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feat(wallet-vat,autoswap-vat): Create wallet & autoswap backend
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,42 +1,91 @@ | ||
| import harden from '@agoric/harden'; | ||
| import { makeMint } from '@agoric/ertp/core/mint'; | ||
| import { upload } from './upload-contract'; | ||
|
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| const CONTRACT_NAME = 'zoe:autoswap' | ||
|
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| // Usage: | ||
| // ag-solo bundle -e init-autoswap zoe:autoswap=../node_modules/@agoric/ertp/core/zoe/contracts/autoswap.js | ||
|
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| export default async ({ home, bundle }) => { | ||
| // Install all the bundle entries that have a TARGET:NAME. | ||
| // TARGET may be 'zoe' or 'contractHost' for example. | ||
| const keyNames = Object.keys(bundle).sort().reduce((prior, key) => { | ||
| const match = key.match(/^[^:]+:(.*)/); | ||
| if (match) { | ||
| prior.push([key, match[1]]); | ||
| } | ||
| return prior; | ||
| }, []); | ||
| await upload(home, bundle, keyNames.map(([k, n]) => k)); | ||
|
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||
| // Register the installations. | ||
| const nameIds = {}; | ||
| let autoswapKey; | ||
| await Promise.all(keyNames.map(([k, n]) => | ||
| n === 'autoswap' ? autoswapKey = k : home~.uploads~.get(k).then(u => home~.registrar~.register(n, u)) | ||
| .then(id => nameIds[n] = id))); | ||
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| // TODO: This is just a sketch of how we might convert home.moolaMint into | ||
| // funds for the autoswap instance. | ||
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| // Instantiate autoswap with some fresh moola and register the instance. | ||
| if (autoswapKey) { | ||
| const installHandle = await home~.uploads~.get(autoswapKey); | ||
| const options = { | ||
| assays: await Promise.all([home~.moolaMint~.getAssay()]), | ||
| purses: await Promise.all([home~.moolaMint~.mint(100000)]), | ||
| }; | ||
| const instance = home~.zoe~.makeInstance(installHandle, harden(options)); | ||
| nameIds['autoswap'] = await home~.registrar~.register('autoswap', instance); | ||
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| console.log('*** AUTOSWAP'); | ||
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| // AUTOSWAP INSTALL | ||
|
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| // 1. Load & install the autoswap contract. | ||
| await upload(home, bundle, [ CONTRACT_NAME ]); | ||
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| // 2. Get the autoswap contract installation. | ||
| const installationHandle = await home~.uploads~.get(CONTRACT_NAME); | ||
|
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| // 3. Store the contract installation in the registry. | ||
| const installationId = await home~.registrar~.register(CONTRACT_NAME, installationHandle); | ||
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| console.log('- Autoswap intallation', CONTRACT_NAME, '=>', installationId); | ||
|
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| // AUTOSWAP INSTANCE | ||
|
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| // 1. Assays | ||
| const assays = await Promise.all([ | ||
| home~.moolaMint~.getAssay(), | ||
| home~.simoleanMint~.getAssay(), | ||
| ]); | ||
|
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||
| // 2. Contract instrance. | ||
| try { | ||
| await home~.zoe~.makeInstance(installationHandle, { assays }); | ||
| } catch(e) {} | ||
| const { instance, instanceHandle, terms } = await home~.zoe~.makeInstance(installationHandle, { assays }); | ||
|
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||
| // 3. Offer rules | ||
| const units = await Promise.all([ | ||
| terms~.assays~.[0]~.makeUnits(10000), | ||
| terms~.assays~.[1]~.makeUnits(10000), | ||
| terms~.assays~.[2]~.makeUnits(0), | ||
| ]); | ||
|
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||
| const offerRules = harden({ | ||
| payoutRules: [ | ||
| { | ||
| kind: 'offerExactly', | ||
| units: units[0], | ||
| }, | ||
| { | ||
| kind: 'offerExactly', | ||
| units: units[1], | ||
| }, | ||
| { | ||
| kind: 'wantAtLeast', | ||
| units: units[2], | ||
| }, | ||
| ], | ||
| exitRule: { | ||
| kind: 'onDemand', | ||
| }, | ||
| }); | ||
|
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| // 4. Payments (from mint, not from purse) | ||
|
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| const faucets = await Promise.all([ | ||
| home~.moolaMint~.mint(units[0]), | ||
| home~.simoleanMint~.mint(units[1]), | ||
| ]); | ||
|
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| const payments = await Promise.all([ | ||
| faucets[0]~.withdrawAll(), | ||
| faucets[1]~.withdrawAll(), | ||
| ]); | ||
|
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| // 5. Liquidities. | ||
