Steps to reproduce on regtest:

```
converttopsbt 02000000000101ab73dba46508bacdb49a988ddd74bc9d39c9cb7e057af060ca8c6b6861e28e3c0300000000feffffff02b828d0b20000000017a914d1954862afd728fbb055149002958e1d1b9e1f0b8700ca9a3b0000000017a91442170ccb3441cff1723af9afab6f2553103e1d578702473044022077380c6e16496d9905aef120694c329be51522847cb5d53fa74b94698c95678d02202d32c46e0e17420a83dee830fefda7d40529182f5d82be47c2b49a7b83214ab50121026d483d6628dcc3ef6e3ab9ed4937c452c263c7e0ac80eb4be97426d5da8f640500000000
```
or 
```
converttopsbt 02000000000101ab73dba46508bacdb49a988ddd74bc9d39c9cb7e057af060ca8c6b6861e28e3c0300000000feffffff02b828d0b20000000017a914d1954862afd728fbb055149002958e1d1b9e1f0b8700ca9a3b0000000017a91442170ccb3441cff1723af9afab6f2553103e1d578702473044022077380c6e16496d9905aef120694c329be51522847cb5d53fa74b94698c95678d02202d32c46e0e17420a83dee830fefda7d40529182f5d82be47c2b49a7b83214ab50121026d483d6628dcc3ef6e3ab9ed4937c452c263c7e0ac80eb4be97426d5da8f640500000000 false
```

Further reading: #13738
{
    if (request.fHelp || request.params.size() != 1) {
        throw std::runtime_error(
            RPCHelpMan{"analyzepsbt",
            "\nAnalyzes and provides information about the current status of a PSBT and its inputs\n",
            {
                {"psbt", RPCArg::Type::STR, RPCArg::Optional::NO, "A base64 string of a PSBT"}
            },
            RPCResult {
                "{\n"
                "  \"inputs\" : [                      (array of json objects)\n"
                "    {\n"
                "      \"has_utxo\" : true|false     (boolean) Whether a UTXO is provided\n"
                "      \"is_final\" : true|false     (boolean) Whether the input is finalized\n"
                "      \"missing\" : {               (json object, optional) Things that are missing that are required to complete this input\n"
                "        \"pubkeys\" : [             (array, optional)\n"
                "          \"keyid\"                 (string) Public key ID, hash160 of the public key, of a public key whose BIP 32 derivation path is missing\n"
                "        ]\n"
                "        \"signatures\" : [          (array, optional)\n"
                "          \"keyid\"                 (string) Public key ID, hash160 of the public key, of a public key whose signature is missing\n"
                "        ]\n"
                "        \"redeemscript\" : \"hash\"   (string, optional) Hash160 of the redeemScript that is missing\n"
                "        \"witnessscript\" : \"hash\"  (string, optional) SHA256 of the witnessScript that is missing\n"
                "      }\n"
                "      \"next\" : \"role\"             (string, optional) Role of the next person that this input needs to go to\n"
                "    }\n"
                "    ,...\n"
                "  ]\n"
                "  \"estimated_vsize\" : vsize       (numeric, optional) Estimated vsize of the final signed transaction\n"
                "  \"estimated_feerate\" : feerate   (numeric, optional) Estimated feerate of the final signed transaction in " + CURRENCY_UNIT + "/kB. Shown only if all UTXO slots in the PSBT have been filled.\n"