Adding Auction Contract to Offer Up Dapp

contract/,tx.json

@@ -0,0 +1 @@
+{"height":"1085","txhash":"97AD126A4FBF7A4522275A12FD21EEF14FE2A502D0A2E489785CEAA56CA1F9A5","codespace":"","code":0,"data":"12260A242F636F736D6F732E62616E6B2E763162657461312E4D736753656E64526573706F6E7365","raw_log":"[{\"msg_index\":0,\"events\":[{\"type\":\"coin_received\",\"attributes\":[{\"key\":\"receiver\",\"value\":\"agoric1rwwley550k9mmk6uq6mm6z4udrg8kyuyvfszjk\"},{\"key\":\"amount\",\"value\":\"321000000ubld\"}]},{\"type\":\"coin_spent\",\"attributes\":[{\"key\":\"spender\",\"value\":\"agoric1estsewt6jqsx77pwcxkn5ah0jqgu8rhgflwfdl\"},{\"key\":\"amount\",\"value\":\"321000000ubld\"}]},{\"type\":\"message\",\"attributes\":[{\"key\":\"action\",\"value\":\"/cosmos.bank.v1beta1.MsgSend\"},{\"key\":\"sender\",\"value\":\"agoric1estsewt6jqsx77pwcxkn5ah0jqgu8rhgflwfdl\"},{\"key\":\"module\",\"value\":\"bank\"}]},{\"type\":\"transfer\",\"attributes\":[{\"key\":\"recipient\",\"value\":\"agoric1rwwley550k9mmk6uq6mm6z4udrg8kyuyvfszjk\"},{\"key\":\"sender\",\"value\":\"agoric1estsewt6jqsx77pwcxkn5ah0jqgu8rhgflwfdl\"},{\"key\":\"amount\",\"value\":\"321000000ubld\"}]}]}]","logs":[{"msg_index":0,"log":"","events":[{"type":"coin_received","attributes":[{"key":"receiver","value":"agoric1rwwley550k9mmk6uq6mm6z4udrg8kyuyvfszjk"},{"key":"amount","value":"321000000ubld"}]},{"type":"coin_spent","attributes":[{"key":"spender","value":"agoric1estsewt6jqsx77pwcxkn5ah0jqgu8rhgflwfdl"},{"key":"amount","value":"321000000ubld"}]},{"type":"message","attributes":[{"key":"action","value":"/cosmos.bank.v1beta1.MsgSend"},{"key":"sender","value":"agoric1estsewt6jqsx77pwcxkn5ah0jqgu8rhgflwfdl"},{"key":"module","value":"bank"}]},{"type":"transfer","attributes":[{"key":"recipient","value":"agoric1rwwley550k9mmk6uq6mm6z4udrg8kyuyvfszjk"},{"key":"sender","value":"agoric1estsewt6jqsx77pwcxkn5ah0jqgu8rhgflwfdl"},{"key":"amount","value":"321000000ubld"}]}]}],"info":"","gas_wanted":"82400","gas_used":"65647","tx":null,"timestamp":"","events":[{"type":"tx","attributes":[{"key":"ZmVl","value":"","index":true},{"key":"ZmVlX3BheWVy","value":"YWdvcmljMWVzdHNld3Q2anFzeDc3cHdjeGtuNWFoMGpxZ3U4cmhnZmx3ZmRs","index":true}]},{"type":"tx","attributes":[{"key":"YWNjX3NlcQ==","value":"YWdvcmljMWVzdHNld3Q2anFzeDc3cHdjeGtuNWFoMGpxZ3U4cmhnZmx3ZmRsLzYw","index":true}]},{"type":"tx","attributes":[{"key":"c2lnbmF0dXJl","value":"MW1MQS9GRTlsM09EMW9yUkN3LzdBbFdWTGNKRnorMjRWcldGenpkTUEvOUhrcEhYU1N6Q3JpQmtwazlDakFCd0pXVElGajBMTEtJUTFncUl1cU5kRVE9PQ==","index":true}]},{"type":"message","attributes":[{"key":"YWN0aW9u","value":"L2Nvc21vcy5iYW5rLnYxYmV0YTEuTXNnU2VuZA==","index":true}]},{"type":"coin_spent","attributes":[{"key":"c3BlbmRlcg==","value":"YWdvcmljMWVzdHNld3Q2anFzeDc3cHdjeGtuNWFoMGpxZ3U4cmhnZmx3ZmRs","index":true},{"key":"YW1vdW50","value":"MzIxMDAwMDAwdWJsZA==","index":true}]},{"type":"coin_received","attributes":[{"key":"cmVjZWl2ZXI=","value":"YWdvcmljMXJ3d2xleTU1MGs5bW1rNnVxNm1tNno0dWRyZzhreXV5dmZzempr","index":true},{"key":"YW1vdW50","value":"MzIxMDAwMDAwdWJsZA==","index":true}]},{"type":"transfer","attributes":[{"key":"cmVjaXBpZW50","value":"YWdvcmljMXJ3d2xleTU1MGs5bW1rNnVxNm1tNno0dWRyZzhreXV5dmZzempr","index":true},{"key":"c2VuZGVy","value":"YWdvcmljMWVzdHNld3Q2anFzeDc3cHdjeGtuNWFoMGpxZ3U4cmhnZmx3ZmRs","index":true},{"key":"YW1vdW50","value":"MzIxMDAwMDAwdWJsZA==","index":true}]},{"type":"message","attributes":[{"key":"c2VuZGVy","value":"YWdvcmljMWVzdHNld3Q2anFzeDc3cHdjeGtuNWFoMGpxZ3U4cmhnZmx3ZmRs","index":true}]},{"type":"message","attributes":[{"key":"bW9kdWxl","value":"YmFuaw==","index":true}]}]}

