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​
Parameters

​
chainId
string
default:"bitcoin-testnet"
required
Unique identifier for a blockchain network.
​
id
number
default:1
required
Request identifier used to match responses.
​
jsonrpc
string
default:"2.0"
required
JSON-RPC version.
​
method
string
default:"signrawtransactionwithkey"
required
JSON-RPC method name.
​
params
object
required
Parameters: [rawTx, privKeys, prevTxs?, sighashType?].Positional parameters for signrawtransactionwithkey:
  • params[0]: Raw transaction hex.
  • params[1]: Private keys in WIF format.
  • params[2]: Optional previous transaction outputs used for signing.
  • params[3]: Optional signature hash type (e.g., ALL).

​
Returns

​
result
object
Signed transaction result containing hex and completion flag.
curl --request POST \
  --url https://api.uniblock.dev/uni/v1/json-rpc?chainId=bitcoin-testnet \
  --header 'content-type: application/json' \
  --data '{
    "id": 1,
    "jsonrpc": "2.0",
    "method": "signrawtransactionwithkey",
    "params": [
      "",
      [],
      [],
      ""
    ]
  }'

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {}
}