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Running three separate migrations in sequence leaves the codebase in a broken intermediate state on every pass. This codemod treats the full stack as a single atomic migration. ## Supported Migrations | Library | From | To | Status | |---|---|---|---| | wagmi | v1 | v2 | Deterministic | | ethers | v5 | v6 | Deterministic | | @rainbow-me/rainbowkit | v1 | v2 | Deterministic + AI cleanup | The codemod reads your `package.json` and runs only the migrations that apply to your project. If you only have wagmi and ethers (no RainbowKit), only those two transforms run. ## Quickstart ```bash npx codemod@latest @TobieTom/web3-stack-modernizer ``` Run this from the root of your project. The codemod will detect your stack, apply all safe transforms, and flag the remaining edge cases with `TODO` comments for the AI skill to handle. ## What Gets Automated ### wagmi v1 → v2 - `useContractRead` → `useReadContract` - `useContractWrite` → `useWriteContract` - `usePrepareContractWrite` → `useSimulateContract` - `useWaitForTransaction` → `useWaitForTransactionReceipt` - `useContractEvent` → `useWatchContractEvent` - `useContractInfiniteReads` → `useInfiniteReadContracts` - `WagmiConfig` → `WagmiProvider` (imports + JSX open/close tags) - `createClient` → `createConfig` - Import path `wagmi/chains` → `viem/chains` - Import path `wagmi/connectors/*` → `wagmi/connectors` ### ethers v5 → v6 - `ethers.providers.Web3Provider` → `ethers.BrowserProvider` - `ethers.providers.JsonRpcProvider` → `ethers.JsonRpcProvider` - `ethers.providers.StaticJsonRpcProvider` → `ethers.JsonRpcProvider` - `ethers.utils.parseEther/formatEther/parseUnits/formatUnits` → top-level equivalents - `ethers.utils.keccak256` → `ethers.keccak256` - `ethers.utils.arrayify` → `ethers.getBytes` - `ethers.utils.hexZeroPad` → `ethers.zeroPadValue` - `ethers.utils.solidityKeccak256` → `ethers.solidityPackedKeccak256` - `ethers.utils.solidityPack` → `ethers.solidityPacked` - `ethers.BigNumber.from(x)` → `BigInt(x)` - `.callStatic.method(args)` → `.method.staticCall(args)` ### RainbowKit v1 → v2 - `` → `` (chains prop removed) - `getDefaultWallets({ chains, ...rest })` → `getDefaultWallets({ ...rest })` (chains removed) - `configureChains(...)` flagged with `TODO` comment for manual removal ## What Needs AI Cleanup After the deterministic pass, the installed AI skill handles: 1. **`provider.getSigner()` is now async** — adds `await` and makes containing functions `async` 2. **Nested `.callStatic` patterns** — `.connect(signer).callStatic.method()` and stored-callStatic forms 3. **BigNumber arithmetic chains** — `.add().mul().div()` chains → native `bigint` operators 4. **`configureChains` removal** — restructures chains, transports, and connectors into `createConfig` 5. **`QueryClientProvider` wrapping** — wraps the provider tree with TanStack Query (required by wagmi v2) 6. **`contract.address` → `contract.target`** — applied only when the variable is a confirmed `Contract` instance 7. **TypeScript type annotations** — `ethers.providers.Provider` → `ethers.Provider`, `ethers.ContractInterface` → `ethers.InterfaceAbi`, `ethers.BigNumber` → `bigint`, and others ## Detection The codemod reads your project's `package.json` at runtime and checks the installed versions: | Variable | Condition | |---|---| | `MIGRATE_WAGMI=true` | wagmi version starts with `1.` or `^1` | | `MIGRATE_ETHERS=true` | ethers version starts with `5.` or `^5` | | `MIGRATE_RAINBOWKIT=true` | @rainbow-me/rainbowkit version starts with `1.` or `^1` | If `package.json` is not found, all three migrations run (safe default). ## DoraHacks This codemod was submitted to the Boring AI hackathon. View the submission at [dorahacks.io](https://dorahacks.io). ## License MIT — see [LICENSE](LICENSE) for details. 18:[["$","script",null,{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"$46"}}],["$","$L47",null,{"state":{"mutations":[],"queries":[{"state":{"data":{"json":{"id":"701a1bc0-1a84-4a0f-be33-f669966feded","name":"web3-stack-modernizer","displayName":"@TobieTom/web3-stack-modernizer","description":"Modernize your entire Web3 frontend stack in one command. 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useContractRead, useContractWrite, usePrepareContractWrite, useWaitForTransaction, WagmiConfig, createClient } from 'wagmi'\nimport { mainnet, polygon } from 'wagmi/chains'\nimport { injectedConnector } from 'wagmi/connectors/injected'\n\nconst config = createClient({\n autoConnect: true,\n connectors: [injectedConnector],\n})\n\nfunction App() {\n return (\n \n \n \n )\n}\n\nfunction DeFiApp() {\n const { data } = useContractRead({\n address: '0xToken',\n abi: TOKEN_ABI,\n functionName: 'balanceOf',\n args: [userAddress],\n })\n\n const { write } = useContractWrite({\n address: '0xToken',\n abi: TOKEN_ABI,\n functionName: 'transfer',\n })\n\n const { config: prepConfig } = usePrepareContractWrite({\n address: '0xToken',\n abi: TOKEN_ABI,\n functionName: 'approve',\n })\n\n const { isLoading } = useWaitForTransaction({ hash: txHash })\n\n return

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