# Transaction

### call <a href="#call" id="call"></a>

```javascript
caver.klay.call(callObject [, defaultBlock] [, callback])
```

Executes a message call transaction, which is directly executed in the Klaytn Virtual Machine of the node, but never mined into the blockchain.

**Parameters**

| Name         | Type             | Description                                                                                                                                                                                                                                                               |
| ------------ | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| callObject   | Object           | A transaction object with the difference that for calls the from property is optional as well. [An encoded function call](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay.abi.md#encodefunctioncall) must be set in the data field of the transaction object. |
| defaultBlock | Number \| String | (optional) If you pass this parameter, it will not use the default block set with [caver.klay.defaultBlock](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/block.md#defaultblock).                                                                           |
| callback     | Function         | (optional) Optional callback, returns an error object as the first parameter and the result as the second.                                                                                                                                                                |

**Return Value**

`Promise` returns `String`: The returned data of the call, *e.g.*, a smart contract functions return value.

**Example**

```javascript
> caver.klay.call({
    to: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe", // contract address
    data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
})
.then(console.log);

"0x000000000000000000000000000000000000000000000000000000000000000a"
```

### estimateGas <a href="#estimategas" id="estimategas"></a>

```javascript
caver.klay.estimateGas(callObject [, callback])
```

Executes a message call or transaction and returns the amount of the gas used for the simulated call/transaction.

**Parameters**

| Name       | Type     | Description                                                                                                                                                                                                                                                               |
| ---------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| callObject | Object   | A transaction object with the difference that for calls the from property is optional as well. [An encoded function call](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay.abi.md#encodefunctioncall) must be set in the data field of the transaction object. |
| callback   | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second.                                                                                                                                                                |

**Return Value**

`Promise` returns `Number` - the used gas for the simulated call/transaction.

**Example**

```javascript
> caver.klay.estimateGas({
    to: "0x11f4d0A3c12e86B4b5F39B213F7E19D048276DAe",
    data: "0xc6888fa10000000000000000000000000000000000000000000000000000000000000003"
})
.then(console.log);

40
```

### estimateComputationCost <a href="#estimatecomputationcost" id="estimatecomputationcost"></a>

```javascript
caver.klay.estimateComputationCost(callObject [, defaultBlock] [, callback])
```

Generates and returns an estimate of how much computation cost will be spent to execute the transaction. Klaytn limits the computation cost of a transaction to `100000000` currently not to take too much time by a single transaction. The transaction will not be added to the blockchain.

**Parameters**

| Name         | Type             | Description                                                                                                                                                                                                                                                               |
| ------------ | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| callObject   | Object           | A transaction object with the difference that for calls the from property is optional as well. [An encoded function call](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay.abi.md#encodefunctioncall) must be set in the data field of the transaction object. |
| defaultBlock | Number \| String | (optional) If you don't pass this parameter, the default block set by [caver.klay.defaultBlock](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/block.md#defaultblock) will be used.                                                                          |
| callback     | Function         | (optional) Optional callback, returns an error object as the first parameter and the result as the second.                                                                                                                                                                |

**Return Value**

`Promise` returns `Number` - The amount of computation cost used.

**Example**

```javascript
> caver.klay.estimateComputationCost({
        to: '0xf796b2F18507Ec8F8C19e9F0c03092888093ebAc',
        data : '0xd14e62b80000000000000000000000000000000000000000000000000000000000000022'
    }).then(console.log);
0x5773

// With 'latest' block tag
> caver.klay.estimateComputationCost({
        to: '0xf796b2F18507Ec8F8C19e9F0c03092888093ebAc',
        data : '0xd14e62b80000000000000000000000000000000000000000000000000000000000000022'
    }, 'latest').then(console.log);
0x5773
```

### decodeTransaction <a href="#decodetransaction" id="decodetransaction"></a>

```javascript
caver.klay.decodeTransaction(rawTransaction)
```

Returns a transaction object containing all decoded values from the given `rawTransaction`, an RLP-encoded transaction. Since all transaction types except for legacy transaction can have multiple signatures of sender and fee payer, the existing returned fields v, r, s and payerV, payerR, payerS are the 0th signature of sender and fee payer.

**NOTE** caver.klay.decodeTransaction is supported from **v1.0.1-rc.8**. To use this feature, please install [v1.0.1-rc.8](https://www.npmjs.com/package/caver-js/v/1.0.1-rc.8) or higher.

**NOTE** To support multiple signature, `signatures` and `feePayerSignatures` properties have been added since caver-js [v1.2.0-rc.3](https://www.npmjs.com/package/caver-js/v/1.2.0-rc.3).

**Parameters**

| Name           | Type   | Description                   |
| -------------- | ------ | ----------------------------- |
| rawTransaction | String | RLP encoded transaction data. |

**Return Value**

| Type   | Description                                                                                                                                                                                                               |
| ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Object | A transaction object. Depending on the transaction type, the returned transaction object has different properties. For the list of properties included in each transaction type, see [SendTransaction](#sendtransaction). |

