2 credits per API call
Create new auction on the auction contract. Before operation, seller must approve spending of the NFT token for the Auction contract using Approve NFT. After auction is created, auction contract transfers the asset to the auction smart contract. Only auction for existing NFTs can be created - seller must be owner of the NFT asset.
This API is supported for the following blockchains:
- BNB Smart Chain
- Celo
- Ethereum
- Harmony
- Klaytn
- Polygon
A known issue on Harmony
On Harmony, when you are viewing a transaction in the Harmony Blockchain Explorer, the transaction status may be displayed as the following:
Error reverted:x0
This is a known issue with the Harmony Blockchain Explorer. This status does not mean that the transaction failed. You can safely ignore it.
Signing a transaction
When selling an asset at the NFT auction, you are charged a fee for the transaction, and you must sign the transaction with the private key of the blockchain address from which the fee will be deducted.
Providing the private key in the API is not a secure way of signing transactions, because the private key can be stolen or exposed. Your private keys should never leave your security perimeter. You should use the private keys only for testing a solution you are building on the testnet of a blockchain.
For signing transactions on the mainnet, we strongly recommend that you use the Tatum Key Management System (KMS) and provide the signature ID instead of the private key in the API. Alternatively, you can use the Tatum JavaScript client.