signmessage "address" "message"
Sign a message with the private key of an address
Requires wallet passphrase to be set with walletpassphrase call if wallet is encrypted.
Arguments
1. address (string, required) The bitcoin address to use for the private key.
2. message (string, required) The message to create a signature of.
Result
"str" (string) The signature of the message encoded in base 64
Examples
Unlock the wallet for 30 seconds
> bitcoin-cli walletpassphrase "mypassphrase" 30
Create the signature
> bitcoin-cli signmessage "1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX" "my message"
Verify the signature
> bitcoin-cli verifymessage "1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX" "signature" "my message"
As a JSON-RPC call
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id": "curltest", "method": "signmessage", "params": ["1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX", "my message"]}' -H 'content-type: text/plain;' http://127.0.0.1:8332/