-
Notifications
You must be signed in to change notification settings - Fork 1.7k
/
task.any.go
52 lines (39 loc) · 1.23 KB
/
task.any.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
package pipeline
import (
"context"
"crypto/rand"
"math/big"
"github.com/pkg/errors"
"github.com/smartcontractkit/chainlink/v2/core/logger"
)
// AnyTask picks a value at random from the set of non-errored inputs.
// If there are zero non-errored inputs then it returns an error.
type AnyTask struct {
BaseTask `mapstructure:",squash"`
}
var _ Task = (*AnyTask)(nil)
func (t *AnyTask) Type() TaskType {
return TaskTypeAny
}
func (t *AnyTask) Run(_ context.Context, _ logger.Logger, _ Vars, inputs []Result) (result Result, runInfo RunInfo) {
if len(inputs) == 0 {
return Result{Error: errors.Wrapf(ErrWrongInputCardinality, "AnyTask requires at least 1 input")}, runInfo
}
var answers []interface{}
for _, input := range inputs {
if input.Error != nil {
continue
}
answers = append(answers, input.Value)
}
if len(answers) == 0 {
return Result{Error: errors.Wrapf(ErrBadInput, "There were zero non-errored inputs")}, runInfo
}
nBig, err := rand.Int(rand.Reader, big.NewInt(int64(len(answers))))
if err != nil {
return Result{Error: errors.Wrapf(err, "Failed to generate random number for picking input")}, retryableRunInfo()
}
i := int(nBig.Int64())
answer := answers[i]
return Result{Value: answer}, runInfo
}