Welcome to UNOVA API Documentation.
\nUsing this API you can push your data to the blockchain in the form of Assets and Events.
\nBefore you can start interacting with API you need to create an account. An account is a pair: address and secret.Using this key pair, a bearer token can be created to call the API. For more details jump to Authentication - Token section
\nThe API is deployed as a part of the blockchain node, hence the URL changes dynamically in terms of IP address used. While implementing, the user must enter the IP address of the server on which the blockchain node is deployed, in order to successfully send data using the API. The port number remains unchanged. Highlighted in bold, below is the part which the user needs to replace with their own server IP.
\nhttp://35.180.207.79:8070/unova/oauth/token
\nhttp://35.180.207.79:8070/unova/api
\nThis is the unique identifier of each asset in the system. It could be a barcode,GTIN number etc
\nAn asset creation will have either of the three phases
\nIn case of Transformation and Aggregation, it is necessary to establish a link between the assets involved in the action, so as to offer complete traceability. 'Assets Referenced Or Added' help in establishing this link.It refers to the UniqueIDs of the parent asset, or UniqueIDs of assets that went into the formation of the current asset.
\nThis field is not considered during the Commission phase as it is the first occurrence of the asset.
\nThe purpose of the Unova Chain builder is to help you visualize, understand and create the events (or asset creations) that will occur inside your own company. This tool can also be considered as a settings page, that will be used in other aspects of the Unova platform and impact the API. It is thus important you take care when building your chain and be accurate with regard to the settings you select.
\nIn short, the chain builder lets you select and configure asset creations and events in a chronological order to form a chain.
\nOnce you have added an event type (or asset creation type) to your chain, this will also be the place for testing,validating and visualizing the data you are creating (either via the API or via manual form input).
\nResponse consists of following blocks of information
\nThe majority of errors along to the error code provide additional information in body with following format
{
\"reason\": \"What happened\"
}
Note:
All data is immutable, therefore, you will not find update or delete calls.
Hashes are a very important part of proving the persistence and the immutability of the data. All hashes in the are computed using the ethereum standard hashMessage function as described in web3 docs. The underlying hash function is Keccak256.
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\nEvery call to the API needs a bearer token to be passed in the header. The expiry of this token is set to 300 secs by default.
\nNever share your private key with anyone. This is a security risk.
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The API accepts any number of additional fields that the company system might hold, and want to send to the blockchain. Here we use farm as an example and append additional fields with respect to the cow birth event.
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The API accepts form-data hence documents can be easily attached. However, if the asset is already created without attaching any documents, an event needs to be created to attach the said documents.
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Here we use slaughter house as an example, where of a piece of meat (asset) is being created with cow (asset) as the reference (assetsReferencedOrAdded)
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\nAll events must contain the name of the event, uniqueID, location, (street & number, zipcode & city) and any additional data field. Events are always associated with an asset.
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The API accepts any number of additional fields that the company system might hold, and want to send to the blockchain. Here we use farm as an example and append additional fields with respect to the veterinary event.
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