chore: renamed pricedCallSpread to drop 's'. declared option price

Added the price of each option to the invitation details.

the pricedCallSpread was inexplicably in pricedCallSpreads.js. I
dropped the plural.

packages/zoe/src/contracts/callSpread/pricedCallSpreads.js → packages/zoe/src/contracts/callSpread/pricedCallSpread.js

@@ -101,6 +101,13 @@ const start = zcf => {
     await depositToSeat(zcf, collateralSeat, spreadAmount, payment);
     // AWAIT ////
 
+    const numerator =
+      (dir === Position.LONG) ? buyPercent : inverse(buyPercent);
+    const required = floorDivide(
+      multiply(terms.settlementAmount.value, numerator),
+      100,
+    );
+
     /** @type {OfferHandler} */
     const optionPosition = depositSeat => {
       assertProposalShape(depositSeat, {
@@ -115,12 +122,6 @@ const start = zcf => {
       } = depositSeat.getProposal();
 
       // assert that this buyer offered the amount required
-      const numerator =
-        (dir === Position.LONG) ? buyPercent : inverse(buyPercent);
-      const required = floorDivide(
-        multiply(terms.settlementAmount.value, numerator),
-        100,
-      );
       assert(
         collateralMath.isEqual(newCollateral, collateralMath.make(required)),
         details`Collateral required: ${required}`,
@@ -147,6 +148,7 @@ const start = zcf => {
 
     return zcf.makeInvitation(optionPosition, `call spread ${dir}`, {
       position: dir,
+      collateral: required,
       option: spreadAmount.Option,
     });
   }

packages/zoe/test/unitTests/contracts/test-callSpread.js

@@ -12,7 +12,7 @@ import { assertPayoutDeposit, assertPayoutAmount } from '../../zoeTestHelpers';
 import { makeFakePriceAuthority } from '../../../tools/fakePriceAuthority';
 
 const fundedCallSpread = `${__dirname}/../../../src/contracts/callSpread/fundedCallSpread`;
-const pricedCallSpread = `${__dirname}/../../../src/contracts/callSpread/pricedCallSpreads`;
+const pricedCallSpread = `${__dirname}/../../../src/contracts/callSpread/pricedCallSpread`;
 const simpleExchange = `${__dirname}/../../../src/contracts/simpleExchange`;
 
 const makeTestPriceAuthority = (amountMaths, priceList, timer) =>
@@ -669,7 +669,7 @@ test('pricedCallSpread, mid-strike', async t => {
   // Bob makes an offer for the long option
   const bobProposal = harden({
     want: { Option: longOption },
-    give: { Collateral: bucks(225) },
+    give: { Collateral: bucks(longOptionValue.collateral) },
   });
   const bobPurchaseSeat = await zoe.offer(await longInvitation, bobProposal, {
     Collateral: bobBucksPayment,
@@ -693,7 +693,7 @@ test('pricedCallSpread, mid-strike', async t => {
   // carol makes an offer for the short option
   const carolProposal = harden({
     want: { Option: shortOption },
-    give: { Collateral: bucks(75) },
+    give: { Collateral: bucks(shortOptionValue.collateral) },
   });
   const carolPurchaseSeat = await zoe.offer(
     await shortInvitation,