# Transaction Methods

> Submit, simulate, and query Solana transactions - including signatures, confirmations, and compute unit estimation.

Canonical: https://nolimitnodes.com/docs/api-reference/solana-rpc/transactions

## getTransaction
**POST** - JSON-RPC

Fetches detailed information about a specific transaction using its signature.

### `params[0]`, string, required

Transaction signature as a base-58 encoded string.

### `params[1]`, object

Configuration object:
  - `encoding` (string) - `json`, `jsonParsed`, `base58`, `base64`
  - `commitment` (string) - `finalized` or `confirmed`
  - `maxSupportedTransactionVersion` (integer)

```bash curl
curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"jsonrpc":"2.0","id":1,"method":"getTransaction","params":["2nBhEBYYvfaAe16UMNqRHre4YNSskvuYgx3M6E4JP1oeYYd8Tm5ATGQ7ufRYM5jnFdoP8bHKevSX1Tc3FRxPpM",{"encoding":"jsonParsed","maxSupportedTransactionVersion":0}]}'
```
```json Request
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getTransaction",
  "params": [
    "2nBhEBYYvfaAe16UMNqRHre4YNSskvuYgx3M6E4JP1oeYYd8Tm5ATGQ7ufRYM5jnFdoP8bHKevSX1Tc3FRxPpM",
    { "encoding": "jsonParsed", "maxSupportedTransactionVersion": 0 }
  ]
}
```

```json Response
{
  "jsonrpc": "2.0",
  "result": {
    "slot": 430,
    "transaction": {
      "message": {
        "accountKeys": [],
        "instructions": [],
        "recentBlockhash": "mfcyqEXB3DnHXki6KjjmZck6YjmZLvpAByy2fj4nh6B"
      },
      "signatures": []
    },
    "meta": {
      "err": null,
      "fee": 5000,
      "preBalances": [],
      "postBalances": []
    },
    "blockTime": 1574721591
  },
  "id": 1
}
```

***

## getTransactionCount
**POST** - JSON-RPC

Returns the current transaction count from the ledger.

### `params[0]`, object

Configuration object with optional `commitment` and `minContextSlot`.

```bash curl
curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"jsonrpc":"2.0","id":1,"method":"getTransactionCount"}'
```
```json Request
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getTransactionCount"
}
```

```json Response
{
  "jsonrpc": "2.0",
  "result": 268,
  "id": 1
}
```

***

## getSignatureStatuses
**POST** - JSON-RPC

Returns the statuses of a list of transaction signatures (max 256).

### `params[0]`, array, required

Array of transaction signatures as base-58 encoded strings (max 256).

### `params[1]`, object

Configuration object:
  - `searchTransactionHistory` (boolean) - search beyond recent slots

```bash curl
curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"jsonrpc":"2.0","id":1,"method":"getSignatureStatuses","params":[["5VERv8NMvzbJMEkV8xnrLkEaWRtSz9CosKDYjCJjBRnbJLgp8uirBgmQpjKhoR4tjF3ZpRzrFmBV6UjKdiSZkQUW"],{"searchTransactionHistory":true}]}'
```
```json Request
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getSignatureStatuses",
  "params": [
    ["5VERv8NMvzbJMEkV8xnrLkEaWRtSz9CosKDYjCJjBRnbJLgp8uirBgmQpjKhoR4tjF3ZpRzrFmBV6UjKdiSZkQUW"],
    { "searchTransactionHistory": true }
  ]
}
```

```json Response
{
  "jsonrpc": "2.0",
  "result": {
    "context": { "slot": 82 },
    "value": [
      {
        "slot": 72,
        "confirmations": 10,
        "err": null,
        "confirmationStatus": "finalized"
      }
    ]
  },
  "id": 1
}
```

***

## getSignaturesForAddress
**POST** - JSON-RPC

Returns transaction signatures for confirmed transactions that include the given account address.

### `params[0]`, string, required

Account address as a base-58 encoded string.

### `params[1]`, object

Configuration object:
  - `commitment` (string)
  - `limit` (integer) - max results (1-1000, default 1000)
  - `before` (string) - start searching before this signature
  - `until` (string) - search until this signature
  - `minContextSlot` (integer) - minimum slot for evaluation

```bash curl
curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"jsonrpc":"2.0","id":1,"method":"getSignaturesForAddress","params":["Vote111111111111111111111111111111111111111",{"limit":1}]}'
```
```json Request
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "getSignaturesForAddress",
  "params": [
    "Vote111111111111111111111111111111111111111",
    { "limit": 1 }
  ]
}
```

```json Response
{
  "jsonrpc": "2.0",
  "result": [
    {
      "blockTime": 1574721591,
      "confirmationStatus": "finalized",
      "err": null,
      "memo": null,
      "signature": "5VERv8NMvzbJMEkV8xnrLkEaWRtSz9CosKDYjCJjBRnbJLgp8uirBgmQpjKhoR4tjF3ZpRzrFmBV6UjKdiSZkQUW",
      "slot": 72
    }
  ],
  "id": 1
}
```

***

## sendTransaction
**POST** - JSON-RPC

Submits a signed transaction to the cluster for processing.

