2021-04-07 18:27:42 +00:00
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# NeoGo Oracle service
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NeoGo node can act as oracle service node for https and neofs protocols. It
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has to have a wallet with key belonging to one of network's designated oracle
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nodes (stored in `RoleManagement` native contract).
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It needs [RPC service](rpc.md) to be enabled and configured properly because
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RPC is used by oracle nodes to exchange signatures of the resulting
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transaction.
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## Configuration
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To enable oracle service add `Oracle` subsection to `ApplicationConfiguration`
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section of your node config.
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Parameters:
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* `Enabled`: boolean value, enables/disables the service, `true` for service
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to be enabled
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* `AllowPrivateHost`: boolean value, enables/disables private IPs (like
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127.0.0.1 or 192.168.0.1) for https requests, it defaults to false and it's
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false on public networks, but you can enable it for private ones.
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* `Nodes`: list of oracle node RPC endpoints, it's used for oracle node
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communication. All oracle nodes should be specified there.
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* `NeoFS`: a subsection of its own for NeoFS configuration with two
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parameters:
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- `Timeout`: request timeout, like "5s"
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- `Nodes`: list of NeoFS nodes (their gRPC interfaces) to get data from,
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one node is enough to operate, but they're used in round-robin fashion,
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so you can spread the load by specifying multiple nodes
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* `MaxTaskTimeout`: maximum time a request can be active (retried to
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process), defaults to 1 hour if not specified.
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* `RefreshInterval`: retry period for requests that aren't yet processed,
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defaults to 3 minutes.
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* `MaxConcurrentRequests`: maximum number of requests processed in parallel,
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defaults to 10.
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* `RequestTimeout`: https request timeout, default is 5 seconds.
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* `ResponseTimeout`: RPC communication timeout for inter-oracle exchange,
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default is 4 seconds.
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* `UnlockWallet`: oracle wallet configuration:
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- `Path`: path to NEP-6 wallet.
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- `Password`: password for the account to be used by oracle node.
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### Example
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```
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Oracle:
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Enabled: true
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AllowPrivateHost: false
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2021-04-08 10:00:33 +00:00
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MaxTaskTimeout: 432000000s
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2021-04-07 18:27:42 +00:00
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Nodes:
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- http://oracle1.example.com:20332
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- http://oracle2.example.com:20332
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- http://oracle3.example.com:20332
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- http://oracle4.example.com:20332
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NeoFS:
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Nodes:
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- st1.storage.fs.neo.org:8080
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- st2.storage.fs.neo.org:8080
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- st3.storage.fs.neo.org:8080
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- st4.storage.fs.neo.org:8080
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UnlockWallet:
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Path: "/path/to/oracle-wallet.json"
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Password: "dontworryaboutthevase"
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```
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## Operation
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To run oracle service on your network you need to:
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* set oracle node keys in `RoleManagement` contract
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* configure and run appropriate number of oracle nodes with keys specified in
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`RoleManagement` contract
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