---
title: CreateAuctionKMS
parent: Model
layout: page
---
# CreateAuctionKMS
## Model getters
Method name | Return type | Description | Notes
------------ | ------------- | ------------- | -------------
**getChain()** | **string** | Blockchain to work with.
Example: `ETH` |
**getContractAddress()** | **string** | Address of the auction smart contract.
Example: `0x687422eEA2cB73B5d3e242bA5456b782919AFc85` |
**getNftAddress()** | **string** | Address of the NFT asset to sell smart contract.
Example: `0x687422eEA2cB73B5d3e242bA5456b782919AFc85` |
**getSeller()** | **string** | Address of the seller of the NFT asset.
Example: `0x687422eEA2cB73B5d3e242bA5456b782919AFc85` |
**getErc20Address()** | **string** | Optional address of the ERC20 token, which will be used as a selling currency of the NFT.
Example: `0x687422eEA2cB73B5d3e242bA5456b782919AFc85` | [optional]
**getId()** | **string** | ID of the auction. It's up to the developer to generate unique ID
Example: `null` |
**getAmount()** | **string** | Amount of the assets to be sent. For ERC-721 tokens, enter 1.
Example: `1` | [optional]
**getTokenId()** | **string** | ID of token, if transaction is for ERC-721 or ERC-1155.
Example: `100000` |
**getEndedAt()** | **float** | Last block, where auction accepts bids.
Example: `100000` |
**getIsErc721()** | **bool** | True if asset is NFT of type ERC721, false if ERC1155.
Example: `true` |
**getSignatureId()** | **string** | Identifier of the private key associated in signing application. Private key, or signature Id must be present.
Example: `26d3883e-4e17-48b3-a0ee-09a3e484ac83` |
**getIndex()** | **float** | If signatureId is mnemonic-based, this is the index to the specific address from that mnemonic.
Example: `null` | [optional]
**getNonce()** | **float** | The nonce to be set to the transaction; if not present, the last known nonce will be used
Example: `1` | [optional]
**getFee()** | [**\Tatum\Model\DeployErc20Fee**](../DeployErc20Fee) |
Example: `null` | [optional]