### `params[0]`, string, required

Fully-signed transaction as an encoded string.

### `params[1]`, object

Configuration object:
  - `encoding` (string) - `base58` or `base64` (default: `base58`)
  - `skipPreflight` (boolean) - skip preflight checks (default: `false`)
  - `preflightCommitment` (string) - commitment for preflight (default: `finalized`)
  - `maxRetries` (integer) - max node retry attempts
  - `minContextSlot` (integer) - min slot for preflight evaluation

```bash curl
curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"jsonrpc":"2.0","id":1,"method":"sendTransaction","params":["4hXTCkRzt9WyecNzV1XPgCDfGAZzQKNxLXgynz5QDuWWPSAZBZSHptvWRL3BjCvzUXRdKvHL2b7yGrRQcWyaqsaBCncVG7BFggS8w9snUts67BSh3EqKpXLUm5UMHfD7ZBe9GhARjbNQMLJ1QD3Spr6oMTBU6EhdB4RD8CP2xUxr2u3d6fos36PD98XS6oX8TQjLpsMwncs5DAMiD4nNnR8NBfyghGCWvCVifVwvA8B8TJxE1aiyiv2L429BCWfyzAme5sZW8rDb14NeCQHhZbtNqfXhcp2tAnaAT",{"encoding":"base58"}]}'
```
```json Request
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "sendTransaction",
  "params": [
    "4hXTCkRzt9WyecNzV1XPgCDfGAZzQKNxLXgynz5QDuWWPSAZBZSHptvWRL3BjCvzUXRdKvHL2b7yGrRQcWyaqsaBCncVG7BFggS8w9snUts67BSh3EqKpXLUm5UMHfD7ZBe9GhARjbNQMLJ1QD3Spr6oMTBU6EhdB4RD8CP2xUxr2u3d6fos36PD98XS6oX8TQjLpsMwncs5DAMiD4nNnR8NBfyghGCWvCVifVwvA8B8TJxE1aiyiv2L429BCWfyzAme5sZW8rDb14NeCQHhZbtNqfXhcp2tAnaAT",
    { "encoding": "base58" }
  ]
}
```

```json Response
{
  "jsonrpc": "2.0",
  "result": "2id3YC2jK9G5Wo2phDx4gJVAew8DcY5NAojnVuao8rkxwPYPe8cSwE5GzhEgJA2y8fVjDEo6iR7E6QLa2S9sJoKa",
  "id": 1
}
```

> Warning: Transactions must be signed before submission. The `sendTransaction` method does not sign transactions.

***

## simulateTransaction
**POST** - JSON-RPC

Simulates sending a transaction without requiring a valid signature. Useful for testing transaction execution.

### `params[0]`, string, required

Transaction as an encoded string.

### `params[1]`, object

Configuration object:
  - `commitment` (string) - commitment level
  - `sigVerify` (boolean) - verify signatures (conflicts with `replaceRecentBlockhash`)
  - `replaceRecentBlockhash` (boolean) - replace blockhash with latest
  - `encoding` (string) - `base58` or `base64`
  - `innerInstructions` (boolean) - return inner instructions in result
  - `minContextSlot` (integer) - minimum slot for evaluation
  - `accounts` (object) - `{ encoding, addresses }` to return account state

```bash curl
curl https://rpc.nln.clr3.org \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"jsonrpc":"2.0","id":1,"method":"simulateTransaction","params":["AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAEDArczbMia1tLmq7zz4DinMNN0pJ1JtLdqIJPUw3YrGCzYAMHBsgN27lcgB6H2WQvFgyZuJYHa46puOQo9yQ8CVQbd9uHXZaGT2cvhRs7reawctIXtX1s3kTqM9YV+/wCph/IAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",{"encoding":"base64","replaceRecentBlockhash":true}]}'
```
```json Request
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "simulateTransaction",
  "params": [
    "AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAEDArczbMia1tLmq7zz4DinMNN0pJ1JtLdqIJPUw3YrGCzYAMHBsgN27lcgB6H2WQvFgyZuJYHa46puOQo9yQ8CVQbd9uHXZaGT2cvhRs7reawctIXtX1s3kTqM9YV+/wCph/IAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
    {
      "encoding": "base64",
      "replaceRecentBlockhash": true
    }
  ]
}
```

```json Response
{
  "jsonrpc": "2.0",
  "result": {
    "context": { "slot": 218 },
    "value": {
      "accounts": null,
      "err": null,
      "logs": [
        "Program 11111111111111111111111111111111 invoke [1]",
        "Program 11111111111111111111111111111111 success"
      ],
      "returnData": null,
      "unitsConsumed": 150
    }
  },
  "id": 1
}
```

### `result.value`, object

### properties

Transaction error (null if success).

    ### `logs`, array

Array of log messages from execution.

    ### `accounts`, array

Returned account states if requested.

    ### `unitsConsumed`, integer

Compute units consumed.

    ### `returnData`, object

Return data from the transaction.