wip promissory note using Ergo

Signed-off-by: Dan Selman <danscode@selman.org>
accordproject · May 9, 2018 · 0d98b8a · 0d98b8a
1 parent 3d3adbb
commit 0d98b8a
Show file tree

Hide file tree

Showing 5 changed files with 36 additions and 7 deletions.
diff --git a/latedeliveryandpenalty/package.json b/latedeliveryandpenalty/package.json
@@ -2,9 +2,15 @@
     "name": "latedeliveryandpenalty",
     "version": "0.0.4",
     "description": "A sample Late Delivery And Penalty clause.",
+    "author": "clause.io",
+    "license": "Apache-2.0",
     "engines": {
         "cicero": "^0.2.28"
     },
+    "repository": {
+        "type": "git",
+        "url": "git+https://github.com/accordproject/cicero-template-library.git"
+    },
     "scripts": {
         "test": "mocha"
     },

diff --git a/promissory-note/lib/logic.ergo b/promissory-note/lib/logic.ergo
@@ -14,10 +14,27 @@
 
 namespace org.accordproject.promissorynote
 
+//import ergo.moment.*
+
+define function compoundInterestMultiple(annualInterest Double, numberOfDays Double) : Double {
+    enforce annualInterest >= 0.0;
+    enforce numberOfDays >= 0.0;
+    // TODO (DCS) replace * with pow when supported
+    (1.0 + annualInterest) * (numberOfDays / 365.0)
+}
+
 contract PromissoryNote over TemplateModel {
   clause check(request Request) : Response {
+    enforce contract.dollarAmount >= 0.0;
+    let outstanding = contract.dollarAmount - request.amountPaid;
+    enforce outstanding >= 0.0;
+
+    let numberOfDays = momentDiff(request.timestamp,contract.date);
+    enforce numberOfDays >= 0.0;
+    let compounded =  outstanding * compoundInterestMultiple(contract.interestRate, numberOfDays);
+
     return new Response{
-      outstandingBalance: 200.0
+      outstandingBalance: compounded
     }
   }
 }
diff --git a/promissory-note/models/model.cto b/promissory-note/models/model.cto
@@ -1,11 +1,11 @@
 namespace org.accordproject.promissorynote
 
 transaction Request {
-  o Integer amountPaid
+  o Double amountPaid
 }
 
 transaction Response {
-  o Integer outstandingBalance
+  o Double outstandingBalance
 }
 
 enum LegalEntity {
@@ -23,7 +23,7 @@ concept TemplateModel {
   /**
    * The name for the clause
    */
-  o Integer dollarAmount
+  o Double dollarAmount
   o DateTime date
   o String maker
   o Double interestRate
@@ -32,7 +32,7 @@ concept TemplateModel {
   o String lender
   o LegalEntity legalEntity
   o String lenderAddress
-  o Integer principal
+  o Double principal
   o DateTime maturityDate
   o Integer defaultDays
   o Integer insolvencyDays

diff --git a/promissory-note/package.json b/promissory-note/package.json
@@ -2,9 +2,15 @@
   "name": "promissory-note",
   "version": "0.0.1",
   "description": "A promissory note",
+  "author": "clause.io",
+  "license": "Apache-2.0",
   "engines": {
     "cicero": "^0.2.54"
   },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/accordproject/cicero-template-library.git"
+  },
   "scripts": {
     "test": "mocha"
   },

diff --git a/promissory-note/test/logic.js b/promissory-note/test/logic.js
@@ -47,11 +47,11 @@ describe('Logic', () => {
         it('should execute a smart clause', async function () {
             const request = {
 		"$class": "org.accordproject.promissorynote.Request",
-		"amountPaid": 100
+		"amountPaid": 100.0
 	    };
             const result = await engine.execute(clause, request);
             result.should.not.be.null;
-            result.response.outstandingBalance.should.equal(200);
+            result.response.outstandingBalance.should.greaterThan(200);
         });
     });
 });