# almm:active-bin — Ammora SDK 0.3.8

Read a bin pool's active bin, the one trading happens in. No key required. npm run almm:active-bin -- <poolAddress> The reference repository splits this across `active-id` and `get-active-bin`; the id and the bin's contents are one read here, so this covers both.

[Read in Docs](https://docs.ammora.org/examples?command=almm%3Aactive-bin) · [Detailed guide](https://docs.ammora.org/guides/src-almm-readme) · [Local setup](https://docs.ammora.org/guides/example-setup)

## Context and execution

GIWA Sepolia 91342. Public SDK 0.3.8, Math 0.3.0. Source revision: `a9b3fd798fa51495e8defec99a25de59e4d70672`.
Install the SDK in your app, or prepare the example project using the local setup guide for its npm commands. Review the entry source and guide for required arguments, roles and deployment selection. `AMMORA_SEND=0` does not turn send-only commands into previews. Never put CLI keys in a browser or resend an uncertain transaction.

Command: `npm run almm:active-bin -- <arguments from the source below>` (`tsx src/almm/active-bin.ts`). Omit `--` and arguments when the source accepts none.

## Entry file: `src/almm/active-bin.ts`

```typescript
/**
 * Read a bin pool's active bin, the one trading happens in. No key required.
 *
 *   npm run almm:active-bin -- <poolAddress>
 *
 * The reference repository splits this across `active-id` and `get-active-bin`; the id and
 * the bin's contents are one read here, so this covers both.
 */
import { almmBinPoolAbi, ALMMClient } from "@ammora-protocol/sdk";
import { clientOptions, address, deployment, reader } from "../shared/env.js";
import { amount, asPool, main, requireContract, tokenInfo } from "../shared/run.js";

main(async () => {
  const pool = address("ALMM_POOL", process.argv[2]);
  const client = await reader();
  const contracts = deployment().contracts.liquidityMarketMaker;

  await requireContract(client, "pool", pool);
  const sdk = new ALMMClient(client, pool, contracts.positionManager, contracts.binLens, clientOptions());
  const state = await asPool(pool, "a bin pool", () => sdk.getPoolState());
  const [base, quote] = await Promise.all([
    tokenInfo(client, state.baseToken),
    tokenInfo(client, state.quoteToken),
  ]);

  console.log(`pool       ${pool}`);
  console.log(`pair       ${base.symbol} / ${quote.symbol}`);
  console.log(`bin step   ${state.binStepBps} bps`);
  console.log(`active id  ${state.activeId}`);
  console.log(`fee now    ${state.currentFeeBps} bps`);
  console.log(`status     ${state.status}`);

  const bin = await client.readContract({
    abi: almmBinPoolAbi,
    address: pool,
    functionName: "bins",
    args: [state.activeId],
  }) as readonly [bigint, bigint, bigint, bigint, ...unknown[]];
  // Bin is (reserveBase, reserveQuote, liquidity, totalShares, ...), so skip liquidity.
  const [reserveBase, reserveQuote, , totalShares] = bin;

  console.log("");
  console.log("active bin reserves");
  console.log(`  base   ${amount(reserveBase, base.decimals, base.symbol)}`);
  console.log(`  quote  ${amount(reserveQuote, quote.decimals, quote.symbol)}`);
  console.log(`  shares ${totalShares}`);

  if (reserveBase === 0n && reserveQuote === 0n) {
    // A swap starting here would traverse outward before it filled anything.
    console.log("\nthe active bin is empty, so a swap would cross into neighbouring bins");
  }
});
```

## Supporting files

Keep relative paths intact. Local imports are listed recursively; JSON templates are choices to review, not approved inputs. Runtime-selected files and wallet/environment setup still follow the detailed guide.

- [src/shared/env.ts](https://docs.ammora.org/examples/source/src/shared/env.ts.txt)
- [src/shared/input.ts](https://docs.ammora.org/examples/source/src/shared/input.ts.txt)
- [src/shared/retry.ts](https://docs.ammora.org/examples/source/src/shared/retry.ts.txt)
- [src/shared/rpc.ts](https://docs.ammora.org/examples/source/src/shared/rpc.ts.txt)
- [src/shared/run.ts](https://docs.ammora.org/examples/source/src/shared/run.ts.txt)
- [src/almm/rebalance.example.json](https://docs.ammora.org/examples/source/src/almm/rebalance.example.json.txt)
- [package.json](https://docs.ammora.org/examples/source/package.json.txt)
- [package-lock.json](https://docs.ammora.org/examples/source/package-lock.json.txt)
- [tsconfig.json](https://docs.ammora.org/examples/source/tsconfig.json.txt)
- [.env.giwa.example](https://docs.ammora.org/examples/source/file.env.giwa.example.txt)
- [.nvmrc](https://docs.ammora.org/examples/source/file.nvmrc.txt)

## AI implementation checklist

Use the actual SDK exports and parameter types in the linked files. Start with reads and unsigned plans where supported. Use a connected wallet for browser signing. Preserve raw integer units, exact approvals, caller authority, deadlines and receipt reconciliation. Report local checks separately from live-chain verification.