forked from stellar/go
-
Notifications
You must be signed in to change notification settings - Fork 0
/
request_handler_builder.go
106 lines (90 loc) · 2.8 KB
/
request_handler_builder.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
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
package handlers
import (
"encoding/json"
"net/http"
"strconv"
log "github.com/sirupsen/logrus"
b "github.com/stellar/go/build"
"github.com/stellar/go/services/internal/bridge-compliance-shared/http/helpers"
"github.com/stellar/go/services/internal/bridge-compliance-shared/protocols/bridge"
)
// Builder implements /builder endpoint
func (rh *RequestHandler) Builder(w http.ResponseWriter, r *http.Request) {
var request bridge.BuilderRequest
var sequenceNumber uint64
decoder := json.NewDecoder(r.Body)
err := decoder.Decode(&request)
if err != nil {
log.WithFields(log.Fields{"err": err}).Error("Error decoding request")
helpers.Write(w, helpers.NewInvalidParameterError("", "Request body is not a valid JSON"))
return
}
err = request.Process()
if err != nil {
switch err := err.(type) {
case *helpers.ErrorResponse:
helpers.Write(w, err)
default:
log.Error(err)
helpers.Write(w, helpers.InternalServerError)
}
return
}
if err != nil {
switch err := err.(type) {
case *helpers.ErrorResponse:
helpers.Write(w, err)
default:
log.Error(err)
helpers.Write(w, helpers.InternalServerError)
}
return
}
if request.SequenceNumber == "" {
accountResponse, err := rh.Horizon.LoadAccount(request.Source)
if err != nil {
log.WithFields(log.Fields{"err": err}).Error("Error when loading account")
helpers.Write(w, helpers.InternalServerError)
return
}
sequenceNumber, err = strconv.ParseUint(accountResponse.Sequence, 10, 64)
if err == nil {
// increment sequence number when none is provided
sequenceNumber = sequenceNumber + 1
}
} else {
sequenceNumber, err = strconv.ParseUint(request.SequenceNumber, 10, 64)
}
if err != nil {
errorResponse := helpers.NewInvalidParameterError("sequence_number", "Sequence number must be a number")
helpers.Write(w, errorResponse)
return
}
mutators := []b.TransactionMutator{
b.SourceAccount{request.Source},
b.Sequence{sequenceNumber},
b.Network{rh.Config.NetworkPassphrase},
}
for _, operation := range request.Operations {
mutators = append(mutators, operation.Body.ToTransactionMutator())
}
tx, err := b.Transaction(mutators...)
if err != nil {
log.WithFields(log.Fields{"err": err, "request": request}).Error("TransactionBuilder returned error")
helpers.Write(w, helpers.InternalServerError)
return
}
txe, err := tx.Sign(request.Signers...)
if err != nil {
log.WithFields(log.Fields{"err": err, "request": request}).Error("Error signing transaction")
helpers.Write(w, helpers.InternalServerError)
return
}
txeB64, err := txe.Base64()
if err != nil {
log.WithFields(log.Fields{"err": err, "request": request}).Error("Error encoding transaction envelope")
helpers.Write(w, helpers.InternalServerError)
return
}
helpers.Write(w, &bridge.BuilderResponse{TransactionEnvelope: txeB64})
}