**Example**

```javascript
// Basic Transaction
> caver.klay.decodeTransaction('0xf86b038505d21dba00843b9ac9ff94d03227635c90c7986f0e3a4e551cefbca8c5531685174876e8008026a06fc7412ad1801b4790e7a5a5097fdbef01bc9fe1b970d08232184d110226c221a04665f772edbc4ba4dfbf189d89a9b9cb1e5cdcea0fd5a8b1a497b9c275e5267c')
{ 
    type: 'LEGACY',
    nonce: '0x03',
    gasPrice: '0x05d21dba00',
    gas: '0x3b9ac9ff',
    to: '0xd03227635c90c7986f0e3a4e551cefbca8c55316',
    value: '0x174876e800',
    data: '0x',
    v: '0x26',
    r: '0x6fc7412ad1801b4790e7a5a5097fdbef01bc9fe1b970d08232184d110226c221',
    s: '0x4665f772edbc4ba4dfbf189d89a9b9cb1e5cdcea0fd5a8b1a497b9c275e5267c',
    signatures: [ 
        '0x26',
        '0x6fc7412ad1801b4790e7a5a5097fdbef01bc9fe1b970d08232184d110226c221',
        '0x4665f772edbc4ba4dfbf189d89a9b9cb1e5cdcea0fd5a8b1a497b9c275e5267c' 
    ]
}

// Fee Delegation
> caver.klay.decodeTransaction('0x09f8dd2c8505d21dba00830dbba094a36960d00c9cbf10e80928eead73ff308193bde70194ad8d5b8c7da3746df7de39c41fa572d660aa8e91f847f845824e43a099c0a4c85bb9f2c0be2646b963201680e2f76128e4fd1f54d3f9cf80d1d117e7a069b62aa6640c8aa3606a67869fe062dde1c61a60aea5c5161550ff11ee71c24b946a4b71a6796c2fd376fb0526385e0783da86a039f847f845824e43a0bdfdc50649c8f52930a330b2e44d92f8943b28c7ff7edd8ff7f2f95e617c0d77a06e96bdd983494f6967f1a26d2f0ae991a4e8ebef1ac3c9029251a18c19002ab3')
{ 
    type: 'FEE_DELEGATED_VALUE_TRANSFER',
    nonce: '0x2c',
    gasPrice: '0x05d21dba00',
    gas: '0x0dbba0',
    to: '0xa36960d00c9cbf10e80928eead73ff308193bde7',
    value: '0x01',
    from: '0xad8d5b8c7da3746df7de39c41fa572d660aa8e91',
    v: '0x4e43',
    r: '0x99c0a4c85bb9f2c0be2646b963201680e2f76128e4fd1f54d3f9cf80d1d117e7',
    s: '0x69b62aa6640c8aa3606a67869fe062dde1c61a60aea5c5161550ff11ee71c24b',
    signatures: [
        [ 
            '0x4e43',
            '0x99c0a4c85bb9f2c0be2646b963201680e2f76128e4fd1f54d3f9cf80d1d117e7',
            '0x69b62aa6640c8aa3606a67869fe062dde1c61a60aea5c5161550ff11ee71c24b' 
        ] 
    ],
    feePayer: '0x6a4b71a6796c2fd376fb0526385e0783da86a039',
    payerV: '0x4e43',
    payerR: '0xbdfdc50649c8f52930a330b2e44d92f8943b28c7ff7edd8ff7f2f95e617c0d77',
    payerS: '0x6e96bdd983494f6967f1a26d2f0ae991a4e8ebef1ac3c9029251a18c19002ab3',
    feePayerSignatures: [ 
        [ 
            '0x4e43',
            '0xbdfdc50649c8f52930a330b2e44d92f8943b28c7ff7edd8ff7f2f95e617c0d77',
            '0x6e96bdd983494f6967f1a26d2f0ae991a4e8ebef1ac3c9029251a18c19002ab3' 
        ] 
    ]
}

// Partial Fee Delegation
> caver.klay.decodeTransaction('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')
{ 
    type: 'FEE_DELEGATED_SMART_CONTRACT_DEPLOY_WITH_RATIO',
    nonce: '0x0a',
    gasPrice: '0x05d21dba00',
    gas: '0x3b9ac9ff',
    to: '0x',
    value: '0x',
    from: '0x90b3e9a3770481345a7f17f22f16d020bccfd33e',
    data: '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',
    humanReadable: false,
    feeRatio: '0x21',
    codeFormat: '0x',
    v: '0x25',
    r: '0xd8cdc1219df8bbca8a00255420a5bec0f602e6266b76ce7dcf5b0b26bd7fe3b9',
    s: '0x5557496a3a17f784c3eb40acbb526dfbc20ae6b00c633a0186d804cd9137b13e',
    signatures: [ 
        [ 
            '0x25',
            '0xd8cdc1219df8bbca8a00255420a5bec0f602e6266b76ce7dcf5b0b26bd7fe3b9',
            '0x5557496a3a17f784c3eb40acbb526dfbc20ae6b00c633a0186d804cd9137b13e' 
        ] 
    ],
    feePayer: '0x33f524631e573329a550296f595c820d6c65213f',
    payerV: '0x25',
    payerR: '0x41a4c4bf0e3039d04472beae4135a14c26ae4c88bad08d5f0acf61f7c0eb60df',
    payerS: '0x3d1658f38e5c2089d64985fb33cb13db2e41cde6958ba2cfcfaba685a7f565e2',
    feePayerSignatures: [ 
        [ 
            '0x25',
            '0x41a4c4bf0e3039d04472beae4135a14c26ae4c88bad08d5f0acf61f7c0eb60df',
            '0x3d1658f38e5c2089d64985fb33cb13db2e41cde6958ba2cfcfaba685a7f565e2' 
        ] 
    ]
}
```

### getTransaction <a href="#gettransaction" id="gettransaction"></a>

```javascript
caver.klay.getTransaction(transactionHash [, callback])
```

Returns a transaction matching the given transaction hash.

