[bug] Custom Network Not Working For Solana

[ra-sun-god]

Link to minimal reproducible example

Calling a Transaction using a custom network for solana localnet fails

Steps to Reproduce

Add a custom network for Solana, I created one for localnet:

import { defineChain } from '@reown/appkit/networks';

// Define the custom network
export const solanaLocalnet = defineChain({
    id: "C7PPtqrayTxjudYFNtv2hbWcU6SzEgvGjoZer4eAxv4V",
    name: "Solana Localnet",
    network: "solana-localnet",
    nativeCurrency: {
        name: "Solana",
        symbol: "SOL",
        decimals: 9
    },
    rpcUrls: {
        default: {
            http: [
                "http://127.0.0.1:8899"
            ]
        },
        chainDefault: {
            http: [
                "http://127.0.0.1:8899"
            ]
        }
    },
    blockExplorers: {
        default: {
          name: "Solscan",
          url: "https://solscan.io?cluster=custom&customUrl=http://127.0.0.1:8899"
        }
    },
    testnet: true,
    chainNamespace: "solana",
    caipNetworkId: "solana:C7PPtqrayTxjudYFNtv2hbWcU6SzEgvGjoZer4eAxv4V",
})

Then using backpack, switch to localnet and try performing a transaction

Summary

The I noticed the reown hardcoded the Solana chains, but Solana isnt the only SVM chain now, we now have SOON, Eclipse, Solayer and others, hardcoding Solana Chains will cause problems for custom networks.

This is what I found in reown solana lib during code inspection:

var solanaChains = {
  "solana:mainnet": solana,
  "solana:testnet": solanaTestnet,
  "solana:devnet": solanaDevnet
};

  getActiveChainName() {
    const entry = Object.entries(solanaChains).find(([, chain]) => {
      var _a;
      return chain.id === ((_a = this.getActiveChain()) == null ? void 0 : _a.id);
    });
    if (!entry) {
      throw new Error("Invalid chain id");
    }
    return entry[0];
  }

This is using hard coded solanaChains object to validate the chains, which directly ignore custom chains.

List of related npm package versions

"@reown/appkit": "^1.8.14",
"@reown/appkit-adapter-solana": "^1.8.14",
"@reown/appkit-siwx": "^1.8.14",

Node.js Version

v24.8.0

Package Manager

npm 11.6.2

[linear]

APKT-4292

[linear]

from khizr:

We will look into this as soon as possible.