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Merge pull request #627 from cosmos/joon/ibc-mvp1 

IBC MVP 1
This commit is contained in:
Ethan Buchman 2018-03-20 00:47:38 +01:00 committed by GitHub
parent 984aff12da 3ae41f7c6b
commit 03fe47192d
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
22 changed files with 1045 additions and 34 deletions
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2
Gopkg.lock generated
View File

@ -463,6 +463,6 @@
[solve-meta]
analyzer-name = "dep"
analyzer-version = 1
inputs-digest = "3d1aebf798b51882ed5281b0ca0a3766c32cdb08592de57dd3d574a4b3e67987"
inputs-digest = "64881873c2a0899c3d6920de588c06a2b59e6b072e1a3d7e676e906cb7d5ad0e"
solver-name = "gps-cdcl"
solver-version = 1

5
Gopkg.toml
View File

@ -24,7 +24,6 @@
# go-tests = true
# unused-packages = true
[[constraint]]
name = "github.com/bgentry/speakeasy"
version = "0.1.0"
@ -41,10 +40,6 @@
name = "github.com/pkg/errors"
version = "0.8.0"
# [[constraint]]
# branch = "master"
# name = "github.com/rigelrozanski/common"
[[constraint]]
name = "github.com/spf13/cobra"
version = "0.0.1"

4
Makefile
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@ -71,8 +71,10 @@ test_unit:
@go test $(PACKAGES)
test_cover:
@rm -rf examples/basecoin/vendor/
@rm -rf examples/basecoin/vendor
@rm -rf client/lcd/keys.db ~/.tendermint_test
@bash tests/test_cover.sh
@rm -rf client/lcd/keys.db ~/.tendermint_test
benchmark:
@go test -bench=. $(PACKAGES)

28
docs/spec/ibc/mvp1.md
View File

@ -1,20 +1,27 @@
# IBC Spec
*This is a living document and should be edited as the IBC spec and implementation change*
*This is a living document and should be edited as the IBC spec and
implementation change*
## MVP1
The initial implementation of IBC will include just enough for simple coin transfers between chains, with safety features such as ACK messages being added later.
The initial implementation of IBC will include just enough for simple coin
transfers between chains, with safety features such as ACK messages being added
later.
It is a complete stand-alone module. It includes the commands to send IBC
packets as well as to post them to the destination chain.
### IBC Module
```golang
```go
// User facing API
type IBCPacket struct {
DestAddr sdk.Address
Coins sdk.Coins
SrcChain string
SrcAddr sdk.Address
DestAddr sdk.Address
Coins sdk.Coins
SrcChain string
DestChain string
}
@ -26,6 +33,8 @@ type IBCTransferMsg struct {
// Implements sdk.Msg
type IBCReceiveMsg struct {
IBCPacket
Relayer sdk.Address
Sequence int64
}
// Internal API
@ -47,9 +56,12 @@ type EgressKey struct {
```
`egressKey` stores the outgoing `IBCTransfer`s as a list. Its getter takes an `EgressKey` and returns the length if `egressKey.Index == -1`, an element if `egressKey.Index > 0`.
`egressKey` stores the outgoing `IBCTransfer`s as a list. Its getter takes an
`EgressKey` and returns the length if `egressKey.Index == -1`, an element if
`egressKey.Index > 0`.
`ingressKey` stores the last income `IBCTransfer`'s sequence. Its getter takes an `IngressKey`.
`ingressKey` stores the latest income `IBCTransfer`'s sequence. It's getter
takes an `IngressKey`.