**Parameters**

| Name            | Type     | Description                                                                                                |
| --------------- | -------- | ---------------------------------------------------------------------------------------------------------- |
| transactionHash | String   | The transaction hash.                                                                                      |
| callback        | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second. |

**Return Value**

`Promise` returns `Object` - A transaction object, or `null` when no transaction was found:

| Name               | Type         | Description                                                                                                                                                                                                  |
| ------------------ | ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| blockHash          | 32-byte DATA | Hash of the block where this transaction was in. `null` when it is pending.                                                                                                                                  |
| blockNumber        | QUANTITY     | Block number where this transaction was in. `null` when it is pending.                                                                                                                                       |
| codeFormat         | String       | (optional) The code format of smart contract code.                                                                                                                                                           |
| feePayer           | 20-byte DATA | (optional) Address of the fee payer.                                                                                                                                                                         |
| feePayerSignatures | Array        | (optional) An array of fee payer's signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s. |
| feeRatio           | QUANTITY     | (optional) Fee ratio of the fee payer. If it is 30, 30% of the fee will be paid by the fee payer. 70% will be paid by the sender.                                                                            |
| from               | 20-byte DATA | Address of the sender.                                                                                                                                                                                       |
| gas                | QUANTITY     | Gas provided by the sender.                                                                                                                                                                                  |
| gasPrice           | QUANTITY     | Gas price provided by the sender in peb.                                                                                                                                                                     |
| hash               | 32-byte DATA | Hash of the transaction.                                                                                                                                                                                     |
| humanReadable      | Boolean      | (optional) `true` if the address is humanReadable, `false` if the address is not humanReadable.                                                                                                              |
| key                | String       | (optional) Key of the newly created account.                                                                                                                                                                 |
| input              | DATA         | (optional) The data sent along with the transaction.                                                                                                                                                         |
| nonce              | QUANTITY     | The number of transactions made by the sender prior to this one.                                                                                                                                             |
| senderTxHash       | 32-byte DATA | (optional) Hash of the tx without the fee payer's address and signature. This value is always the same as the value of `hash` for non fee-delegated transactions.                                            |
| signatures         | Array        | An array of signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.                        |
| to                 | 20-byte DATA | Address of the receiver. `null` when it is a contract creation transaction.                                                                                                                                  |
| transactionIndex   | QUANTITY     | Integer of the transaction index position in the block. `null` when it is pending.                                                                                                                           |
| type               | String       | A string representing the type of the transaction.                                                                                                                                                           |
| typeInt            | QUANTITY     | An integer representing the type of the transaction.                                                                                                                                                         |
| value              | QUANTITY     | Value transferred in peb.                                                                                                                                                                                    |

**Example**

```javascript
> caver.klay.getTransaction('0x2d26f602cfbb4c662931592bf2c4ee18d29f09683be5b9e8d589ff935fca0b97')
  .then(console.log);
{ 
    blockHash: '0xd6f3bc2bd7853ed423677766b5332c3e55d900abf4252ede196661cd58e817a6',
    blockNumber: 141766,
    from: '0x8948Ab8526fDA9a7349Ee8FCa5372e46d0268777',
    gas: 20000000,
    gasPrice: '25000000000',
    hash: '0x2d26f602cfbb4c662931592bf2c4ee18d29f09683be5b9e8d589ff935fca0b97',
    input: '0x',
    nonce: 8,
    signatures:[{ 
        V: '0xfe9',
        R: '0x76a0ac07a371fe3849f46a115d62830e611e62fab91714bb66fe18a937557666',
        S: '0x1daace52366434ab11287d4f5ebe9c87f314e45d13f05093bbcdd5862fcf462e' 
    }],
    to: '0x2259cFDae62F9853f84298aAf20C999391B1c6a3',
    transactionIndex: 0,
    type: 'TxTypeLegacyTransaction',
    typeInt: 0,
    value: '1' 
}
```

### getTransactionBySenderTxHash <a href="#gettransactionbysendertxhash" id="gettransactionbysendertxhash"></a>

```javascript
caver.klay.getTransactionBySenderTxHash(senderTxHash [, callback])
```

Returns the information about the transaction identified by the given `senderTxHash`. Please note that this API returns correct result only if the indexing feature is enabled in the node by `--sendertxhashindexing`. Use [isSenderTxHashIndexingEnabled](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/config.md#issendertxhashindexingenabled) to check if the indexing feature is enabled or not.

**Parameters**

| Name         | Type     | Description                                                                                                                       |
| ------------ | -------- | --------------------------------------------------------------------------------------------------------------------------------- |
| senderTxHash | String   | Hash of a transaction that is signed only by the sender. See [SenderTxHash](/content/klaytn/design/transactions.md#sendertxhash). |
| callback     | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second.                        |

**Return Value**

`Promise` returns `Object` - A transaction object, or `null` when no transaction was found:

| Name               | Type         | Description                                                                                                                                                                                                   |
| ------------------ | ------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| blockHash          | 32-byte DATA | Hash of the block where this transaction was in. `null` when it is pending.                                                                                                                                   |
| blockNumber        | QUANTITY     | Block number where this transaction was in. `null` when it is pending.                                                                                                                                        |
| codeFormat         | String       | (optional) The code format of smart contract code.                                                                                                                                                            |
| feePayer           | 20-byte DATA | Address of the fee payer.                                                                                                                                                                                     |
| feePayerSignatures | Array        | An array of fee payer's signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.             |
| feeRatio           | QUANTITY     | (optional) Fee ratio of the fee payer. If it is 30, 30% of the fee will be paid by the fee payer. 70% will be paid by the sender.                                                                             |
| from               | 20-byte DATA | Address of the sender.                                                                                                                                                                                        |
| gas                | QUANTITY     | Gas provided by the sender.                                                                                                                                                                                   |
| gasPrice           | QUANTITY     | Gas price provided by the sender in peb.                                                                                                                                                                      |
| hash               | 32-byte DATA | Hash of the transaction.                                                                                                                                                                                      |
| humanReadable      | Boolean      | (optional) `true` if the address is humanReadable, `false` if the address is not humanReadable.                                                                                                               |
| key                | String       | (optional) Key of the newly created account.                                                                                                                                                                  |
| input              | DATA         | (optional) The data sent along with the transaction.                                                                                                                                                          |
| nonce              | QUANTITY     | The number of transactions made by the sender prior to this one.                                                                                                                                              |
| senderTxHash       | 32-byte DATA | Hash of a transaction that is signed only by the sender. See [SenderTxHash](/content/klaytn/design/transactions.md#sendertxhash). This value is always the same as `hash` for non fee-delegated transactions. |
| signatures         | Array        | An array of signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.                         |
| to                 | 20-byte DATA | Address of the receiver. `null` when it is a contract creation transaction.                                                                                                                                   |
| transactionIndex   | QUANTITY     | Integer of the transaction index position in the block. `null` when it is pending.                                                                                                                            |
| type               | String       | A string representing the type of the transaction.                                                                                                                                                            |
| typeInt            | QUANTITY     | An integer representing the type of the transaction.                                                                                                                                                          |
| value              | QUANTITY     | Value transferred in peb.                                                                                                                                                                                     |

