEverCancel callback and transfer the amount back to the user, if SUCCESS and msg sender is weverWallet, transfer the amount to weverVault wallet. Else if needCancel var is true transfer value back to the sender

Parameters:

Name	Type	Description
tokenRoot	address	Address of token root
amount	uint128	Amount of tokens to transfer
sender	address	Address of tokens sender
senderWallet	address	Tokens sender’s wallet address
user	address	User’s address for receiving EVER tokens
payload	TvmCell	Transfer payload data

onAcceptTokensBurn

function onAcceptTokensBurn(uint128 /*amount*/, address /*walletOwner*/, address /*wallet*/, address user, TvmCell payload) override external

Callback for burn if the swap succeeded, emits SwapTip3EverSuccessTransfer event and call callback onSwapTip3ToEverSuccess.

Parameters:

Name	Type	Description
amount	uint128	Amount of tokens to burn (optional)
walletOwner	address	Address of wallet owner
wallet	address	Wallet address
user	address	User’s address that canceled exchange
payload	TvmCell	Burn tokens payload data

Key Events

SwapTip3EverSuccessTransfer

SwapTip3EverSuccessTransfer(address user, uint64 id);

Emitted inside onAcceptTokensTransfer callback when Tip3 tokens are successfully swapped to EVERs.

SwapTip3EverCancelTransfer

SwapTip3EverCancelTransfer(address user, uint64 id);

Emitted inside onAcceptTokensTransfer callback when swap is canceled.