This guide will teach you how to write a key value pair to the SPACE blockchain.

KV is available with Spacecoind or Spacecoin-QT.

Table of Contents

Please Note

With Spacecoin-QT the commands will need to be entered in the console. This is accessible at Help -> Debug Window -> Console.

Background Information

Key Value pairs expire after a specified amount of days.

The days are based on KMD’s 1440 blocks per day. Decide how many days you want and multiply by 2 because SPACE has 2880 blocks per day.

If your KV pair is going to expire you can follow the same steps to update it.


  1. Navigate to spacecoin-cli or Console depending on your wallet.

  2. Enter the command kvupdate key "value" days*2 passphrase.

    Example: kvupdate testing "This is my kv test value" 400 mytestingpassphrase

    This will output the KV entry with all of the relevant information.

      "coin": "tSPACE",
      "height": 153,
      "expiration": 145593,
      "flags": 401,
      "key": "testing",
      "keylen": 7,
      "value": "This is my kv test value",
      "valuesize": 24,
      "fee": 0.0017776,
      "txid": "55c037b75d548324e24da24cceb8353012b546d3d93cb03de34f837e82cf85a6"

You can now read this KV pair from the blockchain.