Function loadSavedWallet

src/auth.ts:50–89

* Try to load a previously auto-generated wallet key from disk.

()

 * Try to load a previously auto-generated wallet key from disk.
 */
async function loadSavedWallet(): Promise<string | undefined> {
  try {
    const key = (await readTextFile(WALLET_FILE)).trim();
    if (key.startsWith("0x") && key.length === 66) {
      console.log(`[ClawRouter] ✓ Loaded existing wallet from ${WALLET_FILE}`);
      return key;
    }
    // File exists but content is wrong — do NOT silently fall through to generate a new wallet.
    // This would silently replace a funded wallet with an empty one.
    console.error(`[ClawRouter] ✗ CRITICAL: Wallet file exists but has invalid format!`);
    console.error(`[ClawRouter]   File: ${WALLET_FILE}`);
    console.error(`[ClawRouter]   Expected: 0x followed by 64 hex characters (66 chars total)`);
    console.error(
      `[ClawRouter]   To fix: restore your backup key or set BLOCKRUN_WALLET_KEY env var`,
    );
    throw new Error(
      `Wallet file at ${WALLET_FILE} is corrupted or has wrong format. ` +
        `Refusing to auto-generate new wallet to protect existing funds. ` +
        `Restore your backup key or set BLOCKRUN_WALLET_KEY environment variable.`,
    );
  } catch (err) {
    // Re-throw corruption errors (not ENOENT)
    if ((err as NodeJS.ErrnoException).code !== "ENOENT") {
      // If it's our own thrown error, re-throw as-is
      if (err instanceof Error && err.message.includes("Refusing to auto-generate")) {
        throw err;
      }
      console.error(
        `[ClawRouter] ✗ Failed to read wallet file: ${err instanceof Error ? err.message : String(err)}`,
      );
      throw new Error(
        `Cannot read wallet file at ${WALLET_FILE}: ${err instanceof Error ? err.message : String(err)}. ` +
          `Refusing to auto-generate new wallet to protect existing funds. ` +
          `Fix file permissions or set BLOCKRUN_WALLET_KEY environment variable.`,
        { cause: err },
      );
    }
  }
  return undefined;
}

/**
 * Load mnemonic from disk if it exists.