在发送本地签名交易前，向客户端抛出transactionHash

patches/web3-core-method+1.7.4.patch

@@ -0,0 +1,15 @@
+diff --git a/node_modules/web3-core-method/lib/index.js b/node_modules/web3-core-method/lib/index.js
+index 84cb1c3..f8aea93 100644
+--- a/node_modules/web3-core-method/lib/index.js
++++ b/node_modules/web3-core-method/lib/index.js
+@@ -561,6 +561,10 @@ Method.prototype.buildCall = function () {
+         };
+         // SENDS the SIGNED SIGNATURE
+         var sendSignedTx = function (sign) {
++            var returnObj = Object.assign({}, payload.params[0]);
++            returnObj.method = payload.method;
++            returnObj.transactionHash = sign.transactionHash;
++            defer.eventEmitter.emit('presend', returnObj);
+             var signedPayload = { ...payload,
+                 method: 'eth_sendRawTransaction',
+                 params: [sign.rawTransaction]