add initializableERC721

migrations/4_deploy_periphery.js

@@ -40,6 +40,7 @@ module.exports = async (deployer, network, accounts) => {
     let WETHAddress = CONFIG.WETH;
     let DODOTokenAddress = CONFIG.DODO;
     let DODOApproveProxyAddress = CONFIG.DODOApproveProxy;
+    let WETH = CONFIG.WETH;
 
     let DspTemplateAddress = CONFIG.DSP;
     let DspFactoryAddress = CONFIG.DSPFactory;