musig.partial_sign

musig.partial_sign "txid" input_index Compute MuSig2 partial signature for an input using adaptor challenge e' = H(R' || Q || m). IMPORTANT: Uses R' (adaptor nonce) not R (base nonce) for challenge computation. Arguments: 1. txid (string, required) Transaction ID 2. input_index (numeric, required) Input index Result: { (json object) "partial_sig" : "hex" (string) Partial signature (32 bytes) } Examples: > bitcoin-cli musig.partial_sign "txid" 0

Signature

musig.partial_sign(txid: string, input_index: number) → any

Code samples

curl --user "$RPC_USER:$RPC_PASS" \
  --data-binary '{"jsonrpc":"1.0","id":"docs","method":"musig.partial_sign","params":["\"<txid>\"",0]}' \
  -H 'content-type: text/plain;' \
  http://127.0.0.1:8332/

bitcoin-cli musig.partial_sign "txid" 0

import requests
r = requests.post(
    "http://127.0.0.1:8332/",
    auth=("$RPC_USER", "$RPC_PASS"),
    json={
        "jsonrpc": "1.0",
        "id": "docs",
        "method": "musig.partial_sign",
        "params": ["\"<txid>\"", 0],
    },
    timeout=30,
)
print(r.json())

const res = await fetch("http://127.0.0.1:8332/", {
  method: "POST",
  headers: {
    "content-type": "application/json",
    "authorization": "Basic " + btoa(`${process.env.RPC_USER}:${process.env.RPC_PASS}`),
  },
  body: JSON.stringify({
    jsonrpc: "1.0",
    id: "docs",
    method: "musig.partial_sign",
    params: ["\"<txid>\"",0],
  }),
});
console.log(await res.json());

Parameters

Name	Type	Req.	Description
txid	`string`	yes	Transaction ID
input_index	`number`	yes	Input index

Result

Type: any

{ (json object) "partial_sig" : "hex" (string) Partial signature (32 bytes) }

Source: services/core-node/bcore/src/wallet/rpc/musig_adaptors.cpp:219

C++ symbol: musig_partial_sign

Code samples

curl --user "$RPC_USER:$RPC_PASS" \
  --data-binary '{"jsonrpc":"1.0","id":"docs","method":"musig.partial_sign","params":["\"<txid>\"",0]}' \
  -H 'content-type: text/plain;' \
  http://127.0.0.1:8332/

bitcoin-cli musig.partial_sign "txid" 0

import requests
r = requests.post(
    "http://127.0.0.1:8332/",
    auth=("$RPC_USER", "$RPC_PASS"),
    json={
        "jsonrpc": "1.0",
        "id": "docs",
        "method": "musig.partial_sign",
        "params": ["\"<txid>\"", 0],
    },
    timeout=30,
)
print(r.json())

const res = await fetch("http://127.0.0.1:8332/", {
  method: "POST",
  headers: {
    "content-type": "application/json",
    "authorization": "Basic " + btoa(`${process.env.RPC_USER}:${process.env.RPC_PASS}`),
  },
  body: JSON.stringify({
    jsonrpc: "1.0",
    id: "docs",
    method: "musig.partial_sign",
    params: ["\"<txid>\"",0],
  }),
});
console.log(await res.json());