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37 lines
1.4 KiB
Go
37 lines
1.4 KiB
Go
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package oraclecontract
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop/native/oracle"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
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"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
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)
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// Request does an oracle request for the URL specified. It adds minimum
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// response fee which should suffice for small requests. The data from this
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// URL is subsequently processed by OracleCallback function. This request
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// has no JSONPath filters or user data.
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func Request(url string) {
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oracle.Request(url, nil, "oracleCallback", nil, oracle.MinimumResponseGas)
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}
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// FilteredRequest is similar to Request but allows you to specify JSONPath filter
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// to run against data got from the url specified.
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func FilteredRequest(url string, filter []byte) {
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oracle.Request(url, filter, "oracleCallback", nil, oracle.MinimumResponseGas)
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}
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// OracleCallback is called by Oracle native contract when request is finished.
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// It either throws an error (if the result is not successful) or logs the data
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// got as a result.
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func OracleCallback(url string, data interface{}, code int, res []byte) {
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// This function shouldn't be called directly, we only expect oracle native
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// contract to be calling it.
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if string(runtime.GetCallingScriptHash()) != oracle.Hash {
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panic("not called from oracle contract")
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}
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if code != oracle.Success {
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panic("request failed for " + url + " with code " + std.Itoa(code, 10))
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}
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runtime.Log("result for " + url + ": " + string(res))
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}
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