**Example**

```javascript
> caver.klay.getTransactionBySenderTxHash('0x8c0b092fed92a6619666efd582f7d71fbc3d784781072dd26741715b3731ab22').then(console.log);
{
    blockHash: '0x56e950bd9283c11ad2dab7cfcbacd9164aff2f6cbeb99dd2a7b754eb210753af',
    blockNumber: 773,
    codeFormat: '0x0',
    feePayer: '0xabae1fe62aebbfabeff072eb815d54c3359a45f4',
    feePayerSignatures: [
        { 
            V: '0x4e43',
            R: '0x16293eefe0f13228ae47af67ecfe659448d8f80d9667a67a25d82c72b5ee246a',
            S: '0x3c4043324bee41a6cbab905d3b4e740a3a18fde021260fc1196f73d2ab037b91' } ],
    feeRatio: '0x14',
    from: '0x3F0E31836C7AABb4C9e9B19d5D61359a9139E949',
    gas: 900000,
    gasPrice: '25000000000',
    hash: '0x2ab7665d25f8f64969fa03b8d5e40a70485bb56a4e72ca2fe1e467fff904c173',
    humanReadable: false,
    input: '0x6080604052600080556040516020806101fa8339810180604052810190808051906020019092919050505080600081905550506101b9806100416000396000f300608060405260043610610062576000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806306661abd1461006757806342cbb15c14610092578063a87d942c146100bd578063d14e62b8146100e8575b600080fd5b34801561007357600080fd5b5061007c610108565b6040518082815260200191505060405180910390f35b34801561009e57600080fd5b506100a761010e565b6040518082815260200191505060405180910390f35b3480156100c957600080fd5b506100d2610116565b6040518082815260200191505060405180910390f35b6101066004803603810190808035906020019092919050505061014c565b005b60005481565b600043905090565b60007f7197668b8690d2324050bc9ad83b2b5ca0b3f5336cb178ffa2aa07006b51b65160405160405180910390a1600054905090565b7fe8451a9161f9159bc887328b634789768bd596360ef07c5a5cbfb927c44051f9816040518082815260200191505060405180910390a180600081905550505600a165627a7a723058203cb41ebe3d7128a72c997645693c64789a9b5fdeae26158fb28b55e567e805c700290000000000000000000000000000000000000000000000000000000000000001',
    nonce: 9,
    senderTxHash: '0x8c0b092fed92a6619666efd582f7d71fbc3d784781072dd26741715b3731ab22',
    signatures: [
        { 
            V: '0x4e43',
            R: '0x1b48ee0508d242c9568d7e09212d62137080d68d86c1d067b31b4bb4196c9960',
            S: '0x24982f60b37859d7c39d7bd9c00b446196b3a08b27f80dbc9ceca8ee52513b11' 
        } 
    ],
    to: null,
    transactionIndex: 0,
    type: 'TxTypeFeeDelegatedSmartContractDeployWithRatio',
    typeInt: 42,
    value: '1'
}
```

### getTransactionFromBlock <a href="#gettransactionfromblock" id="gettransactionfromblock"></a>

```javascript
caver.klay.getTransactionFromBlock(hashStringOrNumber, indexNumber [, callback])
```

Returns a transaction based on a block hash or number and the transactions index position.

**Parameters**

| Name               | Type     | Description                                                                                                |
| ------------------ | -------- | ---------------------------------------------------------------------------------------------------------- |
| hashStringOrNumber | String   | A block number or hash. Or the string `"genesis"` or `"latest"`.                                           |
| indexNumber        | Number   | The transactions index position.                                                                           |
| callback           | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second. |

**Return Value**

`Object` - A transaction object, see [caver.klay.getTransaction](#gettransaction)

**Examples**

```javascript
> caver.klay.getTransactionFromBlock('0x4534534534', 2).then(console.log);
// see caver.klay.getTransaction
```

### getTransactionReceipt <a href="#gettransactionreceipt" id="gettransactionreceipt"></a>

```javascript
caver.klay.getTransactionReceipt(transactionHash [, callback])
```

Returns the receipt of a transaction by transaction hash.

