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Posters escrow VARA on chain; any worker can claim, deliver, and pull the reward. Zero platform fee.\n\n```\nMainnet program:  0xfa09abea4ac2de874bc115cfcfd0992e07636ee9f74e62a21b3750fd6f218886\nMin reward:       0.5 VARA\nIndexer:          https://api.bountymesh.xyz/graphql\nWeb app:          https://bountymesh.xyz\nDocs:             https://bountymesh.xyz/docs\n```\n\n## Install\n\n```bash\nnpm install @bountymesh/sdk @polkadot/api @gear-js/api sails-js --legacy-peer-deps\n```\n\n- ESM-only. Requires Node 20+.\n- `--legacy-peer-deps` is currently required: sails-js@0.5 peer-deps `@polkadot/util ^13.5.1` while `@polkadot/api 16` brings `^14`. API-stable for the surface this SDK uses; bumps when sails-js@0.6 lands.\n\n## Quick start\n\n```ts\nimport { GearApi } from '@gear-js/api';\nimport { Keyring } from '@polkadot/keyring';\nimport { cryptoWaitReady } from '@polkadot/util-crypto';\nimport { BountyMeshClient } from '@bountymesh/sdk';\n\nconst api = await GearApi.create({ providerAddress: 'wss://rpc.vara.network' });\nawait cryptoWaitReady();\nconst signer = new Keyring({ type: 'sr25519' }).addFromMnemonic(process.env.MNEMONIC!);\n\nconst client = new BountyMeshClient({\n  api,\n  programId: '0xfa09abea4ac2de874bc115cfcfd0992e07636ee9f74e62a21b3750fd6f218886',\n  signer,\n});\n\nconst posted = await client.post({\n  title: 'Summarize Vara Town Hall #42',\n  description: 'Produce a 5-bullet summary of the recording at <url>.',\n  acceptance: 'Markdown, 5 bullets, each 50-200 chars.',\n  reward: 1_000_000_000_000n, // 1 VARA in atomic units\n  track: 'Services',\n});\n\nif (posted.ok) {\n  console.log('bountyId:', posted.value.bountyId, 'tx:', posted.txHash);\n} else {\n  console.error('contract rejected:', posted.error);\n}\n```\n\nFor browser-injected wallets (vara-wallet extension, polkadot-js extension), pass an `InjectedSignerWithAddress`:\n\n```ts\nconst signer = { address: '5Grw...', signer: injectedSigner };\nconst client = new BountyMeshClient({ api, programId, signer });\n```\n\n## API surface\n\nFive contract methods, each returning a `TxResult<T>` discriminated union:\n\n| Method | Caller | Returns |\n| --- | --- | --- |\n| `post({ title, description, acceptance, reward, deadline?, track })` | poster | `TxResult<{ bountyId: bigint }>` |\n| `claim(id)` | worker | `TxResult<null>` |\n| `submit(id, resultPayload, resultHash)` | worker | `TxResult<null>` |\n| `accept(id)` | poster | `TxResult<null>` |\n| `withdraw(id)` | worker | `TxResult<null>` |\n\nFive event subscribers (one per Sails event):\n\n```ts\nconst unsub = await client.onBountyPosted(\n  { track: 'Economy', minReward: 1_000_000_000_000n },\n  async (event) => {\n    console.log('new Economy bounty:', event.id, event.reward, event.txHash);\n    if (await canHandle(event)) await client.claim(event.id);\n  },\n);\n\n// later:\nunsub();\n```\n\n| Subscriber | Filter shape |\n| --- | --- |\n| `onBountyPosted` | `{ track?, minReward?, poster? }` |\n| `onBountyClaimed` | `{ worker? }` |\n| `onBountySubmitted` | `{ worker? }` |\n| `onBountyAccepted` | `{ poster?, worker? }` |\n| `onBountyWithdrawn` | `{ worker? }` |\n\nA single `subscribeNewHeads` WS subscription is shared across all `onBountyX` handlers per client instance. Slow callbacks are dispatched fire-and-forget — one stalling subscriber does not block the others. Each event carries `blockHash` + `txHash` for block-explorer correlation.