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liquidity.","maintainers":[{"name":"indigo256","email":"indigo.eth@protonmail.com"},{"name":"a1740942002","email":"a1740942002@me.com"}],"readme":"# @baseline-markets/sdk\n\nA typed TypeScript SDK for interacting with [Baseline Protocol](https://baseline.markets) contracts via [viem](https://viem.sh).\n\nBaseline is an onchain AMM for tokens with built-in liquidity — `@baseline-markets/sdk` exposes a single `BaselineSDK` class covering token launches, swaps, borrowing, leverage, staking, and rewards.\n\n## Install\n\n```bash\nnpm install @baseline-markets/sdk viem\n# or: bun add @baseline-markets/sdk viem\n```\n\n`viem` is a peer dependency — bring your own.\n\n## Quickstart\n\n```ts\nimport { BaselineSDK } from '@baseline-markets/sdk';\nimport { createPublicClient, createWalletClient, http, custom } from 'viem';\nimport { base } from 'viem/chains';\n\nconst publicClient = createPublicClient({\n chain: base,\n transport: http(),\n});\n\n// Wallet client is optional — only needed for write actions\nconst walletClient = createWalletClient({\n chain: base,\n transport: custom(window.ethereum),\n});\n\nconst sdk = new BaselineSDK(publicClient, walletClient);\n```\n\nEach SDK instance is **bound to a single chain** — the chain comes from `publicClient.chain`. To talk to a different chain, build a new `publicClient` (and `walletClient` if writing) for that chain and instantiate a new `BaselineSDK`. The SDK has no `chainId` parameter on its methods by design; chain selection lives in the clients you pass to the constructor. See [Switching chains](#switching-chains) below for the React + wagmi pattern.\n\n### Read-only\n\n```ts\nconst bToken = '0x...' as const;\n\nconst price = await sdk.activePrice(bToken);\nconst reserve = await sdk.getReserve(bToken);\nconst quote = await sdk.quoteBuyExactOut(bToken, 100n);\n```\n\n### Swaps\n\n```ts\n// Buy exactly 100 bTokens, capped at `quote.amountIn` reserve in\nconst hash = await sdk.buyTokensExactOut(bToken, 100n, quote.amountIn, {\n confirmations: 1,\n});\n\n// Sell 100 bTokens, accept at least `minOut` reserve out\nconst hash2 = await sdk.sellTokensExactIn(bToken, 100n, minOut);\n```\n\n### Borrow / leverage / stake\n\n```ts\nawait sdk.deposit(bToken, collateral);\nawait sdk.borrow(bToken, debtAmount, recipient);\n\nconst leverageQuote = await sdk.quoteLeverage(bToken, collateralIn, leverageFactor);\nawait sdk.leverage(\n bToken,\n leverageQuote.targetCollateral,\n collateralIn,\n leverageQuote.maxSwapReservesIn,\n);\n\nawait sdk.repay(bToken, reservesIn, recipient);\nawait sdk.claim(bToken);\n```\n\nSee `src/baseline-sdk.ts` for the full method list.\n\n## Error handling\n\nAll write methods throw `SDKError`, a single error type with a `.kind` discriminator so you don't have to sniff messages:\n\n```ts\nimport { SDKError } from '@baseline-markets/sdk';\n\ntry {\n await sdk.buyTokensExactOut(bToken, 100n, maxIn);\n} catch (err) {\n if (err instanceof SDKError) {\n switch (err.kind) {\n case 'user_rejected': // user cancelled in their wallet\n case 'insufficient_funds': // not enough native balance for gas\n case 'reverted': // contract reverted (decoded reason in .message)\n case 'network': // RPC/socket/timeout — retry-worthy\n case 'wallet': // SDK misuse: no wallet, no account\n case 'unknown': // anything else\n }\n }\n}\n```\n\nThe original viem error is preserved on `err.cause` if you need it.\n\n## React + wagmi\n\nwagmi's `usePublicClient` / `useWalletClient` return viem clients, so they plug straight into `BaselineSDK`. Wrap construction in a hook and memoize — re-creating the SDK on every render is fine but wasteful.