**Parameters**

| Name            | Type     | Description                                                                                                |
| --------------- | -------- | ---------------------------------------------------------------------------------------------------------- |
| transactionHash | String   | The transaction hash                                                                                       |
| callback        | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second. |

**Return Value**

`Promise` returns `Object` - A transaction receipt object, or `null` when no receipt was found:

| Name               | Type           | Description                                                                                                                                                                                                                         |
| ------------------ | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| blockHash          | 32-byte String | Hash of the block where this transaction was in.                                                                                                                                                                                    |
| blockNumber        | Number         | Block number where this transaction was in.                                                                                                                                                                                         |
| codeFormat         | String         | (optional) The code format of smart contract code.                                                                                                                                                                                  |
| contractAddress    | DATA           | The contract address created, if the transaction was a contract creation, otherwise `null`.                                                                                                                                         |
| feePayer           | 20-byte DATA   | (optional) Address of the fee payer.                                                                                                                                                                                                |
| feePayerSignatures | Array          | (optional) An array of fee payer's signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.                        |
| feeRatio           | QUANTITY       | (optional) Fee ratio of the fee payer. If it is 30, 30% of the fee will be paid by the fee payer. 70% will be paid by the sender.                                                                                                   |
| from               | 20-byte DATA   | Address of the sender.                                                                                                                                                                                                              |
| gas                | QUANTITY       | Gas provided by the sender.                                                                                                                                                                                                         |
| gasPrice           | QUANTITY       | Gas price provided by the sender in peb.                                                                                                                                                                                            |
| gasUsed            | QUANTITY       | The amount of gas used by this specific transaction alone.                                                                                                                                                                          |
| humanReadable      | Boolean        | (optional) `true` if the address is humanReadable, `false` if the address is not humanReadable.                                                                                                                                     |
| key                | String         | (optional) Key of the newly created account.                                                                                                                                                                                        |
| input              | DATA           | (optional) The data sent along with the transaction.                                                                                                                                                                                |
| logs               | Array          | Array of log objects, which this transaction generated.                                                                                                                                                                             |
| logsBloom          | 256-byte DATA  | Bloom filter for light clients to quickly retrieve related logs.                                                                                                                                                                    |
| nonce              | QUANTITY       | The number of transactions made by the sender prior to this one.                                                                                                                                                                    |
| senderTxHash       | 32-byte DATA   | (optional) Hash of a transaction that is signed only by the sender. See [SenderTxHash](/content/klaytn/design/transactions.md#sendertxhash). This value is always the same as `transactionHash` for non fee-delegated transactions. |
| signatures         | Array          | An array of signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.                                               |
| status             | Boolean        | `true` if the transaction was successful, `false` if the Klaytn Virtual Machine reverted the transaction.                                                                                                                           |
| txError            | QUANTITY       | (optional) detailed error code if `status` is equal to zero.                                                                                                                                                                        |
| to                 | 20-byte DATA   | Address of the receiver. `null` when it is a contract creation transaction.                                                                                                                                                         |
| transactionHash    | 32-byte DATA   | Hash of the transaction.                                                                                                                                                                                                            |
| transactionIndex   | QUANTITY       | Integer of the transaction index position in the block.                                                                                                                                                                             |
| type               | String         | A string representing the type of the transaction.                                                                                                                                                                                  |
| typeInt            | QUANTITY       | An integer representing the type of the transaction.                                                                                                                                                                                |
| value              | QUANTITY       | Value transferred in peb.                                                                                                                                                                                                           |

**Example**

```javascript
> caver.klay.getTransactionReceipt('0x9108f22693de7b16ece4db2c8d11c004feae31973acc2ecb9dbd61cd57bb0d7b')
  .then(console.log);
{ 
    blockHash: '0x62f0b4e4d2c0fdeda968bf82688a6b4426fb0b75c83ebd39a04633e087060f00',
    blockNumber: 140949,
    contractAddress: null,
    from: '0x8948ab8526fda9a7349ee8fca5372e46d0268777',
    gas: '0x1312d00',
    gasPrice: '0x5d21dba00',
    gasUsed: 21000,
    input: '0x',
    logs: [],
    logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
    nonce: '0x6',
    signatures: [{ 
        V:'0xfe9',
        R:'0x95e5fc90a27b4a364f4047072474147fb8885213acbc4ac89902da28ddea3931',
        S:'0xeebe7d37c047f6a7b841da5c6ff2849eb6f99b689666da30f48b60a12028e59' 
    }],
    status: true,
    to: '0x2259cfdae62f9853f84298aaf20c999391b1c6a3',
    transactionHash: '0x9108f22693de7b16ece4db2c8d11c004feae31973acc2ecb9dbd61cd57bb0d7b',
    transactionIndex: 0,
    type: 'TxTypeLegacyTransaction',
    typeInt: 0,
    value: '0x1'
}
```

### getTransactionReceiptBySenderTxHash <a href="#gettransactionreceiptbysendertxhash" id="gettransactionreceiptbysendertxhash"></a>

```javascript
caver.klay.getTransactionReceiptBySenderTxHash(senderTxHash [, callback])
```

Returns the receipt of a transaction identified by the given `senderTxHash`.

**NOTE**: The receipt is not available for pending transactions. Please note that this API returns correct result only if the indexing feature is enabled in the node by `--sendertxhashindexing`. This can be checked by calling [isSenderTxHashIndexingEnabled](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/config.md#issendertxhashindexingenabled).

