@codeswithroh/reckon-sdk

A drop-in SDK for Reckon — a transaction seatbelt for Monad. Pre-flight and safe-send transactions, guard an EIP-1193 wallet provider so doomed or risky transactions never reach the wallet, or route a batch through the on-chain GuardedExecutor.

Install

npm install @codeswithroh/reckon-sdk viem

Pre-flight and safe-send

import { createReckonClient } from "@codeswithroh/reckon-sdk";

const reckon = createReckonClient({ account: myAccount });

const verdict = await reckon.preflight(tx);
if (verdict.willRevert) throw new Error(verdict.revertReason);

const { hash } = await reckon.safeSend(tx); // pre-flights, then broadcasts only if safe

Guard a wallet provider

One line protects a whole dApp's users: every eth_sendTransaction is pre-flighted first, and a doomed or critically-risky call (an unlimited approval, an NFT operator grant) is blocked before the wallet even prompts — the user never signs it, never burns MON on a failure.

import { createGuardedProvider } from "@codeswithroh/reckon-sdk";

const provider = createGuardedProvider(window.ethereum);
// use `provider` anywhere you'd use window.ethereum

Route a batch through the on-chain guard

await reckon.guardedExecute([
  { target: "0x...", data: "0x...", gasCap: 100_000n },
]);

Why this exists

On Monad you pay for the gas limit you declare, not the gas you use, even when your transaction reverts, verified empirically to the wei (see the project README). Reckon pre-flights every transaction so you stop paying for failures and oversized limits, and flags approval/permission-escalation risk that a naive revert check would miss.

License

MIT