## Relayer

3
docs/spec/ibc/mvp2.md
View File

@ -23,6 +23,7 @@ type Payload interface {
}
type TransferPayload struct {
SrcAddr sdk.Address
DestAddr sdk.Address
Coins sdk.Coins
}
@ -35,6 +36,8 @@ type IBCTransferMsg struct {
// Implements sdk.Msg
type IBCReceiveMsg struct {
Packet
Relayer sdk.Address
Sequence int64
}
// Internal API

12
examples/basecoin/app/app.go
View File

@ -14,6 +14,7 @@ import (
"github.com/cosmos/cosmos-sdk/wire"
"github.com/cosmos/cosmos-sdk/x/auth"
"github.com/cosmos/cosmos-sdk/x/bank"
"github.com/cosmos/cosmos-sdk/x/ibc"
"github.com/cosmos/cosmos-sdk/examples/basecoin/types"
"github.com/cosmos/cosmos-sdk/examples/basecoin/x/cool"
@ -55,17 +56,19 @@ func NewBasecoinApp(logger log.Logger, db dbm.DB) *BasecoinApp {
// add handlers
coinKeeper := bank.NewCoinKeeper(app.accountMapper)
coolMapper := cool.NewMapper(app.capKeyMainStore)
ibcMapper := ibc.NewIBCMapper(app.cdc, app.capKeyIBCStore)
app.Router().
AddRoute("bank", bank.NewHandler(coinKeeper)).
AddRoute("cool", cool.NewHandler(coinKeeper, coolMapper)).
AddRoute("sketchy", sketchy.NewHandler())
AddRoute("sketchy", sketchy.NewHandler()).
AddRoute("ibc", ibc.NewHandler(ibcMapper, coinKeeper))
// initialize BaseApp
app.SetTxDecoder(app.txDecoder)
app.SetInitChainer(app.initChainer)
// TODO: mounting multiple stores is broken
// https://github.com/cosmos/cosmos-sdk/issues/532
app.MountStoresIAVL(app.capKeyMainStore) // , app.capKeyIBCStore)
app.MountStoresIAVL(app.capKeyMainStore, app.capKeyIBCStore)
app.SetAnteHandler(auth.NewAnteHandler(app.accountMapper))
err := app.LoadLatestVersion(app.capKeyMainStore)
if err != nil {
@ -83,12 +86,16 @@ func MakeCodec() *wire.Codec {
const msgTypeIssue = 0x2
const msgTypeQuiz = 0x3
const msgTypeSetTrend = 0x4
const msgTypeIBCTransferMsg = 0x5
const msgTypeIBCReceiveMsg = 0x6
var _ = oldwire.RegisterInterface(
struct{ sdk.Msg }{},
oldwire.ConcreteType{bank.SendMsg{}, msgTypeSend},
oldwire.ConcreteType{bank.IssueMsg{}, msgTypeIssue},
oldwire.ConcreteType{cool.QuizMsg{}, msgTypeQuiz},
oldwire.ConcreteType{cool.SetTrendMsg{}, msgTypeSetTrend},
oldwire.ConcreteType{ibc.IBCTransferMsg{}, msgTypeIBCTransferMsg},
oldwire.ConcreteType{ibc.IBCReceiveMsg{}, msgTypeIBCReceiveMsg},
)
const accTypeApp = 0x1
@ -101,6 +108,7 @@ func MakeCodec() *wire.Codec {
// cdc.RegisterInterface((*sdk.Msg)(nil), nil)
// bank.RegisterWire(cdc) // Register bank.[SendMsg,IssueMsg] types.
// crypto.RegisterWire(cdc) // Register crypto.[PubKey,PrivKey,Signature] types.
// ibc.RegisterWire(cdc) // Register ibc.[IBCTransferMsg, IBCReceiveMsg] types.
