buyMembership.ts

import FeeProfileCommandBase from '../../base/FeeProfileCommandBase'
import { flags } from '@oclif/command'
import _ from 'lodash'
import { IMembershipMetadata, MembershipMetadata } from '@joystream/metadata-protobuf'
import { metadataToBytes } from '../../helpers/serialization'
import { createType } from '@joystream/types'
import chalk from 'chalk'
import { formatBalance } from '@polkadot/util'

const DEFAULT_HANDLE_LENGTH = 10
const DEFAULT_NAME_LENGTH = 10
const DEFAULT_ABOUT_LENGTH = 0
const DEFAULT_AVATAR_URI_LENGTH = 25
const DEFAULT_EXTERNAL_RESOURCES_COUNT = 1
const DEFAULT_EXTERNAL_RESOURCE_LENGTH = 25

export default class FeeProfileBuyMembershipCommand extends FeeProfileCommandBase {
  static description = 'Create fee profile of members.buy_membership extrinsic.'

  static flags = {
    handleLength: flags.integer({
      char: 'h',
      default: DEFAULT_HANDLE_LENGTH,
      description: 'Length of the membership handle to use for estimating tx fee',
    }),
    nameLength: flags.integer({
      char: 'n',
      default: DEFAULT_NAME_LENGTH,
      description: "Length of the member's name (part of metadata) to use for estimating tx fee",
    }),
    aboutLength: flags.integer({
      char: 'a',
      default: DEFAULT_ABOUT_LENGTH,
      description: "Length of the member's about text (part of metadata) to use for estimating tx fee",
    }),
    avatarUriLength: flags.integer({
      char: 'u',
      default: DEFAULT_AVATAR_URI_LENGTH,
      description: "Length of the member's avatar uri (part of metadata) to use for estimating tx fee",
    }),
    externalResourcesCount: flags.integer({
      char: 'E',
      default: DEFAULT_EXTERNAL_RESOURCES_COUNT,
      description: 'Number of external resources (part of metadata) to use for estimating tx fee',
    }),
    externalResourceLength: flags.integer({
      char: 'e',
      default: DEFAULT_EXTERNAL_RESOURCE_LENGTH,
      description: 'Length of a single external resource url (part of metadata) to use for estimating tx fee',
    }),
    ...super.flags,
  }

  async run(): Promise<void> {
    const api = this.getOriginalApi()
    const { handleLength, nameLength, aboutLength, avatarUriLength, externalResourcesCount, externalResourceLength } =
      this.parse(FeeProfileBuyMembershipCommand).flags
    const membershipPrice = await api.query.members.membershipPrice()

    this.log(`Membership price: ${chalk.cyanBright(formatBalance(membershipPrice))}`)
    this.log('Parameters:')
    this.jsonPrettyPrint(
      JSON.stringify({
        handleLength,
        nameLength,
        aboutLength,
        avatarUriLength,
        externalResourcesCount,
        externalResourceLength,
      })
    )

    const metadata: IMembershipMetadata = {
      name: _.repeat('x', nameLength),
      about: _.repeat('x', aboutLength),
      avatarUri: _.repeat('x', avatarUriLength),
      externalResources: Array.from({ length: externalResourcesCount }, () => ({
        type: MembershipMetadata.ExternalResource.ResourceType.HYPERLINK,
        value: _.repeat('x', externalResourceLength),
      })),
    }

    const tx = api.tx.members.buyMembership(
      createType('PalletMembershipBuyMembershipParameters', {
        handle: _.repeat('x', handleLength),
        rootAccount: this.pairs.alice.address,
        controllerAccount: this.pairs.bob.address,
        metadata: metadataToBytes(MembershipMetadata, metadata),
        referrerId: null,
      })
    )
    const extraCosts = { membershipPrice }
    await this.profile(tx, extraCosts)
  }
}