mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-25 23:42:23 +00:00
37 lines
1.5 KiB
Go
37 lines
1.5 KiB
Go
package oraclecontract
|
|
|
|
import (
|
|
"github.com/nspcc-dev/neo-go/pkg/interop/native/oracle"
|
|
"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
|
|
"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
|
|
)
|
|
|
|
// Request does an oracle request for the URL specified. It adds minimum
|
|
// response fee which should suffice for small requests. The data from this
|
|
// URL is subsequently processed by OracleCallback function. This request
|
|
// has no JSONPath filters or user data.
|
|
func Request(url string) {
|
|
oracle.Request(url, nil, "oracleCallback", nil, oracle.MinimumResponseGas)
|
|
}
|
|
|
|
// FilteredRequest is similar to Request but allows you to specify JSONPath filter
|
|
// to run against data got from the url specified.
|
|
func FilteredRequest(url string, filter []byte) {
|
|
oracle.Request(url, filter, "oracleCallback", nil, oracle.MinimumResponseGas)
|
|
}
|
|
|
|
// OracleCallback is called by Oracle native contract when request is finished.
|
|
// It either throws an error (if the result is not successful) or logs the data
|
|
// got as a result.
|
|
func OracleCallback(url string, data interface{}, code int, res []byte) {
|
|
// This function shouldn't be called directly, we only expect oracle native
|
|
// contract to be calling it.
|
|
callingHash := runtime.GetCallingScriptHash()
|
|
if !callingHash.Equals(oracle.Hash) {
|
|
panic("not called from oracle contract")
|
|
}
|
|
if code != oracle.Success {
|
|
panic("request failed for " + url + " with code " + std.Itoa(code, 10))
|
|
}
|
|
runtime.Log("result for " + url + ": " + string(res))
|
|
}
|