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kreadKit.js
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/* eslint-disable no-bitwise */
/* eslint-disable no-undef */
// @ts-check
import { updateCollectionMetrics } from './market-metrics.js';
import { assert } from '@agoric/assert';
import { AmountMath, BrandShape } from '@agoric/ertp';
import { prepareExoClassKit, M } from '@agoric/vat-data';
import { makeDurableZone } from '@agoric/zone/durable.js';
import { E } from '@endo/eventual-send';
import { errors } from './errors.js';
import {
makeCharacterNftObjs,
makeCopyBagAmountShape,
addAllToMap,
provideRecorderKits,
} from './utils.js';
import { text } from './text.js';
import { makeCopyBag, mustMatch } from '@agoric/store';
import {
CharacterI,
HelperI,
ItemI,
MarketI,
PublicI,
CreatorI,
CharacterGuardBagShape,
ItemGuard,
ItemGuardBagShape,
ItemRecorderGuard,
MarketRecorderGuard,
MarketMetricsGuard,
RarityGuard,
BaseCharacterGuard,
MarketEntryGuard,
CharacterEntryGuard,
CharacterRecorderGuard,
} from './type-guards.js';
import { atomicRearrange } from '@agoric/zoe/src/contractSupport/index.js';
import { multiplyBy } from '@agoric/zoe/src/contractSupport/ratio.js';
import '@agoric/zoe/exported.js';
/** @typedef {import('@agoric/zoe/src/contractSupport/atomicTransfer.js').TransferPart} TransferPart */
/**
* this provides the exoClassKit for our upgradable KREAd contract
* Utilizes capabilities from the prepare function suchs as mints
* timer service and values from the privateArgs
*
*
* @param {import('@agoric/vat-data').Baggage} baggage
* @param {ZCF} zcf
* @param {{
* seed: number,
* mintFeeAmount: Amount<'nat'>,
* royaltyRate: Ratio,
* platformFeeRate: Ratio,
* mintRoyaltyRate: Ratio,
* mintPlatformFeeRate: Ratio,
* royaltyDepositFacet: DepositFacet,
* platformFeeDepositFacet: DepositFacet,
* paymentBrand: Brand,
* minUncommonRating: number
* }} privateArgs
* @param {{
* characterIssuerRecord: IssuerRecord<"copyBag">
* characterMint: ZCFMint<"copyBag">
* itemIssuerRecord: IssuerRecord<"copyBag">
* itemMint: ZCFMint<"copyBag">
* clock: import('@agoric/time/src/types.js').Clock
* makeRecorderKit: import('@agoric/zoe/src/contractSupport').MakeRecorderKit,
* recorderKits: KreadKitRecorderKits
* }} powers
*/
export const prepareKreadKit = (
baggage,
zcf,
{
seed,
mintFeeAmount,
royaltyRate,
platformFeeRate,
mintRoyaltyRate,
mintPlatformFeeRate,
royaltyDepositFacet,
platformFeeDepositFacet,
paymentBrand,
minUncommonRating,
},
{
characterIssuerRecord,
characterMint,
itemIssuerRecord,
itemMint,
clock,
makeRecorderKit,
recorderKits: {
characterKit,
itemKit,
marketCharacterKit,
marketCharacterMetricsKit,
marketItemKit,
marketItemMetricsKit,
},
},
) => {
const { brand: characterBrand } = characterIssuerRecord;
const { brand: itemBrand } = itemIssuerRecord;
const marketItemNode = marketItemKit.recorder.getStorageNode();
const marketCharacterNode = marketCharacterKit.recorder.getStorageNode();
const characterNode = characterKit.recorder.getStorageNode();
const characterShape = makeCopyBagAmountShape(
characterBrand,
CharacterGuardBagShape,
);
const itemShape = makeCopyBagAmountShape(itemBrand, ItemGuardBagShape);
return prepareExoClassKit(
baggage,
'KreadKit',
{
helper: HelperI,
character: CharacterI,
item: ItemI,
market: MarketI,
public: PublicI,
creator: CreatorI,
},
() => {
const zone = makeDurableZone(baggage);
return {
character: harden({
/** @type {MapStore<string, CharacterEntry | string[]>} */
entries: zone.mapStore('characters', {
keyShape: M.string(),
valueShape: M.or(CharacterEntryGuard, M.arrayOf(M.string())),
}),
/** @type {MapStore<number, BaseCharacter>} */
bases: zone.mapStore('baseCharacters', {
keyShape: M.number(),
valueShape: BaseCharacterGuard,
}),
}),
item: harden({
/** @type {MapStore<number, ItemEntry} */
