permissionless/_esm/accounts/kernel/utils/signMessage.js

A utility library for working with ERC-4337

import { encodeAbiParameters, hashMessage } from "viem";
import { signMessage as _signMessage } from "viem/actions";
import { getOxExports } from "../../../utils/ox.js";
import { isWebAuthnAccount } from "./isWebAuthnAccount.js";
import { wrapMessageHash } from "./wrapMessageHash.js";
export async function signMessage({ message, owner, accountAddress, kernelVersion: accountVersion, chainId, eip7702 }) {
    if (isWebAuthnAccount(owner)) {
        let messageContent;
        if (typeof message === "string") {
            // message is a string
            messageContent = wrapMessageHash(hashMessage(message), {
                kernelVersion: accountVersion,
                accountAddress,
                chainId
                // chainId: client.chain
                //     ? client.chain.id
                //     : await client.extend(publicActions).getChainId()
            });
        }
        else if ("raw" in message && typeof message.raw === "string") {
            // message.raw is a Hex string
            messageContent = message.raw;
        }
        else if ("raw" in message && message.raw instanceof Uint8Array) {
            // message.raw is a ByteArray
            messageContent = message.raw.toString();
        }
        else {
            throw new Error("Unsupported message format");
        }
        const { signature: signatureData, webauthn } = await owner.sign({
            hash: messageContent
        });
        const { Signature } = await getOxExports();
        const signature = Signature.fromHex(signatureData);
        // encode signature
        const encodedSignature = encodeAbiParameters([
            { name: "authenticatorData", type: "bytes" },
            { name: "clientDataJSON", type: "string" },
            { name: "responseTypeLocation", type: "uint256" },
            { name: "r", type: "uint256" },
            { name: "s", type: "uint256" },
            { name: "usePrecompiled", type: "bool" }
        ], [
            webauthn.authenticatorData,
            webauthn.clientDataJSON,
            BigInt(webauthn.typeIndex),
            BigInt(signature.r),
            BigInt(signature.s),
            false // TODO: check if it is a RIP 7212 supported network
        ]);
        return encodedSignature;
    }
    if (eip7702) {
        return owner.signTypedData({
            message: { hash: hashMessage(message) },
            primaryType: "Kernel",
            types: {
                Kernel: [{ name: "hash", type: "bytes32" }]
            },
            domain: {
                name: "Kernel",
                version: accountVersion,
                chainId: chainId,
                verifyingContract: accountAddress
            }
        });
    }
    if (accountVersion === "0.2.1" || accountVersion === "0.2.2") {
        return owner.signMessage({
            message
        });
    }
    const wrappedMessageHash = wrapMessageHash(hashMessage(message), {
        kernelVersion: accountVersion,
        accountAddress,
        chainId
        // chainId: client.chain
        //     ? client.chain.id
        //     : await client.extend(publicActions).getChainId()
    });
    return owner.signMessage({
        message: { raw: wrappedMessageHash }
    });
}
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