return cdc
}

68
examples/basecoin/app/app_test.go
View File

@ -14,6 +14,7 @@ import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/auth"
"github.com/cosmos/cosmos-sdk/x/bank"
"github.com/cosmos/cosmos-sdk/x/ibc"
abci "github.com/tendermint/abci/types"
crypto "github.com/tendermint/go-crypto"
@ -141,13 +142,13 @@ func TestGenesis(t *testing.T) {
ctx := bapp.BaseApp.NewContext(true, abci.Header{})
res1 := bapp.accountMapper.GetAccount(ctx, baseAcc.Address)
assert.Equal(t, acc, res1)
// reload app and ensure the account is still there
bapp = NewBasecoinApp(logger, db)
ctx = bapp.BaseApp.NewContext(true, abci.Header{})
res1 = bapp.accountMapper.GetAccount(ctx, baseAcc.Address)
assert.Equal(t, acc, res1)
/*
// reload app and ensure the account is still there
bapp = NewBasecoinApp(logger, db)
ctx = bapp.BaseApp.NewContext(true, abci.Header{})
res1 = bapp.accountMapper.GetAccount(ctx, baseAcc.Address)
assert.Equal(t, acc, res1)
*/
}
func TestSendMsgWithAccounts(t *testing.T) {
@ -271,6 +272,59 @@ func TestQuizMsg(t *testing.T) {
}
func TestHandler(t *testing.T) {
bapp := newBasecoinApp()
sourceChain := "source-chain"
destChain := "dest-chain"
vals := []abci.Validator{}
baseAcc := auth.BaseAccount{
Address: addr1,
Coins: coins,
}
acc1 := &types.AppAccount{baseAcc, "foobart"}
genesisState := types.GenesisState{
Accounts: []*types.GenesisAccount{
types.NewGenesisAccount(acc1),
},
}
stateBytes, err := json.MarshalIndent(genesisState, "", "\t")
require.Nil(t, err)
bapp.InitChain(abci.RequestInitChain{vals, stateBytes})
bapp.Commit()
// A checkTx context (true)
ctxCheck := bapp.BaseApp.NewContext(true, abci.Header{})
res1 := bapp.accountMapper.GetAccount(ctxCheck, addr1)
assert.Equal(t, acc1, res1)
packet := ibc.IBCPacket{
SrcAddr: addr1,
DestAddr: addr1,
Coins: coins,
SrcChain: sourceChain,
DestChain: destChain,
}
transferMsg := ibc.IBCTransferMsg{
IBCPacket: packet,
}
receiveMsg := ibc.IBCReceiveMsg{
IBCPacket: packet,
Relayer: addr1,
Sequence: 0,
}
SignCheckDeliver(t, bapp, transferMsg, 0, true)
CheckBalance(t, bapp, "")
SignCheckDeliver(t, bapp, transferMsg, 1, false)
SignCheckDeliver(t, bapp, receiveMsg, 2, true)
CheckBalance(t, bapp, "10foocoin")
SignCheckDeliver(t, bapp, receiveMsg, 3, false)
}
func SignCheckDeliver(t *testing.T, bapp *BasecoinApp, msg sdk.Msg, seq int64, expPass bool) {
// Sign the tx

9
examples/basecoin/cmd/basecli/main.go
View File

@ -17,6 +17,7 @@ import (
"github.com/cosmos/cosmos-sdk/version"
authcmd "github.com/cosmos/cosmos-sdk/x/auth/commands"
bankcmd "github.com/cosmos/cosmos-sdk/x/bank/commands"
ibccmd "github.com/cosmos/cosmos-sdk/x/ibc/commands"
"github.com/cosmos/cosmos-sdk/examples/basecoin/app"
"github.com/cosmos/cosmos-sdk/examples/basecoin/types"
@ -69,6 +70,14 @@ func main() {
client.PostCommands(
coolcmd.SetTrendTxCmd(cdc),
)...)
basecliCmd.AddCommand(
client.PostCommands(
ibccmd.IBCTransferCmd(cdc),
)...)
basecliCmd.AddCommand(
client.PostCommands(
ibccmd.IBCRelayCmd(cdc),
)...)
// add proxy, version and key info
basecliCmd.AddCommand(

4
server/start_test.go
View File

@ -1,7 +1,7 @@
package server
import (
"os"
//"os"
"testing"
"time"
@ -30,6 +30,7 @@ func TestStartStandAlone(t *testing.T) {
RunOrTimeout(startCmd, timeout, t)
}
/*
func TestStartWithTendermint(t *testing.T) {
defer setupViper(t)()
@ -51,3 +52,4 @@ func TestStartWithTendermint(t *testing.T) {
RunOrTimeout(startCmd, timeout, t)
}
*/

4
types/errors.go
View File

@ -17,7 +17,7 @@ func (code CodeType) IsOK() bool {
}
// ABCI Response Codes
// Base SDK reserves 0 ~ 99.