entries: zone.mapStore('items', {
keyShape: M.number(),
valueShape: ItemRecorderGuard,
}),
/** @type {MapStore<'common' | 'uncommonToLegendary', Item[]>} */
bases: zone.mapStore('baseItems', {
keyShape: RarityGuard,
valueShape: M.arrayOf(ItemGuard),
}),
}),
market: harden({
/** @type {MapStore<string, MarketEntry>} */
characterEntries: zone.mapStore('characterMarket', {
keyShape: M.string(),
valueShape: MarketEntryGuard,
}),
/** @type {MapStore<number, MarketEntry>} */
itemEntries: zone.mapStore('itemMarket', {
keyShape: M.number(),
valueShape: MarketEntryGuard,
}),
/** @type {MapStore<'character' | 'item', MarketMetrics>} */
metrics: zone.mapStore('marketMetrics', {
keyShape: M.or('character', 'item'),
valueShape: MarketMetricsGuard,
}),
}),
};
},
{
helper: {
async getTimeStamp() {
return E(clock).getCurrentTimestamp();
},
randomNumber() {
seed |= 0;
seed = (seed + 0x6d2b79f5) | 0;
let t = Math.imul(seed ^ (seed >>> 15), 1 | seed);
// eslint-disable-next-line operator-assignment
t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
},
},
character: {
calculateLevel(name) {
const character = this.state.character.entries.get(name);
let level = character.character.level;
const itemLevels = character.inventory
.getAmountAllocated('Item')
.value.payload.map(([value, _supply]) => {
return value.level;
});
level = itemLevels.reduce((acc, value) => acc + value, level);
return level;
},
validateInventoryState(inventoryState) {
const itemTypes = inventoryState.map((item) => item.category);
return itemTypes.length === new Set(itemTypes).size;
},
isNameUnique(name) {
return !this.state.character.entries.has(name);
},
getRandomBaseIndex() {
const { helper } = this.facets;
const { character: characterState } = this.state;
const number = Math.floor(
helper.randomNumber() * characterState.bases.getSize(),
);
return Array.from(characterState.bases.keys())[number];
},
/**
*
* @param {Array<[number, BaseCharacter]>} baseCharacters
*/
initializeBaseCharacters(baseCharacters) {
const { character: characterState } = this.state;
if (characterState.bases.getSize() > 0) return;
addAllToMap(characterState.bases, baseCharacters);
},
/**
* @param {string} path
*/
async makeInventoryRecorderKit(path) {
const node = await E(characterNode).makeChildNode(
`inventory-${path}`,
);
return makeRecorderKit(
node,
/** @type {import('@agoric/zoe/src/contractSupport/recorder.js').TypedMatcher<Array<[Item, bigint]>>} */ (
M.arrayOf([ItemGuard, M.nat()])
),
);
},
mint() {
/**
* @param {ZCFSeat} seat
* @param {object} offerArgs
* @param {string} offerArgs.name
*/
const handler = async (seat, offerArgs) => {
const {
helper,
character: characterFacet,
item,
market: marketFacet,
} = this.facets;
const { character: characterState } = this.state;
const { give } = seat.getProposal();
mustMatch(
offerArgs,
M.splitRecord({
name: M.string(harden({ stringLengthLimit: 20 })),
}),
'offerArgs',
);
const newCharacterName = offerArgs.name;
AmountMath.isGTE(give.Price, mintFeeAmount) ||
assert.fail(errors.mintFeeTooLow);
!characterState.entries.get('names').includes(newCharacterName) ||
assert.fail(errors.nameTaken(newCharacterName));
characterState.bases.getSize() > 0 || assert.fail(errors.allMinted);
const re = /^[a-zA-Z0-9_-]*$/;
(re.test(newCharacterName) && newCharacterName !== 'names') ||
assert.fail(errors.invalidName);
const baseIndex = characterFacet.getRandomBaseIndex();
const baseCharacter = characterState.bases.get(baseIndex);
characterState.bases.delete(baseIndex);
characterState.entries.set(
'names',
harden([
...characterState.entries.get('names'),
newCharacterName,
]),
);
// for @jessie.js/safe-await-operator
await null;
try {
const currentTime = await helper.getTimeStamp();
const [newCharacterAmount1, newCharacterAmount2] =
makeCharacterNftObjs(
newCharacterName,
baseCharacter,
characterState.entries.getSize(),
