Kora and web3 authentication

External question — Solana Stack Exchange Author: Arvie Pank Original post: https://solana.stackexchange.com/questions/23933 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. How do I integrate my web3 authentication with Kora? The use case is: Users are authenticated using web3 auth for seamless login All payment transactions on Solana for activities in app Today, the user has to pay for the SOL gas fees, but I want to replace that with Kora so the app pays for all gas fees and users don't have to pay any SOL gas fees.

External answer — Solana Stack Exchange Author: amilz Original post: https://solana.stackexchange.com/a/23937 License: CC BY-SA 4.0 — https://creativecommons.org/licenses/by-sa/4.0/ Adaptation: HTML converted to plain text; contact email addresses removed. To use Kora with your dapp, you'll need a Kora node update your client code for interacting with Kora. 1. Kora Nodes Since you have a specific use case, you may want to run your own node. This involves setting up a configuration and running an off-chain server. Here's a guide for quickly setting up a Kora server locally and another guide starting up a server with a docker container. If you do end up running your own node AND wish for the Kora node to sign transactions using Web3 Authentication, you'll need to add Web3 Auth to Solana Keychain (which is used by Kora for signing). 2. Updated Client Code Because Kora will sign and be feepayer on your transactions, you'll need to make a couple of small changes to your client code. First, use the getPayerSigner method to get the Kora node's signing address. Next, set your transaction's feepayer the Kora Signer from the previous step Update your client signing to partial sign Encode your partially signed transaction as base64 and send it to the Kora node for signing Here is a Guide on using Kora and Sample client code for interacting with Kora which covers all the steps above.