gettxoutproof JSON-RPC command

gettxoutproof ["txid",...] ( "blockhash" )

Returns a hex-encoded proof that "txid" was included in a block.

NOTE: By default this function only works sometimes. This is when there is an
unspent output in the utxo for this transaction. To make it always work,
you need to maintain a transaction index, using the -txindex command line option or
specify the block in which the transaction is included manually (by blockhash).

Arguments

1. txids          (json array, required) A json array of txids to filter
     [
       "txid",    (string) A transaction hash
       ...
     ]
2. "blockhash"    (string, optional) If specified, looks for txid in the block with this hash

Result

"data"           (string) A string that is a serialized, hex-encoded data for the proof.

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Bitcoin Cash Node Daemon version v27.1.1-1ce1d89

Documentation on docs.bitcoincashnode.org reflects the current master branch in Git, and may include API changes that are not yet present in the latest release.