From a13a1c91e8a8ea581997c9e09b5bb81cdc6e3168 Mon Sep 17 00:00:00 2001
From: Chris Troutner <chris.troutner@gmail.com>
Date: Wed, 9 Mar 2022 10:08:51 -0800
Subject: [PATCH] Got Offer creation working

---
 dev-docs/README.md            |  8 ++++----
 src/adapters/localdb/index.js |  2 ++
 src/use-cases/offer.js        | 34 ++++++++++++++--------------------
 3 files changed, 20 insertions(+), 24 deletions(-)

diff --git a/dev-docs/README.md b/dev-docs/README.md
index c763c26..99f2b03 100644
--- a/dev-docs/README.md
+++ b/dev-docs/README.md
@@ -47,15 +47,15 @@ These are just a brief, high-level overview. Review the [Specifications](./speci
 
 ## Writing to the Global Database
 
-Adding data to the global P2WDB is triggered by the _Client_ calling a REST API endpoint on `bch-dex`. `bch-dex` [p2wdb npm library](https://www.npmjs.com/package/p2wdb) can be leveraged for easy reading and writing to the P2WDB.
+Adding data to the global P2WDB is triggered by the _Client_ calling a REST API endpoint on `bch-dex`. The [p2wdb npm library](https://www.npmjs.com/package/p2wdb) can be leveraged for easy reading and writing to the P2WDB.
 
 Writing data follows these steps:
 
 - Tokens and BCH are held by a wallet which is under the controlled of `bch-dex`.
 - The _Client_ submits data to the POST `/offer` REST API endpoint to create a new Offer.
-- `bch-dex` will move the funds into a segregated UTXO, and will use that UTXO to create an Offer. The Offer data is written to the P2WDB.
-- `bch-dex` will receive a webhook call to its POST `/order` endpoint by the P2WDB. This event will trigger the import of the new data into the apps local Mongo database, and generate a new Order model.
-- This webhook event is mirrored by every instance of `bch-dex` on the network. Each P2WDB peer on the network will independently validate the new database entry.
+- `bch-dex` will move the funds into a segregated UTXO, and will use that UTXO to create an Offer. The Offer data is written to the P2WDB. The Offer data is also saved to the local MongoDB.
+- After submitting the data to the P2WDB, `bch-dex` will receive a webhook call to its POST `/order` endpoint by the P2WDB. This event will trigger the import of the new data into the apps local Mongo database, and generate a new Order model.
+- This webhook event is mirrored by every instance of `bch-dex` on the network. Each P2WDB peer on the network will independently validate the new database entry and create a new Order model.
 
 
 ## Reading from the Local Database
diff --git a/src/adapters/localdb/index.js b/src/adapters/localdb/index.js
index df0595b..2a4fc18 100644
--- a/src/adapters/localdb/index.js
+++ b/src/adapters/localdb/index.js
@@ -6,6 +6,7 @@
 const Users = require('./models/users')
 const Entries = require('./models/entry')
 const Order = require('./models/order')
+const Offer = require('./models/offer')
 
 class LocalDB {
   constructor () {
@@ -13,6 +14,7 @@ class LocalDB {
     this.Users = Users
     this.Entry = Entries
     this.Order = Order
+    this.Offer = Offer
   }
 }
 
diff --git a/src/use-cases/offer.js b/src/use-cases/offer.js
index 70042ac..085a9c6 100644
--- a/src/use-cases/offer.js
+++ b/src/use-cases/offer.js
@@ -47,30 +47,23 @@ class OfferLib {
       // Update the offer with the new UTXO information.
       offerEntity.utxoTxid = utxoInfo.txid
       offerEntity.utxoVout = utxoInfo.vout
-
-      // Burn PSF token to pay for P2WDB write.
-      const txid = await this.adapters.wallet.burnPsf()
-      console.log('burn txid: ', txid)
-      console.log(`https://simpleledger.info/tx/${txid}`)
-
-      // generate signature.
-      const now = new Date()
-      const message = now.toISOString()
-      const signature = await this.adapters.wallet.generateSignature(message)
-      // console.log('signature: ', signature)
-
-      const p2wdbObj = {
-        txid,
-        signature,
-        message,
-        appId: this.config.p2wdbAppId,
-        data: offerEntity
-      }
+      offerEntity.hdIndex = utxoInfo.hdIndex
 
       // Add offer to P2WDB.
+      const p2wdbObj = {
+        wif: this.adapters.wallet.bchWallet.walletInfo.privateKey,
+        data: offerEntity,
+        appId: this.config.p2wdbAppId
+      }
       const hash = await this.adapters.p2wdb.write(p2wdbObj)
       // console.log('hash: ', hash)
 
+      // Create a MongoDB model to hold the Offer
+      offerEntity.p2wdbHash = hash
+      console.log(`creating new offer model: ${JSON.stringify(offerEntity, null, 2)}`)
+      const offer = new this.OfferModel(offerEntity)
+      await offer.save()
+
       return hash
     } catch (err) {
       // console.log("Error in use-cases/entry.js/createEntry()", err.message)
@@ -97,7 +90,8 @@ class OfferLib {
 
       const utxoInfo = {
         txid,
-        vout: 0
+        vout: 0,
+        hdIndex: keyPair.hdIndex
       }
 
       return utxoInfo