**Parameters**

| Name         | Type     | Description                                                                                                                       |
| ------------ | -------- | --------------------------------------------------------------------------------------------------------------------------------- |
| senderTxHash | String   | Hash of a transaction that is signed only by the sender. See [SenderTxHash](/content/klaytn/design/transactions.md#sendertxhash). |
| callback     | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second.                        |

**Return Value**

`Promise` returns `Object` - A transaction receipt object, or `null` when no receipt was found:

| Name               | Type           | Description                                                                                                                                                                                                              |
| ------------------ | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| blockHash          | 32-byte String | Hash of the block where this transaction was in.                                                                                                                                                                         |
| blockNumber        | Number         | Block number where this transaction was in.                                                                                                                                                                              |
| codeFormat         | String         | (optional) The code format of smart contract code.                                                                                                                                                                       |
| contractAddress    | DATA           | The contract address created, if the transaction was a contract creation, otherwise `null`.                                                                                                                              |
| feePayer           | 20-byte DATA   | Address of the fee payer.                                                                                                                                                                                                |
| feePayerSignatures | Array          | An array of fee payer's signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.                        |
| feeRatio           | QUANTITY       | (optional) Fee ratio of the fee payer. If it is 30, 30% of the fee will be paid by the fee payer. 70% will be paid by the sender.                                                                                        |
| from               | 20-byte DATA   | Address of the sender.                                                                                                                                                                                                   |
| gas                | QUANTITY       | Gas provided by the sender.                                                                                                                                                                                              |
| gasPrice           | QUANTITY       | Gas price provided by the sender in peb.                                                                                                                                                                                 |
| gasUsed            | QUANTITY       | The amount of gas used by this specific transaction alone.                                                                                                                                                               |
| humanReadable      | Boolean        | (optional) `true` if the address is humanReadable, `false` if the address is not humanReadable.                                                                                                                          |
| key                | String         | (optional) Key of the newly created account.                                                                                                                                                                             |
| input              | DATA           | (optional) The data sent along with the transaction.                                                                                                                                                                     |
| logs               | Array          | Array of log objects, which this transaction generated.                                                                                                                                                                  |
| logsBloom          | 256-byte DATA  | Bloom filter for light clients to quickly retrieve related logs.                                                                                                                                                         |
| nonce              | QUANTITY       | The number of transactions made by the sender prior to this one.                                                                                                                                                         |
| senderTxHash       | 32-byte DATA   | Hash of a transaction that is signed only by the sender. See [SenderTxHash](/content/klaytn/design/transactions.md#sendertxhash). This value is always the same as `transactionHash` for non fee-delegated transactions. |
| signatures         | Array          | An array of signature objects. A signature object contains three fields (V, R, and S). V contains ECDSA recovery id. R contains ECDSA signature r while S contains ECDSA signature s.                                    |
| status             | Boolean        | `true` if the transaction was successful, `false` if the Klaytn Virtual Machine reverted the transaction.                                                                                                                |
| txError            | QUANTITY       | (optional) detailed error code if `status` is equal to zero.                                                                                                                                                             |
| to                 | 20-byte DATA   | Address of the receiver. `null` when it is a contract creation transaction.                                                                                                                                              |
| transactionHash    | 32-byte DATA   | Hash of the transaction.                                                                                                                                                                                                 |
| transactionIndex   | QUANTITY       | Integer of the transaction index position in the block.                                                                                                                                                                  |
| type               | String         | A string representing the type of the transaction.                                                                                                                                                                       |
| typeInt            | QUANTITY       | An integer representing the type of the transaction.                                                                                                                                                                     |
| value              | QUANTITY       | Value transferred in peb.                                                                                                                                                                                                |

**Example**

```javascript
> caver.klay.getTransactionReceiptBySenderTxHash('0x8c0b092fed92a6619666efd582f7d71fbc3d784781072dd26741715b3731ab22').then(console.log);
{
    blockHash: '0x56e950bd9283c11ad2dab7cfcbacd9164aff2f6cbeb99dd2a7b754eb210753af',
    blockNumber: 773,
    codeFormat: '0x0',
    contractAddress: '0x71163abc3b051bC2Af71e7c68eD0ffeA6182cde1',
    feePayer: '0xabae1fe62aebbfabeff072eb815d54c3359a45f4',
    feePayerSignatures: [
        { 
            V: '0x4e43',
            R: '0x16293eefe0f13228ae47af67ecfe659448d8f80d9667a67a25d82c72b5ee246a',
            S: '0x3c4043324bee41a6cbab905d3b4e740a3a18fde021260fc1196f73d2ab037b91' 
        }
    ],
    feeRatio: '0x14',
    from: '0x3f0e31836c7aabb4c9e9b19d5d61359a9139e949',
    gas: '0xdbba0',
    gasPrice: '0x5d21dba00',
    gasUsed: 235217,
    humanReadable: false,
    input: '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',
    logs: [],
    logsBloom: '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
    nonce: '0x9',
    senderTxHash: '0x8c0b092fed92a6619666efd582f7d71fbc3d784781072dd26741715b3731ab22',
    signatures: [ 
        { 
            V: '0x4e43',
            R: '0x1b48ee0508d242c9568d7e09212d62137080d68d86c1d067b31b4bb4196c9960',
            S: '0x24982f60b37859d7c39d7bd9c00b446196b3a08b27f80dbc9ceca8ee52513b11' 
        }
    ],
    status: true,
    to: null,
    transactionHash: '0x2ab7665d25f8f64969fa03b8d5e40a70485bb56a4e72ca2fe1e467fff904c173',
    transactionIndex: 0,
    type: 'TxTypeFeeDelegatedSmartContractDeployWithRatio',
    typeInt: 42,
    value: '0x1'
}
```

### sendSignedTransaction <a href="#sendsignedtransaction" id="sendsignedtransaction"></a>

```javascript
caver.klay.sendSignedTransaction(signedTransactionData [, callback])
```

Sends an already signed transaction, generated using `caver.klay.accounts.signTransaction`.

**NOTE** `caver.klay.sendSignedTransaction` can accepts an object as a parameter since caver-js [v1.2.0](https://www.npmjs.com/package/caver-js/v/1.2.0). The object should include an RLP-encoded transaction string or should be an unencoded transaction object with signatures/feePayerSignatures. You can pass the returning object from caver.klay.accounts.signTransaction, caver.klay.accounts.feePayerSignTransaction, caver.klay.accounts.getRawTransactionWithSignatures or caver.klay.accounts.combineSignatures.