currentTime,
).map((character) =>
AmountMath.make(
characterBrand,
makeCopyBag(harden([[character, 1n]])),
),
);
const { zcfSeat, userSeat } = zcf.makeEmptySeatKit();
const { zcfSeat: inventorySeat } = zcf.makeEmptySeatKit();
// Mint character to user seat & inventorySeat
characterMint.mintGains({ Asset: newCharacterAmount1 }, seat);
characterMint.mintGains(
{ CharacterKey: newCharacterAmount2 },
inventorySeat,
);
const inventoryKit =
await characterFacet.makeInventoryRecorderKit(newCharacterName);
await item.mintDefaultBatch(inventorySeat);
const royaltyFee = multiplyBy(give.Price, mintRoyaltyRate);
const platformFee = multiplyBy(give.Price, mintPlatformFeeRate);
/** @type {TransferPart[]} */
const transfers = [];
transfers.push([
seat,
zcfSeat,
{ Price: royaltyFee },
{ Royalty: royaltyFee },
]);
transfers.push([
seat,
zcfSeat,
{ Price: platformFee },
{ PlatformFee: platformFee },
]);
try {
atomicRearrange(zcf, harden(transfers));
} catch (e) {
assert.fail(errors.rearrangeError);
}
seat.exit();
zcfSeat.exit();
const payouts = await E(userSeat).getPayouts();
const royaltyPayout = await payouts.Royalty;
const platformFeePayout = await payouts.PlatformFee;
await E(royaltyDepositFacet).receive(royaltyPayout);
await E(platformFeeDepositFacet).receive(platformFeePayout);
// Add to state
const character = {
name: newCharacterName,
character: newCharacterAmount1.value.payload[0][0],
inventory: inventorySeat,
inventoryKit,
history: [
{
type: 'mint',
data: newCharacterAmount1.value[0],
timestamp: currentTime,
},
],
};
addAllToMap(characterState.entries, [
[character.name, harden(character)],
]);
// update metrics
marketFacet.updateMetrics('character', {
collectionSize: true,
averageLevel: {
type: 'add',
value: character.character.level,
},
});
characterKit.recorder.write(
// write `character` minus `seat` prop
(({ seat: _omitSeat, ...char }) => char)(character),
);
inventoryKit.recorder.write(
inventorySeat.getAmountAllocated('Item').value.payload,
);
return text.mintCharacterReturn;
} catch (e) {
// restore base char deletion and and name entry
addAllToMap(characterState.bases, [[baseIndex, baseCharacter]]);
characterState.entries.set(
'names',
harden(
characterState.entries
.get('names')
.filter((name) => name !== newCharacterName),
),
);
return e;
}
};
return zcf.makeInvitation(
handler,
'mintCharacterNfts',
undefined,
undefined,
);
},
equip() {
/**
* @param {ZCFSeat} seat
*/
const handler = (seat) => {
const { character: characterFacet } = this.facets;
const { character: characterState } = this.state;
// Retrieve Items and Inventory key from user seat
const providedItemAmount = seat.getAmountAllocated('Item');
const providedCharacterKeyAmount =
seat.getAmountAllocated('CharacterKey1');
const providedCharacterKey =
providedCharacterKeyAmount.value.payload[0][0];
const characterName = providedCharacterKey.name;
// Find characterRecord entry based on provided key
const characterRecord = characterState.entries.get(characterName);
const inventorySeat = characterRecord.inventory;
const { want } = seat.getProposal();
const { CharacterKey2: wantedCharacter } = want;
// Get current Character Key from inventorySeat
const inventoryCharacterKey =
inventorySeat.getAmountAllocated('CharacterKey');
inventoryCharacterKey || assert.fail(errors.noKeyInInventory);
AmountMath.isEqual(
wantedCharacter,
inventoryCharacterKey,
characterBrand,
) || assert.fail(errors.inventoryKeyMismatch);
// Ensure inventory STATE will be valid before reallocation
let inventory = inventorySeat
.getCurrentAllocation()
.Item.value.payload.map(([value, _supply]) => value);
if (providedItemAmount.value.payload[0])
inventory = [
...inventory,
providedItemAmount.value.payload[0][0],
];
characterFacet.validateInventoryState(inventory) ||
assert.fail(errors.duplicateCategoryInInventory);
