-
Notifications
You must be signed in to change notification settings - Fork 101
/
handler.go
117 lines (111 loc) · 3.91 KB
/
handler.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
107
108
109
110
111
112
113
114
115
116
117
package pocketcore
import (
"fmt"
"github.com/pokt-network/pocket-core/crypto"
sdk "github.com/pokt-network/pocket-core/types"
"github.com/pokt-network/pocket-core/x/pocketcore/keeper"
"github.com/pokt-network/pocket-core/x/pocketcore/types"
"reflect"
"time"
)
// "NewHandler" - Returns a handler for "pocketCore" type messages.
func NewHandler(keeper keeper.Keeper) sdk.Handler {
return func(ctx sdk.Ctx, msg sdk.Msg, _ crypto.PublicKey) sdk.Result {
if ctx.IsAfterUpgradeHeight() {
ctx = ctx.WithEventManager(sdk.NewEventManager())
}
// convert to value for switch consistency
if reflect.ValueOf(msg).Kind() == reflect.Ptr {
msg = reflect.Indirect(reflect.ValueOf(msg)).Interface().(sdk.Msg)
}
switch msg := msg.(type) {
// handle claim message
case types.MsgClaim:
return handleClaimMsg(ctx, keeper, msg)
// handle legacy proof message
case types.MsgProof:
return handleProofMsg(ctx, keeper, msg)
default:
errMsg := fmt.Sprintf("Unrecognized pocketcore ProtoMsg type: %v", msg.Type())
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
// "handleClaimMsg" - General handler for the claim message
func handleClaimMsg(ctx sdk.Ctx, k keeper.Keeper, msg types.MsgClaim) sdk.Result {
defer sdk.TimeTrack(time.Now())
// validate the claim message
if err := k.ValidateClaim(ctx, msg); err != nil {
return err.Result()
}
// set the claim in the world state
err := k.SetClaim(ctx, msg)
if err != nil {
return sdk.ErrInternal(err.Error()).Result()
}
// create the event
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(
types.EventTypeClaim,
sdk.NewAttribute(types.AttributeKeyValidator, msg.FromAddress.String()),
),
})
return sdk.Result{Events: ctx.EventManager().Events()}
}
// "handleProofMsg" - General handler for the proof message
func handleProofMsg(ctx sdk.Ctx, k keeper.Keeper, proof types.MsgProof) sdk.Result {
defer sdk.TimeTrack(time.Now())
// validate the claim claim
addr, claim, err := k.ValidateProof(ctx, proof)
if err != nil {
if err.Code() == types.CodeInvalidMerkleVerifyError && !claim.IsEmpty() {
// delete local evidence
processSelf(ctx, proof.GetSigners()[0], claim.SessionHeader, claim.EvidenceType, sdk.ZeroInt())
return err.Result()
}
if err.Code() == types.CodeReplayAttackError && !claim.IsEmpty() {
// delete local evidence
processSelf(ctx, proof.GetSigners()[0], claim.SessionHeader, claim.EvidenceType, sdk.ZeroInt())
// if is a replay attack, handle accordingly
k.HandleReplayAttack(ctx, addr, sdk.NewInt(claim.TotalProofs))
err := k.DeleteClaim(ctx, addr, claim.SessionHeader, claim.EvidenceType)
if err != nil {
ctx.Logger().Error("Could not delete claim from world state after replay attack detected", "Address", claim.FromAddress)
}
}
return err.Result()
}
// valid claim message so execute according to type
tokens, err := k.ExecuteProof(ctx, proof, claim)
if err != nil {
return err.Result()
}
// delete local evidence
processSelf(ctx, proof.GetSigners()[0], claim.SessionHeader, claim.EvidenceType, tokens)
// create the event
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(
types.EventTypeProof,
sdk.NewAttribute(types.AttributeKeyValidator, addr.String()),
),
})
return sdk.Result{Events: ctx.EventManager().Events()}
}
func processSelf(ctx sdk.Ctx, signer sdk.Address, header types.SessionHeader, evidenceType types.EvidenceType, tokens sdk.BigInt) {
node, ok := types.GlobalPocketNodes[signer.String()]
if !ok {
return
}
evidenceStore := node.EvidenceStore
err := types.DeleteEvidence(header, evidenceType, evidenceStore)
if err != nil {
ctx.Logger().Error("Unable to delete evidence: " + err.Error())
}
if !tokens.IsZero() {
if types.GlobalPocketConfig.LeanPocket {
go types.GlobalServiceMetric().AddUPOKTEarnedFor(header.Chain, float64(tokens.Int64()), &signer)
} else {
types.GlobalServiceMetric().AddUPOKTEarnedFor(header.Chain, float64(tokens.Int64()), &signer)
}
}
}