{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "satoshi",
    "feerate",
    "startweight"
  ],
  "properties": {
    "satoshi": {
      "type": "msat_or_all",
      "description": "the minimum satoshi value of the output(s) needed (or the string `all` meaning use all unreserved inputs). If a value, it can be a whole number, a whole number ending in *sat*, a whole number ending in *000msat*, or a number with 1 to 8 decimal places ending in *btc*"
    },
    "feerate": {
      "type": "feerate",
      "description": "used for the transaction as initial feerate. The default is *normal*"
    },
    "startweight": {
      "type": "u32",
      "description": "the weight of the transaction before *fundpsbt* has added any inputs"
    },
    "minconf": {
      "type": "u32",
      "description": "the minimum number of confirmations that used outputs should have. Default is 1"
    },
    "reserve": {
      "type": "u32",
      "description": "if not zero, then *reserveinputs* is called (successfully, with *exclusive* true) on the returned PSBT for this number of blocks. Defaults to 72 blocks if unspecified"
    },
    "locktime": {
      "type": "u32",
      "description": "the locktime of the transaction. if not set, it is set to a recent block height"
    },
    "min_witness_weight": {
      "type": "u32",
      "description": "minimum weight to use for a UTXO's witness. If the actual witness weight is greater than the provided minimum, the actual witness weight will be used"
    },
    "excess_as_change": {
      "type": "boolean",
      "description": "flag to add a change output for the excess sats"
    },
    "nonwrapped": {
      "added": "v23.02",
      "type": "boolean",
      "description": "to signal to filter out any p2sh-wrapped inputs from funding this PSBT"
    },
    "opening_anchor_channel": {
      "added": "v23.08",
      "type": "boolean",
      "description": "to signel that it needs emergency reserve for anchors so that we can lowball our commitment tx fees, and min-emergency-msat for reserving some sats for closing anchor channels"
    }
  }
}