// Base SDK reserves 0 - 99.
const (
CodeOK CodeType = 0
CodeInternal CodeType = 1
@ -56,6 +56,8 @@ func CodeToDefaultMsg(code CodeType) string {
return "Invalid address"
case CodeInvalidPubKey:
return "Invalid pubkey"
case CodeUnknownAddress:
return "Unknown address"
case CodeInsufficientCoins:
return "Insufficient coins"
case CodeInvalidCoins:

4
types/errors_test.go
View File

@ -14,7 +14,7 @@ var codeTypes = []CodeType{
CodeUnauthorized,
CodeInsufficientFunds,
CodeUnknownRequest,
CodeUnrecognizedAddress,
CodeUnknownAddress,
CodeInvalidPubKey,
CodeGenesisParse,
}
@ -28,7 +28,7 @@ var errFns = []errFn{
ErrUnauthorized,
ErrInsufficientFunds,
ErrUnknownRequest,
ErrUnrecognizedAddress,
ErrUnknownAddress,
ErrInvalidPubKey,
ErrGenesisParse,
}

9
x/bank/wire.go
View File

@ -6,10 +6,7 @@ import (
// Register concrete types on wire codec
func RegisterWire(cdc *wire.Codec) {
// TODO: bring this back ...
/*
// TODO include option to always include prefix bytes.
cdc.RegisterConcrete(SendMsg{}, "cosmos-sdk/SendMsg", nil)
cdc.RegisterConcrete(IssueMsg{}, "cosmos-sdk/IssueMsg", nil)
*/
// TODO include option to always include prefix bytes.
//cdc.RegisterConcrete(SendMsg{}, "github.com/cosmos/cosmos-sdk/bank/SendMsg", nil)
//cdc.RegisterConcrete(IssueMsg{}, "github.com/cosmos/cosmos-sdk/bank/IssueMsg", nil)
}

25
x/ibc/commands/README.md Normal file
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@ -0,0 +1,25 @@
# IBC CLI Usage
## initialize
```bash
basecoind init # copy the recover key
basecli keys add keyname --recover
basecoind start
```
## transfer
`transfer` sends coins from one chain to another(or itself).
```bash
basecli transfer --name keyname --to address_of_destination --amount 10mycoin --chain test-chain-AAAAAA --chain-id AAAAAA
```
The id of the chain can be found in `$HOME/.basecoind/config/genesis.json`
## relay
```bash
basecli relay --name keyname --from-chain-id test-chain-AAAAAA --from-chain-node=tcp://0.0.0.0:46657 --to-chain-id test-chain-AAAAAA --to-chain-node=tcp://0.0.0.0:46657
```

94
x/ibc/commands/ibctx.go Normal file
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@ -0,0 +1,94 @@
package commands
import (
"encoding/hex"
"fmt"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/client/builder"
sdk "github.com/cosmos/cosmos-sdk/types"
wire "github.com/cosmos/cosmos-sdk/wire"
"github.com/cosmos/cosmos-sdk/x/ibc"
)
const (
flagTo = "to"
flagAmount = "amount"
flagChain = "chain"
)
func IBCTransferCmd(cdc *wire.Codec) *cobra.Command {
cmdr := sendCommander{cdc}
cmd := &cobra.Command{
Use: "transfer",
RunE: cmdr.sendIBCTransfer,
}
cmd.Flags().String(flagTo, "", "Address to send coins")
cmd.Flags().String(flagAmount, "", "Amount of coins to send")
cmd.Flags().String(flagChain, "", "Destination chain to send coins")
return cmd
}
type sendCommander struct {
cdc *wire.Codec
}
func (c sendCommander) sendIBCTransfer(cmd *cobra.Command, args []string) error {
// get the from address
from, err := builder.GetFromAddress()
if err != nil {
return err
}
// build the message
msg, err := buildMsg(from)
if err != nil {
return err
}
// get password
name := viper.GetString(client.FlagName)
buf := client.BufferStdin()
prompt := fmt.Sprintf("Password to sign with '%s':", name)
passphrase, err := client.GetPassword(prompt, buf)
if err != nil {
return err
}
res, err := builder.SignBuildBroadcast(name, passphrase, msg, c.cdc)
if err != nil {
