1.增加两个支付的配置，复制下方sql语句，在数据库中执行

INSERT INTO `eb_system_config` (`id`, `menu_name`, `type`, `input_type`, `config_tab_id`, `parameter`, `upload_type`, `required`, `width`, `high`, `value`, `info`, `desc`, `sort`, `status`, `level`, `link_id`, `link_value`) VALUES (null, 'v3_pay_public_key', 'text', 'input', 4, '', 1, '', 100, 0, '\"\"', 'v3支付公钥', 'v3支付公钥，新版本使用公钥请填写', 0, 1, 0, 0, 0);
INSERT INTO `eb_system_config` (`id`, `menu_name`, `type`, `input_type`, `config_tab_id`, `parameter`, `upload_type`, `required`, `width`, `high`, `value`, `info`, `desc`, `sort`, `status`, `level`, `link_id`, `link_value`) VALUES (null, 'v3_pay_public_pem', 'upload', 'input', 4, '', 3, '', 0, 0, '\"\"', 'v3支付公钥证书', 'v3支付公钥证书，使用新版本支付公钥上传此证书', 0, 1, 0, 0, 0);

2.修改文件crmeb/crmeb/services/pay/storage/V3WechatPay.php

增加两行代码

'v3_pay_public_key' => sys_config('v3_pay_public_key'),
'v3_pay_public_pem' => $this->getPemPath('v3_pay_public_pem'),

3.修改文件crmeb/crmeb/services/easywechat/v3pay/BaseClient.php

将83行代码修改成

if ($this->app['config']['v3_payment']['v3_pay_public_key'] != '') {
    $options['headers']['Wechatpay-Serial'] = $this->app['config']['v3_payment']['v3_pay_public_key'];
} else {
    $options['headers']['Wechatpay-Serial'] = $this->getCertficatescAttr('serial_no');
}

将191行代码修改成

if ($this->app['config']['v3_payment']['v3_pay_public_key'] != '') {
    $key_path = $this->app['config']['v3_payment']['v3_pay_public_pem'];
} else {
    $key_path = $this->app['config']['v3_payment']['cert_path'];
}

4.然后在后台支付配置中填写您的信息