message: export missing class required to interact with rpc
diff: @@ -6,6 +6,7 @@ const BN = require('bn.js')
  const { MethodInit, MethodPaych } = require('./methods')
  const ExtendedKey = require('./extendedkey')
  +const FilecoinRPC = require('./utils/index')
  const { getDigest, getCoinTypeFromPath, addressAsBytes, bytesToAddress, tryToPrivateKeyBuffer } = require('./utils')
  const { ProtocolIndicator } = require('./constants')
  @@ -349,4 +350,5 @@ module.exports = {
  verifySignature,
  addressAsBytes,
  bytesToAddress,
  + FilecoinRPC,
  }
  