> For the complete documentation index, see [llms.txt](https://black-sheep-finance.gitbook.io/black-sheep-finance-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://black-sheep-finance.gitbook.io/black-sheep-finance-docs/core-concepts/transactions.md).

# Transactions

Every on-chain action — send, receive, airdrop — produces a `transaction` row.

## Fields

```ts
type Transaction = {
  id: string;             // internal UUID
  signature: string|null; // Solana signature once confirmed
  kind: "usdc" | "sol";
  direction: "send" | "receive";
  amount: number;         // whole units
  counterparty: string|null;
  status: "pending" | "confirmed" | "failed";
  memo: string|null;
  created_at: string;     // ISO 8601
  wallet_id: string;
};
```

## Statuses

| Status      | Meaning                                                          |
| ----------- | ---------------------------------------------------------------- |
| `pending`   | Broadcast, awaiting confirmation (rare; we wait for `confirmed`) |
| `confirmed` | Finalized on Solana (commitment: `confirmed`)                    |
| `failed`    | RPC accepted but the cluster rejected — full reason in audit log |

## Receive detection

Inbound USDC is detected by a background indexer that polls each wallet's signatures. Expect a 5–15 second lag between an on-chain transfer to your agent and a `receive` row appearing.

## Memo handling

Memos use the Solana **Memo Program** and are visible on-chain. Keep them under 200 chars. They're great for invoice IDs and vendor references — don't put PII in them.

## Querying

```ts
const all = await bs.transactions.list();          // last 100
```

Filtering and pagination are on the roadmap. For heavy reporting, mirror via webhook (`tx.sent`) into your own warehouse.

## Reconciliation

For every `confirmed` tx the on-chain signature is the source of truth. The ledger row is informational and can be re-derived from Solana history if needed.


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