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developers/asset-pricing.md
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@ -21,6 +21,53 @@ This datatoken represents the access right to your data, so buyers don't have to
The fixed pricing model relies on the [createNftWithErc20WithFixedRate](https://github.com/oceanprotocol/contracts/blob/main/contracts/ERC721Factory.sol#LL674C14-L674C45) in our smart contract, which securely stores the pricing information for assets published using this model.
<details>
<summary>Create NFT with Fixed Rate Pricing</summary>
```javascript
/**
* @dev createNftWithErc20WithFixedRate
* Creates a new NFT, then a ERC20, then a FixedRateExchange, all in one call
* Use this carefully, because if Fixed Rate creation fails, you are still going to pay a lot of gas
* @param _NftCreateData input data for NFT Creation
* @param _ErcCreateData input data for ERC20 Creation
* @param _FixedData input data for FixedRate Creation
*/
function createNftWithErc20WithFixedRate(
NftCreateData calldata _NftCreateData,
ErcCreateData calldata _ErcCreateData,
FixedData calldata _FixedData
) external nonReentrant returns (address erc721Address, address erc20Address, bytes32 exchangeId){
//we are adding ourselfs as a ERC20 Deployer, because we need it in order to deploy the fixedrate
erc721Address = deployERC721Contract(
_NftCreateData.name,
_NftCreateData.symbol,
_NftCreateData.templateIndex,
address(this),
address(0),
_NftCreateData.tokenURI,
_NftCreateData.transferable,
_NftCreateData.owner);
erc20Address = IERC721Template(erc721Address).createERC20(
_ErcCreateData.templateIndex,
_ErcCreateData.strings,
_ErcCreateData.addresses,
_ErcCreateData.uints,
_ErcCreateData.bytess
);
exchangeId = IERC20Template(erc20Address).createFixedRate(
_FixedData.fixedPriceAddress,
_FixedData.addresses,
_FixedData.uints
);
// remove our selfs from the erc20DeployerRole
IERC721Template(erc721Address).removeFromCreateERC20List(address(this));
}
```
</details>
{% hint style="info" %}
There are two templates available: [ERC20Template](contracts/datatoken-templates.md#regular-template) and [ERC20TemplateEnterprise](contracts/datatoken-templates.md#enterprise-template).
@ -39,7 +86,54 @@ In this model, datatokens are allocated to a dispenser smart contract, which dis
The fixed pricing model relies on the [createNftWithErc20WithDispenser](https://github.com/oceanprotocol/contracts/blob/main/contracts/ERC721Factory.sol#LL713C14-L713C45) in our smart contract, which securely stores the pricing information for assets published using this model.
<details>
<summary>Create NFT with Free Pricing</summary>
```javascript
/**
* @dev createNftWithErc20WithDispenser
* Creates a new NFT, then a ERC20, then a Dispenser, all in one call
* Use this carefully
* @param _NftCreateData input data for NFT Creation
* @param _ErcCreateData input data for ERC20 Creation
* @param _DispenserData input data for Dispenser Creation
*/
function createNftWithErc20WithDispenser(
NftCreateData calldata _NftCreateData,
ErcCreateData calldata _ErcCreateData,
DispenserData calldata _DispenserData
) external nonReentrant returns (address erc721Address, address erc20Address){
//we are adding ourselfs as a ERC20 Deployer, because we need it in order to deploy the fixedrate
erc721Address = deployERC721Contract(
_NftCreateData.name,
_NftCreateData.symbol,
_NftCreateData.templateIndex,
address(this),
address(0),
_NftCreateData.tokenURI,
_NftCreateData.transferable,
_NftCreateData.owner);
erc20Address = IERC721Template(erc721Address).createERC20(
_ErcCreateData.templateIndex,
_ErcCreateData.strings,
_ErcCreateData.addresses,
_ErcCreateData.uints,
_ErcCreateData.bytess
);
IERC20Template(erc20Address).createDispenser(
_DispenserData.dispenserAddress,
_DispenserData.maxTokens,
_DispenserData.maxBalance,
_DispenserData.withMint,
_DispenserData.allowedSwapper
);
// remove our selfs from the erc20DeployerRole
IERC721Template(erc721Address).removeFromCreateERC20List(address(this));
}
```
</details>
To make the most of these pricing models, you can rely on user-friendly libraries such as [Ocean.js ](ocean.js/)and [Ocean.py](ocean.py/), specifically developed for interacting with Ocean Protocol. With Ocean.js, you can use the [createFRE() ](ocean.js/publish.md)function to effortlessly deploy a data NFT (non-fungible token) and datatoken with a fixed-rate exchange pricing model. Similarly, in Ocean.py, the [create\_url\_asset()](ocean.py/publish-flow.md#create-an-asset-and-pricing-schema-simultaneously) function allows you to create an asset with fixed pricing. These libraries simplify the process of interacting with Ocean Protocol, managing pricing, and handling asset creation.