\n\n```tsx\nimport { useMemo } from 'react';\nimport { useChainId, usePublicClient, useWalletClient } from 'wagmi';\nimport { BaselineSDK } from '@baseline-markets/sdk';\n\nexport function useBaselineSDK(chainId?: number) {\n const walletChainId = useChainId();\n const targetChainId = chainId ?? walletChainId;\n\n const publicClient = usePublicClient({ chainId: targetChainId });\n const { data: walletClient } = useWalletClient({ chainId: targetChainId });\n\n return useMemo(() => {\n if (!publicClient) return null;\n return new BaselineSDK(publicClient, walletClient ?? undefined);\n }, [publicClient, walletClient]);\n}\n```\n\n`useWalletClient()` returns `undefined` until the user connects — the SDK still works for reads in that state, and `sdk.hasWallet` tells you whether write actions are available.\n\n### Switching chains\n\nThe SDK is **single-chain**: the chain is baked into `publicClient`, so a `BaselineSDK` instance can only talk to one network. When the user switches network, you need new clients and a new SDK.\n\nWith the hook above this is automatic — passing `chainId` to wagmi's `usePublicClient`/`useWalletClient` returns different client references per chain, the `useMemo` deps change, and a fresh `BaselineSDK` is constructed. You don't have to do anything special; just trust that:\n\n1. **Chain change → new clients → new SDK.** Construction is cheap (the SDK just holds client references and resolves a proxy address from the chain id), so don't try to skip the rebuild.\n2. **Don't mix chains in one SDK.** Never pass a `publicClient` for one chain and a `walletClient` for another — reads and writes will target different networks.\n3. **Read across chains?** Call the hook with an explicit `chainId` per component (e.g. `useBaselineSDK(mainnet.id)` and `useBaselineSDK(base.id)`) — you'll get two independent SDK instances, one per chain.\n\n### Reads with `useQuery`\n\n```tsx\nimport { useQuery } from '@tanstack/react-query';\n\nfunction Price({ bToken }: { bToken: `0x${string}` }) {\n const sdk = useBaselineSDK();\n\n const { data: price } = useQuery({\n queryKey: ['baseline', 'activePrice', sdk?.chainId, bToken],\n queryFn: () => sdk!.activePrice(bToken),\n enabled: !!sdk,\n });\n\n return
{price?.toString()}
;\n}\n```\n\nInclude `sdk.chainId` in the query key so cached data is scoped per network.\n\n### Writes with `useMutation`\n\n```tsx\nimport { useMutation } from '@tanstack/react-query';\nimport { SDKError } from '@baseline-markets/sdk';\n\nfunction BuyButton({ bToken, amount, maxIn }: {\n bToken: `0x${string}`;\n amount: bigint;\n maxIn: bigint;\n}) {\n const sdk = useBaselineSDK();\n\n const buy = useMutation({\n mutationFn: () =>\n sdk!.buyTokensExactOut(bToken, amount, maxIn, { confirmations: 1 }),\n onError: (err) => {\n if (err instanceof SDKError && err.kind === 'user_rejected') return;\n // surface other kinds: insufficient_funds, reverted, network, ...\n },\n });\n\n return (\n buy.mutate()}\n >\n {buy.isPending ? 'Confirming…' : 'Buy'}\n \n );\n}\n```\n\nThe `confirmations` option resolves the promise only after the receipt reaches the requested confirmation count, so `buy.isPending` covers both the wallet prompt and the on-chain confirmation.\n\n## Configuration\n\n`BaselineSDK` takes an optional third argument:\n\n```ts\nnew BaselineSDK(publicClient, walletClient, {\n defaultUseNative: true, // use native ETH paths by default where supported\n});\n```\n\nPer-call options live on `TxOpts`:\n\n```ts\nawait sdk.buyTokensExactOut(bToken, 100n, maxIn, {\n account: '0x...', // override which address sends the tx\n confirmations: 2, // wait for N confirmations before returning\n onSimulateError: (e) => {}, // hook for pre-simulation failures\n});\n```\n\n## Supported networks\n\n- Ethereum mainnet (`mainnet`, chain id `1`)\n- Base (`base`, chain id `8453`)\n\nThe SDK reads the chain from your `publicClient` and throws if it isn't one of the supported chains — no separate chain config needed.\n\n```ts\nimport { supportedChainIds } from '@baseline-markets/sdk';\n\nif (!supportedChainIds.includes(chainId)) {\n // unsupported network — prompt user to switch\n}\n```\n\n## Development\n\n```bash\nbun install\nbun run build # bundle ESM + CJS + .d.ts via tsup\nbun test\n```\n\n## License\n\nMIT\n","readmeFilename":"README.md"}