/
ethHeaderCidByBlockNumber.go
59 lines (50 loc) · 1.16 KB
/
ethHeaderCidByBlockNumber.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
53
54
55
56
57
58
59
package qlparser
import (
"math/big"
"github.com/valyala/fastjson"
)
// EthHeaderCidByBlockNumberArg detect graphql query `ethHeaderCidByBlockNumber`
func EthHeaderCidByBlockNumberArg(query []byte) (*big.Int, error) {
prm, err := GetParam(query, "ethHeaderCidByBlockNumber", "n")
if err != nil {
return nil, err
}
value, ok := prm.Value.GetValue().(string)
if !ok {
return nil, ErrBadType
}
n, ok := new(big.Int).SetString(value, 10)
if !ok {
return nil, ErrBadType
}
return n, nil
}
// IsHaveEthHeaderCidByBlockNumberData check response is not empty
func IsHaveEthHeaderCidByBlockNumberData(data []byte) (bool, error) {
json, err := fastjson.ParseBytes(data)
if err != nil {
return true, err
}
header := json.Get("data", "ethHeaderCidByBlockNumber")
if header == nil {
return true, nil
}
// can contain nodes or header
var arrValue *fastjson.Value
nodes := header.Get("nodes")
if nodes == nil {
// check edges
edges := header.Get("edges")
if edges == nil {
return true, nil
}
arrValue = edges
} else {
arrValue = nodes
}
aEdges, err := arrValue.Array()
if err != nil {
return true, err
}
return len(aEdges) == 0, nil
}