<?php
if (! class_exists('OmisePluginHelperTransfer')) {
	class OmisePluginHelperTransfer {
		/**
		 * Format the transfer amount into the appropriate format for each currency.
         * Note, no specific format for JPY currency.
		 *
		 * @param  string  $currency
		 * @param  integer $amount
		 *
		 * @return string
		 */
		public static function amount($currency, $amount) {
			switch (strtoupper($currency)) {
				case 'THB':
                case 'IDR':
                case 'SGD':
                    // Convert to a small unit
					$amount = $amount * 100;
					break;
			}

			return $amount;
		}
	}
}
<?php
if (! class_exists('OmisePluginHelperTransfer')) {
	class OmisePluginHelperTransfer {
		/**
		 * Format the transfer amount into the appropriate format for each currency.
		 * Note, no specific format for JPY currency.
		 *
		 * @param  string  $currency
		 * @param  integer $amount
		 *
		 * @return string
		 */
		public static function amount($currency, $amount) {
			switch (strtoupper($currency)) {
				case 'THB':
				case 'IDR':
				case 'SGD':
					// Convert to a small unit
					$amount = $amount * 100;
					break;
			}

			return $amount;
		}
	}
}
Change a helper file indentation to TAB character
Change a helper file indentation to TAB character

Modify a PHP helper file, transfer.php. Change all indentation from
space to TAB character.

This change makes the PHP source code indentation conformed with
OpenCart coding standard.

Reference:
https://github.com/opencart/opencart/wiki/Coding-standards#indentation
