@reown/appkit-siwx/dist/esm/src/verifiers/EIP155Verifier.js

The chain agnostic tool to enable authentication for AppKit applications.

import { createPublicClient, http } from 'viem';
import { ConstantsUtil } from '@reown/appkit-common';
import { ChainController } from '@reown/appkit-controllers';
import { SIWXVerifier } from '../core/SIWXVerifier.js';
/**
 * Default verifier for EIP155 sessions.
 */
export class EIP155Verifier extends SIWXVerifier {
    constructor() {
        super(...arguments);
        this.chainNamespace = ConstantsUtil.CHAIN.EVM;
    }
    async verify(session) {
        const caipNetwork = ChainController.state.chains
            .get('eip155')
            ?.caipNetworks?.find(cn => cn.caipNetworkId === session.data.chainId);
        if (!caipNetwork) {
            throw new Error('EIP155.verify: CaipNetwork not found');
        }
        try {
            const client = createPublicClient({
                chain: caipNetwork,
                transport: http(caipNetwork?.['rpcUrls'].default.http[0])
            });
            return await client.verifyMessage({
                message: session.message.toString(),
                signature: session.signature,
                address: session.data.accountAddress
            });
        }
        catch (error) {
            return false;
        }
    }
}
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