-
Notifications
You must be signed in to change notification settings - Fork 16
/
runner.go
104 lines (86 loc) · 2.46 KB
/
runner.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
/*
Copyright 2017-2018 OneLedger
*/
package runner
import (
"errors"
"fmt"
"time"
"github.com/Oneledger/protocol/node/action"
"github.com/Oneledger/protocol/node/log"
"github.com/robertkrimen/otto"
)
func (runner Runner) exec(callString string) (string, string) {
if callString == "" {
callString = "default__()"
log.Info("callString is empty, use default", "callString", callString)
}
// Pretext to set up the execution
_, err := runner.vm.Run(`
var contract = new module.Contract(context);
var retValue = contract.` + callString)
if err != nil {
panic(err)
}
sourceCode := getCodeFromJsLibs("onExit")
// Set the transaction parameters
runner.vm.Run(sourceCode)
output := ""
returnValue := ""
if value, err := runner.vm.Get("out"); err == nil {
output, _ = value.ToString()
}
if value, err := runner.vm.Get("ret"); err == nil {
returnValue, _ = value.ToString()
}
return output, returnValue
}
//func (runner Runner) Call(from string, address string, callString string, olt int) (transaction string, returnValue string, err error) {
func (runner Runner) Call(request *action.OLVMRequest, result *action.OLVMResult) (err error) {
log.Debug("Calling the Script")
defer func() {
if r := recover(); r != nil {
log.Debug("HALTING")
err = errors.New(fmt.Sprintf("Runtime Error: %v", r))
result.Out = r.(error).Error()
result.Ret = "HALT"
result.Elapsed = "Timed out after 3 secs"
}
}()
log.Debug("Setup the Context")
runner.initialContext(request.From, request.Value, request.Context)
log.Debug("Setup the SourceCode")
runner.setupContract(request)
done := make(chan string, 1) // The buffer prevents blocking
// Setup a go routine to timeout and interrup processing in otto
runner.vm.Interrupt = make(chan func(), 1) // The buffer prevents blocking
go func() {
for {
select {
case <-time.After(3 * time.Second):
runner.vm.Interrupt <- func() {
log.Debug("Halting due to timeout")
panic(errors.New("Halting Execution"))
}
case status := <-done:
log.Debug("Finished timer Cleanly", "status", status)
return
}
}
}()
log.Debug("Exec the Smart Contract")
start := time.Now()
out, ret := runner.exec(request.CallString)
elapsed := time.Since(start)
done <- "Finished"
log.Debug("Smart Contract is finished")
result.Out = out
result.Ret = ret
result.Elapsed = elapsed.String()
return
}
func CreateRunner() Runner {
vm := otto.New()
vm.Set("version", "OVM v0.1.0 TEST")
return Runner{vm}
}