The lockunspent RPC updates list of temporarily unspendable outputs. Temporarily lock (unlock=false) or unlock (unlock=true) specified transaction outputs. If no transaction outputs are specified when unlocking then all current locked transaction outputs are unlocked.
lockunspent unlock ([{"txid":"txid","vout":n},...])
*bitcoin-cli help lockunspent
lockunspent unlock ( [{"txid":"hex","vout":n},...] persistent )
Updates list of temporarily unspendable outputs.
Temporarily lock (unlock=false) or unlock (unlock=true) specified transaction outputs.
If no transaction outputs are specified when unlocking then all current locked transaction outputs are unlocked.
A locked transaction output will not be chosen by automatic coin selection, when spending bitcoins.
Manually selected coins are automatically unlocked.
Locks are stored in memory only, unless persistent=true, in which case they will be written to the
wallet database and loaded on node start. Unwritten (persistent=false) locks are always cleared
(by virtue of process exit) when a node stops or fails. Unlocking will clear both persistent and not.
Also see the listunspent call
Arguments:
1. unlock (boolean, required) Whether to unlock (true) or lock (false) the specified transactions
2. transactions (json array, optional, default=[]) The transaction outputs and within each, the txid (string) vout (numeric).
[
{ (json object)
"txid": "hex", (string, required) The transaction id
"vout": n, (numeric, required) The output number
},
...
]
3. persistent (boolean, optional, default=false) Whether to write/erase this lock in the wallet database, or keep the change in memory only. Ignored for unlocking.
Result:
true|false (boolean) Whether the command was successful or not
Examples:
List the unspent transactions
> bitcoin-cli listunspent
Lock an unspent transaction
> bitcoin-cli lockunspent false "[{\"txid\":\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\",\"vout\":1}]"
List the locked transactions
> bitcoin-cli listlockunspent
Unlock the transaction again
> bitcoin-cli lockunspent true "[{\"txid\":\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\",\"vout\":1}]"
Lock the transaction persistently in the wallet database
> bitcoin-cli lockunspent false "[{\"txid\":\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\",\"vout\":1}]" true
As a JSON-RPC call
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "lockunspent", "params": [false, "[{\"txid\":\"a08e6907dbbd3d809776dbfc5d82e371b764ed838b5655e72f463568df1aadf0\",\"vout\":1}]"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/