contract/src/offer-up-proposal.js

@@ -67,7 +67,7 @@ export const startOfferUpContract = async permittedPowers => {
   const istIssuer = await istIssuerP;
   const istBrand = await istBrandP;
 
-  const terms = { tradePrice: AmountMath.make(istBrand, 25n * CENT) };
+  const terms = { minBidPrice: AmountMath.make(istBrand, 25n * CENT), maxBids: 3n };
 
   // agoricNames gets updated each time; the promise space only once XXXXXXX
   const installation = await offerUpInstallationP;

contract/src/offer-up.contract.js

@@ -11,7 +11,7 @@
  *      to make an invitation.
  *   3. client makes an offer using the invitation, along with
  *      a proposal (with give and want) and payments. Zoe escrows the payments, and then
- *   4. Zoe invokes the offer handler specified in step 2 -- here {@link tradeHandler}.
+ *   4. Zoe invokes the offer handler specified in step 2 -- here {@link bidHandler}.
  *
  * @see {@link https://docs.agoric.com/guides/zoe/|Zoe Overview} for a walk-thru of this contract
  * @see {@link https://docs.agoric.com/guides/js-programming/hardened-js.html|Hardened JavaScript}
@@ -20,45 +20,36 @@
 // @ts-check
 
 import { Far } from '@endo/far';
 import { M, getCopyBagEntries } from '@endo/patterns';
-import { AssetKind } from '@agoric/ertp/src/amountMath.js';
+import { AssetKind, AmountMath } from '@agoric/ertp/src/amountMath.js';
 import { AmountShape } from '@agoric/ertp/src/typeGuards.js';
 import { atomicRearrange } from '@agoric/zoe/src/contractSupport/atomicTransfer.js';
 import '@agoric/zoe/exported.js';
 
-const { Fail, quote: q } = assert;
+// Added for debugging/console.log
+const bigintReplacer = (_, value) =>
+  typeof value === 'bigint' ? value.toString() : value;
 
-// #region bag utilities
-/** @type { (xs: bigint[]) => bigint } */
-const sum = xs => xs.reduce((acc, x) => acc + x, 0n);
-
-/**
- * @param {import('@endo/patterns').CopyBag} bag
- * @returns {bigint[]}
- */
-const bagCounts = bag => {
-  const entries = getCopyBagEntries(bag);
-  return entries.map(([_k, ct]) => ct);
-};
 // #endregion
 
 /**
  * In addition to the standard `issuers` and `brands` terms,
- * this contract is parameterized by terms for price and,
- * optionally, a maximum number of items sold for that price (default: 3).
+ * this contract is parameterized by terms for bid value and,
+ * optionally, a maximum number of bids before closing an auction (default: 3).
  *
  * @typedef {{
- *   tradePrice: Amount;
- *   maxItems?: bigint;
- * }} OfferUpTerms
+ *   minBidPrice: Amount;
+ *   maxBids?: bigint;
+ * }} AuctionTerms
  */
 
 export const meta = {
   customTermsShape: M.splitRecord(
-    { tradePrice: AmountShape },
+    { minBidPrice: AmountShape },
     { maxItems: M.bigint() },
   ),
 };
+
 // compatibility with an earlier contract metadata API
 export const customTermsShape = meta.customTermsShape;
 