/** @type {TransferPart[]} */
const transfers = [];
transfers.push([seat, inventorySeat, { Item: providedItemAmount }]);
transfers.push([
seat,
inventorySeat,
{ CharacterKey1: providedCharacterKeyAmount },
{ CharacterKey: providedCharacterKeyAmount },
]);
transfers.push([
inventorySeat,
seat,
{ CharacterKey: inventoryCharacterKey },
{ CharacterKey2: inventoryCharacterKey },
]);
try {
atomicRearrange(zcf, harden(transfers));
} catch (e) {
assert.fail(errors.rearrangeError);
}
characterRecord.inventoryKit.recorder.write(
inventorySeat.getAmountAllocated('Item').value.payload,
);
seat.exit();
return text.equipReturn;
};
return zcf.makeInvitation(
handler,
'addToInventory',
undefined,
M.splitRecord({
give: {
CharacterKey1: M.splitRecord(characterShape),
Item: M.splitRecord(itemShape),
},
want: {
CharacterKey2: M.splitRecord(characterShape),
},
}),
);
},
unequip() {
/**
* @param {ZCFSeat} seat
*/
const handler = async (seat) => {
const { character: characterState } = this.state;
// Retrieve Character key from user seat
const providedCharacterKeyAmount =
seat.getAmountAllocated('CharacterKey1');
const providedCharacterKey =
providedCharacterKeyAmount.value.payload[0][0];
const characterName = providedCharacterKey.name;
// Find character record entry based on provided key
const characterRecord = characterState.entries.get(characterName);
const inventorySeat = characterRecord.inventory;
providedCharacterKey || assert.fail(errors.invalidCharacterKey);
// Get reference to the wanted items and key
const { want } = seat.getProposal();
const { Item: requestedItems, CharacterKey2: wantedCharacter } =
want;
const inventoryCharacterKey =
inventorySeat.getAmountAllocated('CharacterKey');
inventoryCharacterKey || assert.fail(errors.noKeyInInventory);
// Ensure requested key and inventory key match
AmountMath.isEqual(
wantedCharacter,
inventoryCharacterKey,
characterBrand,
) || assert.fail(errors.inventoryKeyMismatch);
/** @type {TransferPart[]} */
const transfers = [];
transfers.push([inventorySeat, seat, { Item: requestedItems }]);
transfers.push([
seat,
inventorySeat,
{ CharacterKey1: providedCharacterKeyAmount },
{ CharacterKey: providedCharacterKeyAmount },
]);
transfers.push([
inventorySeat,
seat,
{ CharacterKey: wantedCharacter },
{ CharacterKey2: wantedCharacter },
]);
try {
atomicRearrange(zcf, harden(transfers));
} catch (e) {
assert.fail(errors.rearrangeError);
}
characterRecord.inventoryKit.recorder.write(
inventorySeat.getAmountAllocated('Item').value.payload,
);
seat.exit();
return text.unequipReturn;
};
return zcf.makeInvitation(
handler,
'removeFromInventory',
undefined,
M.splitRecord({
give: {
CharacterKey1: M.splitRecord(characterShape),
},
want: {
CharacterKey2: M.splitRecord(characterShape),
Item: M.splitRecord(itemShape),
},
}),
);
},
swap() {
/**
* @param {ZCFSeat} seat
*/
const handler = (seat) => {
const { character: characterFacet } = this.facets;
const { character: characterState } = this.state;
// Retrieve Items and Inventory key from user seat
const providedItemAmount = seat.getAmountAllocated('Item1');
const providedCharacterKeyAmount =
seat.getAmountAllocated('CharacterKey1');
const providedCharacterKey =
providedCharacterKeyAmount.value.payload[0][0];
// const providedItems = providedItemAmount.value;
const characterName = providedCharacterKey.name;
// Find character record entry based on provided key
const characterRecord = characterState.entries.get(characterName);
const inventorySeat = characterRecord.inventory;
providedCharacterKey || assert.fail(errors.invalidCharacterKey);
const { want } = seat.getProposal();
const {
CharacterKey2: wantedCharacterAmount,
Item2: wantedItemsAmount,
} = want;
// Ensure requested key and inventory key match
const inventoryCharacterKey =
inventorySeat.getAmountAllocated('CharacterKey');
