Create a market

const { marketAddress, metadataUri } = await client.createMarket({
  marketName: 'Will ETH be above 5k?',
  outcomes: ['Yes', 'No'],
  resolverKind: 'admin',
  marketAdmin: yourAddress,
  seedWei,           // omit for create-only
  oddsBps,           // required with seedWei
  metadata: {
    description: '…',
    resolutionCriteria: 'Coinbase ETH-USD at 23:59 UTC.',
    image: marketImageFile,
    outcomeImages: [yesFile, noFile],
  },
})

if (!marketAddress) {
  throw new Error('Created, but the receipt did not include the new address')
}

const market = client.market(marketAddress)

Promise<{
  result: unknown
  hashes: Hash[]
  marketAddress?: Address
  metadataUri?: string
}>