XYOracleNetwork/sdk-archivist-nodejs

import {
  XyoCatalogFlags,
  XyoProcedureCatalog,
} from '@xyo-network/sdk-core-nodejs'

export const receiveProcedureCatalog: XyoProcedureCatalog = {
  canDo: (buffer: Buffer): boolean => {
    if (buffer.length < 1) {
      return false
    }

    const catalogueInt = buffer.readUInt8(0)
    return (
      (catalogueInt &
        (XyoCatalogFlags.GIVE_ORIGIN_CHAIN | XyoCatalogFlags.BOUND_WITNESS)) !==
      0
    )
  },
  choose: (catalog: Buffer): Buffer => {
    if (catalog.length < 1) {
      throw new Error('Catalogue must have at least a byte')
    }

    const catalogueInt = catalog.readUInt8(catalog.length - 1)

    if ((catalogueInt & XyoCatalogFlags.GIVE_ORIGIN_CHAIN) !== 0) {
      return Buffer.from([XyoCatalogFlags.TAKE_ORIGIN_CHAIN])
    }

    return Buffer.from([XyoCatalogFlags.BOUND_WITNESS])
  },

  getEncodedCanDo: () => {
    return Buffer.from([
      XyoCatalogFlags.TAKE_ORIGIN_CHAIN | XyoCatalogFlags.BOUND_WITNESS,
    ])
  },
}