inventoryCharacterKey || assert.fail(errors.noKeyInInventory);
AmountMath.isEqual(
wantedCharacterAmount,
inventoryCharacterKey,
characterBrand,
) || assert.fail(errors.inventoryKeyMismatch);
// Ensure inventory STATE is valid before reallocation
let inventory = inventorySeat
.getCurrentAllocation()
.Item.value.payload.map(([value, _supply]) => value);
if (wantedItemsAmount.value.payload[0])
inventory = inventory.filter(
(item) =>
item.category !==
wantedItemsAmount.value.payload[0][0].category,
);
if (providedItemAmount.value.payload[0])
inventory = [
...inventory,
providedItemAmount.value.payload[0][0],
];
characterFacet.validateInventoryState(inventory) ||
assert.fail(errors.duplicateCategoryInInventory);
/** @type {TransferPart[]} */
const transfers = [];
transfers.push([
seat,
inventorySeat,
{ Item1: providedItemAmount },
{ Item: providedItemAmount },
]);
transfers.push([
inventorySeat,
seat,
{ Item: wantedItemsAmount },
{ Item2: wantedItemsAmount },
]);
transfers.push([
seat,
inventorySeat,
{ CharacterKey1: providedCharacterKeyAmount },
{ CharacterKey: providedCharacterKeyAmount },
]);
transfers.push([
inventorySeat,
seat,
{ CharacterKey: wantedCharacterAmount },
{ CharacterKey2: wantedCharacterAmount },
]);
try {
atomicRearrange(zcf, harden(transfers));
} catch (e) {
assert.fail(errors.rearrangeError);
}
characterRecord.inventoryKit.recorder.write(
inventorySeat.getAmountAllocated('Item').value.payload,
);
seat.exit();
};
return zcf.makeInvitation(
handler,
'itemInventorySwap',
undefined,
M.splitRecord({
give: {
CharacterKey1: M.splitRecord(characterShape),
Item1: M.splitRecord(itemShape),
},
want: M.splitRecord(
{
CharacterKey2: M.splitRecord(characterShape),
},
{ Item2: M.splitRecord(itemShape) },
),
}),
);
},
unequipAll() {
/**
* @param {ZCFSeat} seat
*/
const handler = (seat) => {
const { character: characterState } = this.state;
// Retrieve Character key from user seat
const providedCharacterKeyAmount =
seat.getAmountAllocated('CharacterKey1');
const providedCharacterKey =
providedCharacterKeyAmount.value.payload[0][0];
const characterName = providedCharacterKey.name;
// Find character record entry based on provided key
const characterRecord = characterState.entries.get(characterName);
const inventorySeat = characterRecord.inventory;
providedCharacterKey || assert.fail(errors.invalidCharacterKey);
// Get reference to the wanted item
const { want } = seat.getProposal();
const { CharacterKey2: wantedCharacter } = want;
// Get Character Key from inventorySeat
const inventoryCharacterKey =
inventorySeat.getAmountAllocated('CharacterKey');
inventoryCharacterKey || assert.fail(errors.noKeyInInventory);
const items = inventorySeat.getAmountAllocated('Item', itemBrand);
AmountMath.isEqual(
wantedCharacter,
inventoryCharacterKey,
characterBrand,
) || assert.fail(errors.inventoryKeyMismatch);
/** @type {TransferPart[]} */
const transfers = [];
transfers.push([inventorySeat, seat, { Item: items }]);
transfers.push([
seat,
inventorySeat,
{ CharacterKey1: providedCharacterKeyAmount },
{ CharacterKey: providedCharacterKeyAmount },
]);
transfers.push([
inventorySeat,
seat,
{ CharacterKey: wantedCharacter },
{ CharacterKey2: wantedCharacter },
]);
try {
atomicRearrange(zcf, harden(transfers));
} catch (e) {
assert.fail(errors.rearrangeError);
}
seat.exit();
characterRecord.inventoryKit.recorder.write(
inventorySeat.getAmountAllocated('Item').value.payload,
);
};
return zcf.makeInvitation(
handler,
'removeAllItemsFromInventory',
undefined,
M.splitRecord({
give: {
CharacterKey1: M.splitRecord(characterShape),
},
want: {
CharacterKey2: M.splitRecord(characterShape),
},
}),
);
},
},
item: {
/**
* @param {Item[]} baseItems
*/
initializeBaseItems(baseItems) {
const { item: itemState } = this.state;
if (itemState.bases.getSize() > 0) return;
const common = [];
