# KyberStaking
{% hint style="warning" %}
You are referring to the **`Legacy`** version of KyberSwap docs.
For the most updated information, please refer to:
* [**`Classic`**](https://github.com/KyberNetwork/kyberswap-documentation/blob/main/reference/legacy/api-abi/core-smart-contracts/broken-reference/README.md)
* [**`Elastic`**](/reference/legacy/kyberswap-elastic.md)
* [**`Limit Order`**](/kyberswap-solutions/limit-order.md)
* [**`Aggregator`**](/kyberswap-solutions/kyberswap-aggregator.md)
{% endhint %}
## constract KyberStaking
is IERC20, ReentrancyGuard, [IKyberStaking](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-ikyberstaking.md), [IKyberDao](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-ikyberdao.md), [EpochUtils](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-epochutils.md)\ imports [IKyberStaking](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-ikyberstaking.md), [EpochUtils](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-epochutils.md), ReentrancyGuard
*Source*: [KyberStaking.sol](https://github.com/KyberNetwork/smart-contracts/blob/master/contracts/sol6/Dao/KyberStaking.sol)
***
### INDEX[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-kyberstaking#index)
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### REFERENCE[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-kyberstaking#reference)
#### Events[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-kyberstaking#events)
#### `WithdrawDataUpdateFailed`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-kyberstaking#withdrawdataupdatefailed)
Event for logging the failed withdrawal of KNC from the staking contract.
***
event **WithdrawDataUpdateFailed**(uint256 curEpoch, address staker, uint256 amount) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | `curEpoch` | uint256 | current epoch number where KNC was deposited | | `staker` | address | staker's address | | `amount` | uint256 | amount of KNC withdrawn in twei | Signature: 0xa412eef5316d3cbf9e2b4ba3d1cf3e482b40dc8946fd919b7f5053450fa621fb
\\
#### Functions[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-kyberstaking#functions)
#### `delegate`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-kyberstaking#delegate)
Sets the delegation to a representative, and only takes effect on the next epoch
***
function **delegate**(address newRepresentative) external override | Parameter | Type | Description | | --------- |:-----:|:-----------:| | `dAddr` | address | representative's address to delegate to |
\
\### \`deposit\` Deposit and stake KNC. \_\_\_ function \_\_deposit\_\_(uint256 amount) external override | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`amount\` | uint256 | amount of KNC to deposit in twei |\
\### \`withdraw\` Unstakes and withdraws KNC from the staking contract. \_\_\_ function \_\_withdraw\_\_(uint256 amount) external override nonReentrant | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`amount\` | uint256 | amount of KNC to withdraw in twei |\
\### \`getStakerRawData\` Returns the raw staker data up to current epoch + 1. Returns 0 values if staker data is uninitialized. \_\_\_ function \_\_getStakerRawData\_\_(address staker, uint256 epoch) external view override returns (uint256 stake, uint256 delegatedStake, address representative) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | | \`epoch\` | uint256 | epoch number to get staker raw data |
**Returns:**\ stake - total amount of KNC staked in twei delegatedStake - amount of KNC delegated to the staker's address in twei representative - if the staker is delegating, this shows the address he is delegating to
\
\### \`getStake\` Get staked amount up to current epoch + 1. \_\_\_ function \_\_getStake\_\_(address staker, uint256 epoch) external view returns (uint256) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | | \`epoch\` | uint256 | epoch number to get the staked amount | \*\*Returns:\*\*\ Staked amount in KNC token wei at epoch\
\### \`getDelegatedStake\` Get delegated staked amount up to current epoch + 1. \_\_\_ function \_\_getDelegatedStake\_\_(address staker, uint256 epoch) external view returns (uint256) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | | \`epoch\` | uint256 | epoch number to get the delegated staked amount | \*\*Returns:\*\*\ Delegated staked amount in KNC token wei at epoch\
\### \`getRepresentative\` Get representative of a staker up to current epoch + 1. \_\_\_ function \_\_getRepresentative\_\_(address staker, uint256 epoch) external view returns (address) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | | \`epoch\` | uint256 | epoch number to get the representative | \*\*Returns:\*\*\ Representative's address at epoch\
\### \`getStakerData\` Iterates through all the epochs and returns the staker data up to current epoch + 1. \_\_\_ function \_\_getStakerData\_\_(address staker, uint256 epoch) external view override returns (uint256 stake, uint256 delegatedStake, address representative) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | | \`epoch\` | uint256 | epoch number to start iterating from to get staker data | \*\*Returns:\*\*\ stake - total amount of KNC staked in twei delegatedStake - amount of KNC delegated to the staker's address in twei representative - if the staker is delegating, this shows the address he is delegating to\
\### \`getLatestRepresentative\` Get representative of a staker up at the latest epoch. \_\_\_ function \_\_getLatestRepresentative\_\_(address staker) external view returns (address) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | \*\*Returns:\*\*\ Representative at the latest epoch\
\### \`getLatestDelegatedStake\` Get latest delegated staked amount. \_\_\_ function \_\_getLatestDelegatedStake\_\_(address staker) external view returns (uint256) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | \*\*Returns:\*\*\ Delegated staked amount in KNC token wei latest epoch\
\### \`getLatestStakeBalance\` Get staked amount at the latest epoch. \_\_\_ function \_\_getLatestStakeBalance\_\_(address staker) external view returns (uint256) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | \*\*Returns:\*\*\ Staked amount in KNC token wei at latest epoch\
\### \`getLatestStakerData\` Iterates through all the epochs until the latest epoch and returns the staker data. \_\_\_ function \_\_getLatestStakerData\_\_(address staker) external view override returns (uint256 stake, uint256 delegatedStake, address representative) | Parameter | Type | Description | | --------- |:-----:|:-----------:| | \`staker\` | address | staker's address | \*\*Returns:\*\*\ stake - total amount of KNC staked in twei delegatedStake - amount of KNC delegated to the staker's address in twei representative - if the staker is delegating, this shows the address he is delegating to
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