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feat: emit NotBoundToken event #479

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merged 2 commits into from
Jan 29, 2024
Merged

feat: emit NotBoundToken event #479

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23e849c
feat: emit NotBoundToken event
j75689 Jan 29, 2024
d6a2b9b
chore: add comments
j75689 Jan 29, 2024
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9 changes: 8 additions & 1 deletion contracts/TokenHub.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,7 @@ contract TokenHub is ITokenHub, System, IParamSubscriber, IApplication, ISystemR
// BEP-299: Token Migration after BC Fusion
event TokenRecoverLocked(bytes32 indexed tokenSymbol, address indexed tokenAddr, address indexed recipient, uint256 amount, uint256 unlockAt);
event CancelTokenRecoverLock(bytes32 indexed tokenSymbol, address indexed tokenAddr, address indexed attacker, uint256 amount);
event NotBoundToken(bytes32 indexed tokenSymbol, address indexed recipient, uint256 amount);

// BEP-171: Security Enhancement for Cross-Chain Module
modifier onlyTokenOwner(address bep20Token) {
Expand Down Expand Up @@ -548,7 +549,13 @@ contract TokenHub is ITokenHub, System, IParamSubscriber, IApplication, ISystemR
uint256 convertedAmount;
if (tokenSymbol != BEP2_TOKEN_SYMBOL_FOR_BNB) {
address contractAddr = bep2SymbolToContractAddr[tokenSymbol];
require(contractAddr != address(0x00), "invalid symbol");
if (contractAddr == address(0x00)) {
// if the token is not bound, just emit an event
// please notify the token owner to handle the token recovery
emit NotBoundToken(tokenSymbol, recipient, amount);
return;
}

uint256 bep20TokenDecimals=bep20ContractDecimals[contractAddr];
convertedAmount = convertFromBep2Amount(amount, bep20TokenDecimals);// convert to bep20 amount
require(IBEP20(contractAddr).balanceOf(address(this)) >= convertedAmount, "insufficient balance");
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