@dashevo/dashcore-lib/docs/usage/transaction_input.md

A pure and powerful JavaScript Dash library.

**Usage**: `new Transaction.Input(params)`  
**Description**: Instantiate an Input from an Object

| parameters | type   | required | Description                         |
| ---------- | ------ | -------- | ----------------------------------- |
| **params** | Object | yes      | The encoded data in various formats |

**Returns**: {Input} A new instance of an Input

## Input.fromObject(obj)

**Description**: Instantiate a new Input from a plain JavaScript object

**Parameters**:

| parameters | type   | required | Description                      |
| ---------- | ------ | -------- | -------------------------------- |
| **obj**    | Object | yes      | The output from input.toObject() |

**Returns**: {Input} A instance of an Input

## .fromBufferReader(br)

**Description**: Set a script from a Buffer. Replace any previously set script

**Parameters**:

| parameters | type   | required | Description |
| ---------- | ------ | -------- | ----------- |
| **br**     | Buffer | yes      |             |

**Returns**: {Input}

## .toBufferWriter(bw)

**Description**: Set a script from a Buffer. Replace any previously set script

**Parameters**:

| parameters | type         | required | Description |
| ---------- | ------------ | -------- | ----------- |
| **bw**     | BufferWriter | no       |             |

**Returns**: {BufferWriter}

## .setScript(script)

**Description**: Set a script from a Buffer. Replace any previously set script

**Parameters**:

| parameters | type                 | required | Description |
| ---------- | -------------------- | -------- | ----------- |
| **script** | Script/Buffer/String | yes      |             |

**Returns**: {Input}

## .getSignatures(transaction, privateKey, inputIndex, number, sigType, addressHash)

**Description**: Retrieve signatures for the provided PrivateKey.

**Parameters**:

| parameters      | type        | required | Description                                                                                      |
| --------------- | ----------- | -------- | ------------------------------------------------------------------------------------------------ |
| **transaction** | Transaction | yes      | the transaction to be signed                                                                     |
| **privateKey**  | PrivateKey  | yes      | the private key to use when signing                                                              |
| **inputIndex**  | Number      | yes      | the index of this input in the provided transaction                                              |
| **sigType**     | Number      | no       | defaults to Signature.SIGHASH_ALL                                                                |
| **addressHash** | Number      | no       | if provided, don't calculate the hash of the public key associated with the private key provided |

**Returns**: {}

## .isFinal()

**Description**: Answer if the input is final based on it's sequence number

**Parameters**: None.

**Returns**: {Boolean} - based on it's sequence number, is input final.

## .isValidSignature(transaction, signature)

**Description**: Verifies the signature and returns if it's valid or not

**Parameters**:

| parameters      | type        | required | Description              |
| --------------- | ----------- | -------- | ------------------------ |
| **transaction** | Transaction | yes      | the transaction to check |
| **signature**   | Object      | yes      | the signature to verify  |

**Returns**: {Boolean} - is the signature valid

## .isNull()

**Description**: Will return true if this is a coinbase input (represents no input)

**Parameters**: None.

**Returns**: {Boolean} is this a coinbase input

## .toObject() / .toJSON()

**Description**: Will return an object representation of the input

**Parameters**: None.

**Returns**: {Object} A plain object with the input informations