Combine multiple partially signed transactions into one transaction.
The combined transaction may be another partially signed transaction or a
fully signed transaction.
1. txs (json array, required) A json array of hex strings of partially signed transactions
"hexstring", (string) A transaction hash
"str" (string) The hex-encoded raw transaction with signature(s)
> bitcoin-cli combinerawtransaction ["myhex1", "myhex2", "myhex3"]