sulting raw transaction (base64-encoded string)
  "fee" : n,          (numeric) Fee in BTC the resulting transaction pays
  "changepos" : n     (numeric) The position of the added change output, or -1
}

Examples:

Create a transaction with no inputs
> bitcoin-cli walletcreatefundedpsbt "[{\"txid\":\"myid\",\"vout\":0}]" "[{\"data\":\"00010203\"}]"