@@ -67,70 +58,93 @@
  *   - creates a new non-fungible asset type for Items, and
  *   - handles offers to buy up to `maxItems` items at a time.
  *
- * @param {ZCF<OfferUpTerms>} zcf
+ * @param {ZCF<AuctionTerms>} zcf
  */
 export const start = async zcf => {
-  const { tradePrice, maxItems = 3n } = zcf.getTerms();
-
-  /**
-   * a new ERTP mint for items, accessed thru the Zoe Contract Facet.
-   * Note: `makeZCFMint` makes the associated brand and issuer available
-   * in the contract's terms.
-   *
-   * AssetKind.COPY_BAG can express non-fungible (or rather: semi-fungible)
-   * amounts such as: 3 potions and 1 map.
-   */
+  const { minBidPrice, maxBids = 3n } = zcf.getTerms();
+
   const itemMint = await zcf.makeZCFMint('Item', AssetKind.COPY_BAG);
   const { brand: itemBrand } = itemMint.getIssuerRecord();
 
-  /**
-   * a pattern to constrain proposals given to {@link tradeHandler}
-   *
-   * The `Price` amount must be >= `tradePrice` term.
-   * The `Items` amount must use the `Item` brand and a bag value.
-   */
   const proposalShape = harden({
-    give: { Price: M.gte(tradePrice) },
+    give: { Price: M.gte(minBidPrice) },
     want: { Items: { brand: itemBrand, value: M.bag() } },
     exit: M.any(),
   });
 
-  /** a seat for allocating proceeds of sales */
+  /** a seat for allocating proceeds of auction sales */
   const proceeds = zcf.makeEmptySeatKit().zcfSeat;
+  // A register to keep all the bids of all items
+  let bidsRegister = new Map();
 
   /** @type {OfferHandler} */
-  const tradeHandler = buyerSeat => {
+  const bidHandler = bidderSeat => {
     // give and want are guaranteed by Zoe to match proposalShape
-    const { want } = buyerSeat.getProposal();
-
-    sum(bagCounts(want.Items.value)) <= maxItems ||
-      Fail`max ${q(maxItems)} items allowed: ${q(want.Items)}`;
-
-    const newItems = itemMint.mintGains(want);
-    atomicRearrange(
-      zcf,
-      harden([
-        // price from buyer to proceeds
-        [buyerSeat, proceeds, { Price: tradePrice }],
-        // new items to buyer
-        [newItems, buyerSeat, want],
-      ]),
-    );
-
-    buyerSeat.exit(true);
-    newItems.exit();
-    return 'trade complete';
+    const { want } = bidderSeat.getProposal();
+    const bidItem = JSON.stringify(want.Items.value, bigintReplacer);
+    console.log(' bidItem is : ', bidItem);
+
+    /**
+    From the bidsRegister Map object, get the array of bids for the given item if it exists otherwise create one.
+    and then place the current bid in that array.
+    then count the number of bids in that array and check whether it is equal to the maxBids.
+    If the number of bids are equal to max bid, we want to find out value of the max bid in the array.
+    */
+
+    // Check if the item already has a bid array in the Map; if not, create one
+    if (!bidsRegister.has(bidItem)) {
+      bidsRegister.set(bidItem, []);
+    }
+
+    // Get the existing bid array for the item
+    let bids = bidsRegister.get(bidItem);
+
+    // Add the current bid to the bid array
+    bids.push(bidderSeat);
+
+    // Check if the number of bids is equal to maxBids
+    if (bids.length == maxBids) {
+      console.log('Maximum bids reached for this item.');
+
+      // Find the maximum bid in the array
+      // Initialize the maximum bid as the first bid in the array
+      let maxBid = bids[0];
+      // Loop through the bids array to find the maximum bid
+      for (let i = 1; i < bids.length; i++) {
+        if (
+          AmountMath.isGTE(
+            bids[i].getCurrentAllocation().Price,
+            maxBid.getCurrentAllocation().Price,
+          )
+        ) {
+          maxBid = bids[i];
+        }
+      }
+
+      const newItems = itemMint.mintGains(want);
+      atomicRearrange(
+        zcf,
+        harden([
+          [newItems, maxBid, want],
+          [maxBid, proceeds, { Price: maxBid.getCurrentAllocation().Price }],
+        ]),
+      );
+      newItems.exit();
+      maxBid.exit(true);
+
+      bids.forEach(async bidderSeatItem => {
+        console.log(JSON.stringify(bidderSeatItem));
+        if (!bidderSeatItem.hasExited()) {
+          bidderSeatItem.exit(true);
+        }
+      });
+      bidsRegister.set(bidItem, []);
+    }
+    return 'bid placed.';
   };
 
-  /**
-   * Make an invitation to trade for items.
-   *
-   * Proposal Keywords used in offers using these invitations:
-   *   - give: `Price`
-   *   - want: `Items`
-   */
   const makeTradeInvitation = () =>
-    zcf.makeInvitation(tradeHandler, 'buy items', undefined, proposalShape);
+    zcf.makeInvitation(bidHandler, 'bid on items', undefined, proposalShape);
 
   // Mark the publicFacet Far, i.e. reachable from outside the contract
   const publicFacet = Far('Items Public Facet', {