feat(inter-protocol): add amm liquidity script (#5938)

* feat(inter-protocol): add amm liquidity script

* fix: remove dead code

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

packages/inter-protocol/scripts/add-initial-liquidity.js

@@ -0,0 +1,178 @@
+// @ts-check
+import { AmountMath } from '@agoric/ertp';
+import { makeNotifierFromAsyncIterable } from '@agoric/notifier';
+import { E } from '@endo/far';
+
+const { entries } = Object;
+
+const dec6 = 10n ** 6n;
+const dec4 = 10n ** 4n;
+
+const config = {
+  Central: { IST: 10_000n * dec6 },
+  Secondary: { IbcATOM: 500n * dec4 }, // 20 IST per ATOM
+};
+
+const getOfferResult = async (instance, wallet, walletAdmin) => {
+  const offerIt = E(walletAdmin).getOffersNotifier();
+  let result;
+  console.log('awaiting offers...');
+  for await (const offers of makeNotifierFromAsyncIterable(offerIt)) {
+    console.log('offers iterator next:', offers);
+    offers
+      .filter(
+        ({ status, invitationQuery }) =>
+          status === 'complete' && invitationQuery.instance === instance,
+      )
+      .forEach(async ({ id }) => {
+        result = await E(wallet).lookup('offerResult', id);
+        console.log({ facet: result });
+      });
+    if (result) break;
+  }
+  return result;
+};
+
+/**
+ *
+ * @param { any } homeP
+ * @param { {now?: () => number }} _endowments
+ *
+ * @typedef {ReturnType<typeof import('../../wallet/api/src/lib-wallet').makeWalletRoot>['admin']} Wallet
+ */
+const addInitialLiquidity = async (homeP, { now = () => Date.now() }) => {
+  const { wallet, agoricNames, zoe, scratch } = E.get(homeP);
+
+  const walletBridge = E(wallet).getBridge();
+
+  const getService = async name => {
+    console.log('lookup instance', name);
+    const instance = await E(agoricNames).lookup('instance', name);
+    const pub = E(zoe).getPublicFacet(instance);
+    return { instance, pub };
+  };
+  const amm = await getService('amm');
+
+  const addUsingWallet = async () => {
+    console.log('getting purses from walletBridge...');
+    const { value: pStates } = await E(
+      E(walletBridge).getPursesNotifier(),
+    ).getUpdateSince();
+    console.log(pStates);
+
+    const toAmt = detail => {
+      const [[name, value]] = entries(detail);
+      const { pursePetname } =
+        pStates.find(p => p.brandPetname === name) ||
+        assert.fail(`cannot find purse ${name}`);
+      return { pursePetname, value };
+    };
+    const proposalTemplate = {
+      give: {
+        Central: toAmt(config.Central),
+        Secondary: toAmt(config.Secondary),
+      },
+    };
+    console.log({ proposalTemplate });
+
+    console.log('amm.makeAddLiquidityInvitation...');
+    const invitation = await E(amm.pub).makeAddLiquidityInvitation();
+    console.log({ invitation });
+
+    const offerConfig = {
+      id: `${now()}`,
+      invitation,
+      instanceHandle: amm.instance,
+      proposalTemplate,
+      requestContext: undefined,
+    };
+    console.log('addOffer', offerConfig);
+    const added = await E(walletBridge).addOffer(offerConfig);
+    console.log({ added });
+
+    const result = await getOfferResult(
+      amm.instance,
+      wallet,
+      E(wallet).getAdminFacet(),
+    );
+    console.log({ result });
+  };
+
+  const addUsingZoe = async () => {
+    const { keys, values } = Object;
+    /** @type {<K extends string, V>(entries: [K, V][]) => Record<K, V>} */
+    const toRecord = Object.fromEntries;
+
+    console.log('getting purses, issuers from wallet...');
+    const [purseEntries, { value: issuerEntries }] = await Promise.all([
+      E(wallet).getPurses(),
+      E(E(walletBridge).getIssuersNotifier()).getUpdateSince(),
+    ]);
+
+    const purses = toRecord(purseEntries);
+    const issuers = toRecord(issuerEntries);
+    console.log({ purses: keys(purses), issuers: keys(issuers) });
+    assert(
+      issuers.IbcATOM,
+      'Issuers not complete. Try again after purses are provisioned',
+    );
+    const liqIssuer = E(amm.pub).getLiquidityIssuer(issuers.IbcATOM.brand);
+    const liqBrand = await E(liqIssuer).getBrand();
+
+    /** @param {Record<string, bigint>} detail */
+    const toAmt = detail => {
+      const [[name, value]] = entries(detail);
+      const issuer = issuers[name];
+      assert(issuer);
+      return AmountMath.make(issuer.brand, value);
+    };
+    /** @param {Amount} amt */
+    const withdraw = async amt => {
+      for await (const purse of values(purses)) {
+        const b2 = await E(purse).getAllegedBrand();
+        if (b2 === amt.brand) {
+          return E(purse).withdraw(amt);
+        }
+      }
+      throw Error(`no purse found for ${amt.brand}`);
+    };
+    const proposal = {
+      want: {
+        Liquidity: AmountMath.makeEmpty(liqBrand),
+      },
+      give: {
+        Central: toAmt(config.Central),
+        Secondary: toAmt(config.Secondary),
+      },
+    };
+    console.log({ proposal });
+    console.log('withdraw payments...', proposal.give);
+    const payments = {
+      Central: await withdraw(proposal.give.Central),
+      Secondary: await withdraw(proposal.give.Secondary),
+    };
+    console.log('payments', payments);
+    console.log('amm.makeAddLiquidityInvitation...');
+    const invitation = await E(amm.pub).makeAddLiquidityInvitation();
+    console.log({ invitation });
+
+    const seat = await E(zoe).offer(invitation, proposal, payments);
+    console.log({ seat });
+
+    const result = await E(seat).getOfferResult();
+    console.log({ result });
+
+    const payouts = await E(seat).getPayouts();
+    console.log('initialLiquidityPayouts', keys(payouts));
+    E(scratch).set('initialLiquidityPayouts', payouts);
+  };
+
+  console.log(
+    addUsingWallet,
+    'does not handle want Liquidity so we do not use it',
+  );
+  await addUsingZoe();
+};
+harden(addInitialLiquidity);
+
+export default addInitialLiquidity;