**Parameters**

| Name                  | Type             | Description                                                                                                                                                                                                                    |
| --------------------- | ---------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| signedTransactionData | String \| Object | An RLP-encoded signed transaction string, an object that has the RLP-encoded signed transaction string in its `rawTransaction` property, or an unencoded transaction object with signatures/feePayerSignatures attached to it. |
| callback              | Function         | (optional) Optional callback, returns an error object as the first parameter and the result as the second.                                                                                                                     |

**Return Value**

| Type       | Description                                                                                   |
| ---------- | --------------------------------------------------------------------------------------------- |
| PromiEvent | A promise combined event emitter. Will be resolved when the transaction receipt is available. |

For PromiEvent, the following events are available:

* `"transactionHash"` returns `String`: Is fired right after the transaction is sent and a transaction hash is available.
* `"receipt"` returns `Object`: Is fired when the transaction receipt is available.
* `"error"` returns `Error`: Is fired if an error occurs during sending. On an out-of-gas error, the second parameter is the receipt.

**Example**

```javascript
// sendSignedTransaction using promise with RLP encoded signed transaction string
caver.klay.sendSignedTransaction('0xf867808505d21dba0083015f9094247f2b7e9a9c51ebcc9449c7d9e7575f9baac36e0180824e43a02e50f5c4d279e17a80c3fe98327de7e48878e9d8141d26759ef64adcf66e6aa0a02ae9e8beac1ba8d5d215d87c33f9e05263b0bad163706c9dd7a563ee1e028f41').then(function(receipt){
    ...
})

// sendSignedTransaction using promise with returning object from caver.klay.accounts.signTransaction
caver.klay.sendSignedTransaction({
    messageHash: '0x2378aeb6439f43597e30df4937f59eb13c98e502bb03babcebb39bf602cd8d73',
    v: '0x4e43',
    r: '0x9fc6cfd3d7c35794ab373c8d7f15746f1f4fa94c80e31270eea31977f20aaa9a',
    s: '0x762343c55f7c1de87e5877887b9d10ed93b16666f4bdbc525aeee1f23fb53457',
    rawTransaction: '0xf867018505d21dba0083015f9094cdba9992ffd79b12ce68905db40bf5e873b1a43e0180824e43a09fc6cfd3d7c35794ab373c8d7f15746f1f4fa94c80e31270eea31977f20aaa9aa0762343c55f7c1de87e5877887b9d10ed93b16666f4bdbc525aeee1f23fb53457',
    txHash: '0x3d598805e1565ba5c4a1d2b708aff9825562d903bef4301ef22564253c6779bf',
    senderTxHash: '0x3d598805e1565ba5c4a1d2b708aff9825562d903bef4301ef22564253c6779bf',
    signatures: [
        '0x4e43',
        '0x9fc6cfd3d7c35794ab373c8d7f15746f1f4fa94c80e31270eea31977f20aaa9a',
        '0x762343c55f7c1de87e5877887b9d10ed93b16666f4bdbc525aeee1f23fb53457',
    ],
}).then(function(receipt){
    ...
})

// sendSignedTransaction using promise with a transaction object that has signatures
caver.klay.sendSignedTransaction({
    type: 'LEGACY',
    from: '0x73647c5fd1a66fac0dbf2af2e5cc7f593a015441',
    to: '0x82c5b8f3ae5c08eeb64a1af0ce89cb5233b05c6c',
    value: '0x1',
    gas: '0x15f90',
    gasPrice: '0x5d21dba00',
    nonce: '0x2',
    signatures: [
        '0x4e43',
        '0x077b0ec1dd5dd66ffbf7d779b08bed6166ec1b0269d85a3901dbfb55331216de',
        '0x23b7565fa994ba3f88290de9b7f6b6b975f2ad9c19ce1ffc4752ecbc51b6c274',
    ],
}).then(function(receipt){
    ...
})

// sendSignedTransaction using promise with a fee delegated transaction object that has signatures and feePayerSignatures
caver.klay.sendSignedTransaction({
    type: 'FEE_DELEGATED_VALUE_TRANSFER',
    from: '0x73647c5fd1a66fac0dbf2af2e5cc7f593a015441',
    to: '0x73f9b11bd22fde3ec543f3fcbdc39fc40a942bf7',
    value: '0x1',
    gas: '0x15f90',
    gasPrice: '0x5d21dba00',
    chainId: '0x2710',
    nonce: '0x3',
    humanReadable: false,
    feePayer: '0xebcd0271c4f8d2a84a33e073a5c9bcdb6bafc556',
    signatures: [
        [
            '0x4e44',
            '0x41dfab76e0fdcdb5c4cd4dbe39861029d8c7f156f9dd10e8292625492943e689',
            '0x789f1bfc42a96366ea0bdc6727410a661fe8300cdf57889316c25aa873a5b85c',
        ],
    ],
    feePayerSignatures: [
        [
            '0x4e44',
            '0x833031cb1d709a408f1c3b83cea88671d9d86f7550101e4e7221507a39dcd462',
            '0x03f1d8003513b038195c6d798623d5bb132a93e7f2f0a2c302079b92858ea8e7',
        ],
    ],
}).then(function(receipt){
    ...
})

// sendSignedTransaction using event emitter with RLP encoded signed transaction string
> caver.klay.sendSignedTransaction('0xf867068505d21dba0083015f90940fd7697a8b9a46b0f770a3986e8a10b6ad6fffe10180824e44a0e591e4cbf4bdada2e559ce5b9c7b604c50d3b1d7d5a29939091bcc8ad4208aa3a01ef917ec539aa79b32a043b452e81840ea012796895cd5925273fd8df139595f')
.on('transactionHash', function(hash){
    ...
})
.on('receipt', function(receipt){
    ...
})
.on('error', console.error)
```

