How to Bridge SPS Between Splinterlands and Base (Guide) - by 
@bamlolx and 
@endecs
Since we don't have a dedicated UI yet, but many users are eager to bridge their SPS tokens to Base, here's a simple guide. You can do this yourself without any programming knowledge.
Go to the Broadcaster Page:
First, navigate to the following page:
https://playground.splinterlands.com/broadcaster.html
This page allows you to broadcast a custom_json operation to the Hive blockchain. (Once our UI is ready, this process will be handled automatically in the background).
Fill in the Broadcast Form:
ID (Type of custom_json):
Enter: sm_token_transfer
Key Type:
Select: Active
The Active key is required for token transfers.
Display Message:
This field doesn't matter; you can type anything here.
Hive Account:
Enter the username of the Splinterlands account you are transferring SPS from.
CustomJson Code:
Paste the following JSON structure into this field. This is the most important part.
custom_json:
{
"to": "spsonbase",
"token": "SPS",
"qty": 1,
"memo": "bridge:validator-base-sps:0x5C17E1F79B151db0073bdBAd9cF39137661c1529"
}
Explanation of the JSON fields:
qty: The amount of SPS you want to transfer from your in-game balance to Base.
memo: CRITICAL – You must replace the address 0x5C17E1F79B151db0073bdBAd9cF39137661c1529 with your own Base wallet address.
⚠️ WARNING: Always test with a small amount first! If you make a mistake in the memo field (e.g., a wrong address), your SPS will be lost permanently.
View Your SPS on Base (e.g., in MetaMask):
Once the bridge is complete, to see your SPS tokens in your wallet (like MetaMask), you need to import the token:
- select Base Mainnet
- click on the 3 dots
- Import tokens
- Custom token - Base Mainnet
For the Token Contract Address, use:
0x578661E9A09Eee6b2cd97D4Ded1CCBaE7B8516B9
The token symbol (SPS) and decimals should auto-populate.
Bridging SPS from Base Back to Splinterlands
The process for sending SPS from Base back to Splinterlands is more complicated from a user's perspective. Currently, I haven't found a simple method. This typically means a user would need to use a developer-oriented tool or a custom-built dApp interface.
If anyone in the community knows of a simpler, user-friendly way to initiate this reverse bridge (e.g., a public dApp website), please send me a direct message (DM). I will gladly update this guide with the instructions.
Guide how to buy sps on coinbase by 
@seattlea
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