| const { escrowReceipt } = await home~.zoe~.escrow(offerRules, payments); | ||
| const liquidityOk = await instance~.addLiquidity(escrowReceipt); | ||
| console.log(liquidityOk); | ||
|
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| if (liquidityOk) { | ||
| // Only store if the contract instance has liquidities. | ||
| const instanceId = await home~.registrar~.register(CONTRACT_NAME, instanceHandle); | ||
| console.log('- Autoswap instance', CONTRACT_NAME, '=>', instanceId); | ||
| } | ||
|
|
||
| // Output the record from contract IDs to registered names to stdout. | ||
| console.log(JSON.stringify(nameIds, undefined, 2)); | ||
| }; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| import harden from '@agoric/harden'; | ||
|
|
||
| function checkOrder(a0, a1, b0, b1) { | ||
| if (a0 === b0 && a1 === b1) { | ||
| return true; | ||
| } | ||
|
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||
| if (a0 === b1 && a1 === b0) { | ||
| return false; | ||
| } | ||
|
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| throw new TypeError('Canot resove asset ordering'); | ||
| } | ||
|
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| export async function makeExchange(E, log, host, zoe, registrar) { | ||
| // === API | ||
|
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| async function getPrice(instanceId, extent0, assayId0, assayId1) { | ||
| const instanceHandle = await E(registrar).get(instanceId); | ||
|
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| // Find the assays in the registrar | ||
| const registrarAssays = await Promise.all([ | ||
| E(registrar).get(assayId0), | ||
| E(registrar).get(assayId1), | ||
| ]); | ||
|
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| // Get the assays in the contract. | ||
| // Get the contract instance. | ||
| const { | ||
| terms: { assays: contractAssays }, | ||
| instance, | ||
| } = await E(zoe).getInstance(instanceHandle); | ||
|
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| // Check whether we sell on contract assay 0 or 1. | ||
| const normal = checkOrder( | ||
| registrarAssays[0], | ||
| registrarAssays[1], | ||
| contractAssays[0], | ||
| contractAssays[1], | ||
| ); | ||
|
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| // Units of the input amount. | ||
| const unit0 = await E(registrarAssays[0]).makeUnits(extent0); | ||
|
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| // Order the units accordingly. | ||
| const units = [ | ||
| normal ? unit0 : undefined, | ||
| normal ? undefined : unit0, | ||
| undefined, | ||
| ]; | ||
|
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| // Extract the price (multi steps for debugging). | ||
| const unit1 = await E(instance).getPrice(units); | ||
| const { extent } = unit1; | ||
| return extent; | ||
| } | ||
|
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| async function getOfferRules(instanceId, extent, assayId0, assayId1) { | ||
| const instanceHandle = await E(registrar).get(instanceId); | ||
|
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| // Find the assays by id in the registrar. | ||
| const registrarAssays = await Promise.all([ | ||
| E(registrar).get(assayId0), | ||
| E(registrar).get(assayId1), | ||
| ]); | ||
|
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| // Get the assays in the contract. | ||
| const { | ||
| terms: { assays: contractAssays }, | ||
| } = await E(zoe).getInstance(instanceHandle); | ||
|
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| // Check whether we sell on contract assay 0 or 1. | ||
| const normal = checkOrder( | ||
| registrarAssays[0], | ||
| registrarAssays[1], | ||
| contractAssays[0], | ||
| contractAssays[1], | ||
| ); | ||
|
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| // Contrust the rules for serialization (no instance). | ||
| // This rule is the payment | ||
| const rule0 = { | ||
| kind: 'offerExactly', | ||
| units: { assayId: assayId0, extent }, | ||
| }; | ||
| // This rule is the payout | ||
| const rule1 = { | ||
| kind: 'wantAtLeast', | ||
| units: { assayId: assayId1 }, | ||
| }; | ||
|
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| // Order the rules accordingly. | ||
| const offerRules = harden({ | ||
| payoutRules: [ | ||
| normal ? rule0 : rule1, | ||
| normal ? rule1 : rule0, | ||
| { | ||
| kind: 'wantAtLeast', | ||
| units: {}, | ||
| }, | ||
| ], | ||
| exitRule: { | ||
| kind: 'onDemand', | ||
| }, | ||
| }); | ||
|
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| return offerRules; | ||
| } | ||
|
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| const autoswap = harden({ | ||
| userFacet: { | ||
| getPrice, | ||
| getOfferRules, | ||
| }, | ||
| adminFacet: {}, | ||
| readFacet: {}, | ||
| }); | ||
|
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||
| return autoswap; | ||
| } |
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