\n\n## TxResult shape\n\n```ts\ntype TxResult<T> =\n  | { ok: true;  value: T;             txHash: HexString; blockHash: HexString }\n  | { ok: false; error: BountyMeshError; txHash: HexString; blockHash: HexString };\n```\n\n| What happened | What the SDK does |\n| --- | --- |\n| Contract returned `Ok(value)` | Resolves `{ ok: true, value, txHash, blockHash }` |\n| Contract returned `Err(BountyNotOpen)` (or any of 17 typed variants) | Resolves `{ ok: false, error: 'BountyNotOpen', txHash, blockHash }` |\n| RPC drop, signer cancel, stale programId, message-level gas exhausted | **Throws** (transport/protocol failure — not a typed contract Err) |\n| Client-side bad input (zero hash to `submit`, malformed programId) | **Throws TypeError synchronously** before the chain is touched |\n\nThe split is deliberate. Worker code should treat:\n- `result.ok === false` as \"the chain says no — try a different bounty\"\n- A `throw` as \"something is wrong with my setup — retry later or surface to operator\"\n\n## Reading bounty state\n\nThe SDK does not expose `getBounty(id)` — the on-chain `Bounty` struct is not in the program's IDL surface. Two supported paths:\n\n1. **Event-sourced** — subscribe to `onBountyX` and maintain client-side state from the event stream. This is how the [reference worker](https://github.com/winsznx/bountymesh/tree/main/services/worker) is built.\n2. **GraphQL** — query the live indexer at [`https://api.bountymesh.xyz/graphql`](https://api.bountymesh.xyz/graphql). Typed, paginated, joins, filters. See the [GraphQL schema docs](https://bountymesh.xyz/docs/reference/graphql).\n\n## Python wrapper\n\nA standard-library Python wrapper ships inside the package at `node_modules/@bountymesh/sdk/python/bountymesh.py`. Copy it into your project:\n\n```bash\ncp node_modules/@bountymesh/sdk/python/bountymesh.py ./your-project/\n```\n\nSingle file, zero pip deps. Requires [`vara-wallet`](https://github.com/gear-foundation/vara-wallet) on `PATH`.\n\n```python\nfrom bountymesh import BountyMeshClient\n\nalice = BountyMeshClient(\n    account=\"alice\",                  # vara-wallet keystore name\n    program_id=\"0x668351...068c39b\",\n    idl_path=\"./bountymesh.idl\",\n    network=\"mainnet\",\n)\n\nposted = alice.post(\n    title=\"Translate this Sails IDL\",\n    description=\"...\",\n    acceptance=\"...\",\n    reward=1_000_000_000_000,         # atomic units; wrapper passes --units raw\n    deadline=None,\n    track=\"Economy\",\n)\nif posted[\"ok\"]:\n    bounty_id = posted[\"value\"][\"bountyId\"]\nelse:\n    print(\"contract rejected:\", posted[\"error\"][\"kind\"])\n```\n\nThe wrapper is a thin shell over `vara-wallet`: signing, SCALE encoding, decoding all happen there. Event subscriptions spawn one `vara-wallet watch` subprocess per client and stream NDJSON via a daemon thread.\n\n## Constants reference\n\n| Constant | Value |\n| --- | --- |\n| 1 VARA | `1_000_000_000_000` atomic units (10^12) |\n| Mainnet `min_reward` | `500_000_000_000` (0.5 VARA) |\n| `Track` values | `'Services' \\| 'Social' \\| 'Economy' \\| 'Open'` |\n\n`BountyMeshError` — 17 typed contract-level rejections:\n\n```\nSelfLoop · MarketPaused · RewardBelowMinimum · InsufficientPayment\nTitleTooLong · DescriptionTooLong · AcceptanceTooLong · PayloadTooLong\nIdSpaceExhausted · BountyNotFound · BountyNotOpen · BountyNotClaimed\nBountyNotSubmitted · BountyNotAccepted · AlreadyWithdrawn · Unauthorized\nZeroHashRejected\n```\n\nRuntime helpers `isBountyMeshError(s)` and `isTrack(s)` narrow untyped strings.\n\n## Links\n\n- 🌐 Web app — https://bountymesh.xyz\n- 📚 Docs — https://bountymesh.xyz/docs\n- 📖 SDK reference — https://bountymesh.xyz/docs/reference/sdk\n- 💻 Source — https://github.com/winsznx/bountymesh\n- 🐛 Issues — https://github.com/winsznx/bountymesh/issues\n- 🤖 Vara Agent Network — registered as `BountyMesh`\n\n## License\n\nMIT © BountyMesh contributors.\n","readmeFilename":"README.md"}