529:     function _burnTokenFrom(
530:         address sender,
531:         string memory symbol,
532:         uint256 amount
533:     ) internal {
534:         address tokenAddress = tokenAddresses(symbol);
535: 
536:         if (tokenAddress == address(0)) revert TokenDoesNotExist(symbol);
537:         if (amount == 0) revert InvalidAmount();
538: 
539:         TokenType tokenType = _getTokenType(symbol);
540: 
541:         if (tokenType == TokenType.External) {
542:             IERC20(tokenAddress).safeTransferFrom(sender, address(this), amount); // <= FOUND
543:         } else if (tokenType == TokenType.InternalBurnableFrom) {
544:             IERC20(tokenAddress).safeCall(abi.encodeWithSelector(IBurnableMintableCappedERC20.burnFrom.selector, sender, amount));
545:         } else {
546:             IERC20(tokenAddress).safeTransferFrom(sender, IBurnableMintableCappedERC20(tokenAddress).depositAddress(bytes32(0)), amount); // <= FOUND
547:             IBurnableMintableCappedERC20(tokenAddress).burn(bytes32(0));
548:         }
549:     }
439:     function expressReceiveToken(
440:         bytes32 tokenId,
441:         address destinationAddress,
442:         uint256 amount,
443:         bytes32 commandId
444:     ) external {
445:         if (gateway.isCommandExecuted(commandId)) revert AlreadyExecuted(commandId);
446: 
447:         address caller = msg.sender;
448:         ITokenManager tokenManager = ITokenManager(getValidTokenManagerAddress(tokenId));
449:         IERC20 token = IERC20(tokenManager.tokenAddress());
450: 
451:         SafeTokenTransferFrom.safeTransferFrom(token, caller, destinationAddress, amount); // <= FOUND
452: 
453:         _setExpressReceiveToken(tokenId, destinationAddress, amount, commandId, caller);
454:     }
467:     function expressReceiveTokenWithData(
468:         bytes32 tokenId,
469:         string memory sourceChain,
470:         bytes memory sourceAddress,
471:         address destinationAddress,
472:         uint256 amount,
473:         bytes calldata data,
474:         bytes32 commandId
475:     ) external {
476:         if (gateway.isCommandExecuted(commandId)) revert AlreadyExecuted(commandId);
477: 
478:         address caller = msg.sender;
479:         ITokenManager tokenManager = ITokenManager(getValidTokenManagerAddress(tokenId));
480:         IERC20 token = IERC20(tokenManager.tokenAddress());
481: 
482:         SafeTokenTransferFrom.safeTransferFrom(token, caller, destinationAddress, amount); // <= FOUND
483: 
484:         _expressExecuteWithInterchainTokenToken(tokenId, destinationAddress, sourceChain, sourceAddress, data, amount);
485: 
486:         _setExpressReceiveTokenWithData(tokenId, sourceChain, sourceAddress, destinationAddress, amount, data, commandId, caller);
487:     }