### sendTransaction <a href="#sendtransaction" id="sendtransaction"></a>

* [sendTransaction (Legacy)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_legacy.md#sendtransaction-legacy)
* [sendTransaction (VALUE\_TRANSFER)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_value_transfer.md#sendtransaction-value_transfer)
* [sendTransaction (FEE\_DELEGATED\_VALUE\_TRANSFER)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_value_transfer.md#sendtransaction-fee_delegated_value_transfer)
* [sendTransaction (FEE\_DELEGATED\_VALUE\_TRANSFER\_WITH\_RATIO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_value_transfer.md#sendtransaction-fee_delegated_value_transfer_with_ratio)
* [sendTransaction (VALUE\_TRANSFER\_MEMO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_value_transfer_memo.md#sendtransaction-value_transfer_memo)
* [sendTransaction (FEE\_DELEGATED\_VALUE\_TRANSFER\_MEMO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_value_transfer_memo.md#sendtransaction-fee_delegated_value_transfer_memo)
* [sendTransaction (FEE\_DELEGATED\_VALUE\_TRANSFER\_MEMO\_WITH\_RATIO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_value_transfer_memo.md#sendtransaction-fee_delegated_value_transfer_memo_with_ratio)
* [sendTransaction (ACCOUNT\_UPDATE)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_account_update.md#sendtransaction-account_update)
* [sendTransaction (FEE\_DELEGATED\_ACCOUNT\_UPDATE)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_account_update.md#sendtransaction-fee_delegated_account_update)
* [sendTransaction (FEE\_DELEGATED\_ACCOUNT\_UPDATE\_WITH\_RATIO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_account_update.md#sendtransaction-fee_delegated_account_update_with_ratio)
* [sendTransaction (SMART\_CONTRACT\_DEPLOY)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_smart_contract_deploy.md#sendtransaction-smart_contract_deploy)
* [sendTransaction (FEE\_DELEGATED\_SMART\_CONTRACT\_DEPLOY)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_smart_contract_deploy.md#sendtransaction-fee_delegated_smart_contract_deploy)
* [sendTransaction (FEE\_DELEGATED\_SMART\_CONTRACT\_DEPLOY\_WITH\_RATIO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_smart_contract_deploy.md#sendtransaction-fee_delegated_smart_contract_deploy_with_ratio)
* [sendTransaction (SMART\_CONTRACT\_EXECUTION)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_smart_contract_execution.md#sendtransaction-smart_contract_execution)
* [sendTransaction (FEE\_DELEGATED\_SMART\_CONTRACT\_EXECUTION)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_smart_contract_execution.md#sendtransaction-fee_delegated_smart_contract_execution)
* [sendTransaction (FEE\_DELEGATED\_SMART\_CONTRACT\_EXECUTION\_WITH\_RATIO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_smart_contract_execution.md#sendtransaction-fee_delegated_smart_contract_execution_with_ratio)
* [sendTransaction (CANCEL)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_cancel.md#sendtransaction-cancel)
* [sendTransaction (FEE\_DELEGATED\_CANCEL)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_cancel.md#sendtransaction-fee_delegated_cancel)
* [sendTransaction (FEE\_DELEGATED\_CANCEL\_WITH\_RATIO)](/content/dapp/sdk/caver-js/v1.4.1/api-references/caver.klay/transaction/sendtx_cancel.md#sendtransaction-fee_delegated_cancel_with_ratio)

### signTransaction <a href="#signtransaction" id="signtransaction"></a>

```javascript
caver.klay.signTransaction(transactionObject [, callback])
```

Signs a transaction. This account needs to be unlocked.

**Parameters**

| Name              | Type     | Description                                                                                                |
| ----------------- | -------- | ---------------------------------------------------------------------------------------------------------- |
| transactionObject | Object   | The transaction data to sign.                                                                              |
| callback          | Function | (optional) Optional callback, returns an error object as the first parameter and the result as the second. |

**Return Value**

`Promise` returns `Object` - The RLP encoded transaction. The `raw` property can be used to send the transaction using [caver.klay.sendSignedTransaction](#sendsignedtransaction).

**Example**

```javascript
> caver.klay.signTransaction({
    nonce: 0,
    from: "0xEB014f8c8B418Db6b45774c326A0E64C78914dC0",
    gasPrice: '25000000000',
    gas: "21000",
    to: '0x3535353535353535353535353535353535353535',
    value: "1000000000000000000",
    data: ""
}).then(console.log);

{
    raw: '0xf86c808504a817c800825208943535353535353535353535353535353535353535880de0b6b3a76400008025a04f4c17305743700648bc4f6cd3038ec6f6af0df73e31757007b7f59df7bee88da07e1941b264348e80c78c4027afc65a87b0a5e43e86742b8ca0823584c6788fd0',
    tx: {
        nonce: '0x0',
        gasPrice: '25000000000',
        gas: '0x5208',
        to: '0x3535353535353535353535353535353535353535',
        value: '0xde0b6b3a7640000',
        input: '0x',
        v: '0x25',
        r: '0x4f4c17305743700648bc4f6cd3038ec6f6af0df73e31757007b7f59df7bee88d',
        s: '0x7e1941b264348e80c78c4027afc65a87b0a5e43e86742b8ca0823584c6788fd0',
        hash: '0xda3be87732110de6c1354c83770aae630ede9ac308d9f7b399ecfba23d923384'
    }
}
```


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