Issue Details

Number: 28636
Title: new RPC: sendrawtransactiontopeer
Description: ### Please describe the feature you'd like to see added. new RPC `sendrawtransactiontopeer`, which sends the raw transaction to a specified peer ### Is your feature related to a problem, if so please describe it. Using `sendrawtransactiontopeer` can be useful for the user when it has a peer it trusts (privacy wise) and wants to (re)broadcast a transaction (to that specific peer). Specifically for rebroadcasting, as `sendrawtransaction` doc contains a fair warning: _using sendrawtransaction for manual rebroadcast may degrade privacy by leaking the transaction's origin_. So using a specific trusted peer to rebroadcast seems reasonable. Additionally, user might have a Transport v2 connection and it's biggest worry is his ISP spying on him. In this case the user might want to use (one of) his v2 connected peers for (re)broadcasting the tx. ### Describe the solution you'd like new RPC `sendrawtransactiontopeer`, where the raw tx and peer are specified (somewhat similar to `sendmsgtopeer`) ### Describe any alternatives you've considered - [have an argument in `sendrawtransaction` to specify a peer](https://github.com/bitcoin/bitcoin/issues/21876#issue-879140859) - [ _use -connect=<ip> to connect only to the specified node(s)._](https://github.com/bitcoin/bitcoin/issues/21876#issuecomment-1212166950) (for this, the user would need to restart and disconnect all other peers every time he wants to do it) ### Please leave any additional context https://github.com/bitcoin/bitcoin/issues/21876, similar request but suggesting to add an argument in `sendrawtransaction` to mention the peer https://github.com/bitcoin/bitcoin/pull/27509, useful but `sendrawtransactiontopeer` would still be a good addition imo **Could this be used by malicious parties (who want to get a better view of the network etc)?** Maybe, but they might already be doing that with a modified client. In contrary, `sendrawtransactiontopeer` might make transaction broadcast/relay analysis harder.
URL: https://github.com/bitcoin/bitcoin/issue/28636
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