signmessage

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.

Argument #1 - address

Type: string, required

The bitcoin address to use for the private key.

Argument #2 - message

Type: string, required

The message to create a signature of.

Result

Name	Type	Description
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/