const uncommonToLegendary = [];
baseItems.forEach((item) => {
if (item.rarity < minUncommonRating) common.push(item);
else uncommonToLegendary.push(item);
});
addAllToMap(itemState.bases, [
['common', harden(common)],
['uncommonToLegendary', harden(uncommonToLegendary)],
]);
},
// Mints the default set of items to a seat that doesn't exit
/**
* @param {ZCFSeat} seat
*/
async mintDefaultBatch(seat) {
const { helper, market: marketFacet } = this.facets;
const { item: itemState } = this.state;
let commonBases = itemState.bases.get('common');
const index1 = Math.floor(helper.randomNumber() * commonBases.length);
const item1 = commonBases[index1];
commonBases = commonBases.filter(
(item) => item.category !== item1.category,
);
const index2 = Math.floor(helper.randomNumber() * commonBases.length);
const item2 = commonBases[index2];
const uncommonToLegendary = itemState.bases
.get('uncommonToLegendary')
.filter(
(item) =>
item.category !== item1.category &&
item.category !== item2.category,
);
const index3 = Math.floor(
helper.randomNumber() * uncommonToLegendary.length,
);
const item3 = uncommonToLegendary[index3];
const items = [item1, item2, item3];
const currentTime = await helper.getTimeStamp();
const newItemAmount = AmountMath.make(
itemBrand,
makeCopyBag(harden(items.map((item) => [item, 1n]))),
);
await itemMint.mintGains({ Item: newItemAmount }, seat);
let id = itemState.entries.getSize();
items.forEach((i) => {
const item = {
id,
item: i,
history: [
{
type: 'mint',
data: i,
timestamp: currentTime,
},
],
};
addAllToMap(itemState.entries, [[id, harden(item)]]);
itemKit.recorder.write(item);
id += 1;
// update metrics
marketFacet.updateMetrics('item', {
collectionSize: true,
averageLevel: {
type: 'add',
value: item.item.level,
},
});
});
return text.mintItemReturn;
},
/**
*
* @param {ZCFSeat} seat
* @param {[Item, bigint][]} itemBatch
* @returns {Promise<string>}
*/
async mintBatch(seat, itemBatch) {
const { helper, market: marketFacet } = this.facets;
const { item: itemState } = this.state;
const currentTime = await helper.getTimeStamp();
const newItemAmount = AmountMath.make(
itemBrand,
makeCopyBag(harden(itemBatch)),
);
await itemMint.mintGains({ Item: newItemAmount }, seat);
let id = itemState.entries.getSize();
itemBatch.forEach((copyBagEntry) => {
const [itemAsset, itemSupply] = copyBagEntry;
for (let n = 0; n < itemSupply; n += 1) {
const item = {
id,
item: itemAsset,
history: [
{
type: 'mint',
data: itemAsset,
timestamp: currentTime,
},
],
};
addAllToMap(itemState.entries, [[id, harden(item)]]);
itemKit.recorder.write(item);
id += 1;
// update metrics
marketFacet.updateMetrics('item', {
collectionSize: true,
averageLevel: {
type: 'add',
value: item.item.level,
},
});
}
});
return text.mintItemReturn;
},
mint() {
/**
* @param {ZCFSeat} seat
*/
const handler = async (seat) => {
const { helper, market: marketFacet } = this.facets;
const { item: itemState } = this.state;
const { want } = seat.getProposal();
const currentTime = await helper.getTimeStamp();
const items = want.Item.value.payload.map(([item, supply]) => {
return [item, supply];
});
const newItemAmount = AmountMath.make(
itemBrand,
makeCopyBag(harden(items)),
);
itemMint.mintGains({ Asset: newItemAmount }, seat);
seat.exit();
let id = itemState.entries.getSize();
items.forEach((j) => {
const i = j[0];
const item = {
id,
item: i,
// Potentially have separate durable stores for the history
history: [
{
type: 'mint',
data: i,
timestamp: currentTime,
},
],
};
addAllToMap(itemState.entries, [[id, harden(item)]]);
itemKit.recorder.write(item);
id += 1;
// update metrics
marketFacet.updateMetrics('item', {
collectionSize: true,
averageLevel: {
type: 'add',
value: item.item.level,
},
});
});
return text.mintItemReturn;
};
return zcf.makeInvitation(
handler,
'mintItemNfts',
undefined,