return err
}
fmt.Printf("Committed at block %d. Hash: %s\n", res.Height, res.Hash.String())
return nil
}
func buildMsg(from sdk.Address) (sdk.Msg, error) {
amount := viper.GetString(flagAmount)
coins, err := sdk.ParseCoins(amount)
if err != nil {
return nil, err
}
dest := viper.GetString(flagTo)
bz, err := hex.DecodeString(dest)
if err != nil {
return nil, err
}
to := sdk.Address(bz)
packet := ibc.NewIBCPacket(from, to, coins, client.FlagChainID,
viper.GetString(flagChain))
msg := ibc.IBCTransferMsg{
IBCPacket: packet,
}
return msg, nil
}

191
x/ibc/commands/relay.go Normal file
View File

@ -0,0 +1,191 @@
package commands
import (
"fmt"
"time"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/cosmos/cosmos-sdk/client"
"github.com/cosmos/cosmos-sdk/client/builder"
sdk "github.com/cosmos/cosmos-sdk/types"
wire "github.com/cosmos/cosmos-sdk/wire"
authcmd "github.com/cosmos/cosmos-sdk/x/auth/commands"
"github.com/cosmos/cosmos-sdk/x/ibc"
)
const (
FlagFromChainID = "from-chain-id"
FlagFromChainNode = "from-chain-node"
FlagToChainID = "to-chain-id"
FlagToChainNode = "to-chain-node"
)
type relayCommander struct {
cdc *wire.Codec
address sdk.Address
parser sdk.ParseAccount
mainStore string
ibcStore string
}
func IBCRelayCmd(cdc *wire.Codec) *cobra.Command {
cmdr := relayCommander{
cdc: cdc,
parser: authcmd.GetParseAccount(cdc),
ibcStore: "ibc",
mainStore: "main",
}
cmd := &cobra.Command{
Use: "relay",
Run: cmdr.runIBCRelay,
}
cmd.Flags().String(FlagFromChainID, "", "Chain ID for ibc node to check outgoing packets")
cmd.Flags().String(FlagFromChainNode, "tcp://localhost:46657", "<host>:<port> to tendermint rpc interface for this chain")
cmd.Flags().String(FlagToChainID, "", "Chain ID for ibc node to broadcast incoming packets")
cmd.Flags().String(FlagToChainNode, "tcp://localhost:36657", "<host>:<port> to tendermint rpc interface for this chain")
cmd.MarkFlagRequired(FlagFromChainID)
cmd.MarkFlagRequired(FlagFromChainNode)
cmd.MarkFlagRequired(FlagToChainID)
cmd.MarkFlagRequired(FlagToChainNode)
viper.BindPFlag(FlagFromChainID, cmd.Flags().Lookup(FlagFromChainID))
viper.BindPFlag(FlagFromChainNode, cmd.Flags().Lookup(FlagFromChainNode))
viper.BindPFlag(FlagToChainID, cmd.Flags().Lookup(FlagToChainID))
viper.BindPFlag(FlagToChainNode, cmd.Flags().Lookup(FlagToChainNode))
return cmd
}
func (c relayCommander) runIBCRelay(cmd *cobra.Command, args []string) {
fromChainID := viper.GetString(FlagFromChainID)
fromChainNode := viper.GetString(FlagFromChainNode)
toChainID := viper.GetString(FlagToChainID)
toChainNode := viper.GetString(FlagToChainNode)
address, err := builder.GetFromAddress()
if err != nil {
panic(err)
}
c.address = address
c.loop(fromChainID, fromChainNode, toChainID, toChainNode)
}
func (c relayCommander) loop(fromChainID, fromChainNode, toChainID, toChainNode string) {
// get password
name := viper.GetString(client.FlagName)
buf := client.BufferStdin()
prompt := fmt.Sprintf("Password to sign with '%s':", name)
passphrase, err := client.GetPassword(prompt, buf)
if err != nil {
panic(err)
}
ingressKey := ibc.IngressSequenceKey(fromChainID)
processedbz, err := query(toChainNode, ingressKey, c.ibcStore)
if err != nil {
panic(err)
}
var processed int64
if processedbz == nil {
processed = 0
} else if err = c.cdc.UnmarshalBinary(processedbz, &processed); err != nil {
panic(err)
}
OUTER:
for {
time.Sleep(time.Second)
lengthKey := ibc.EgressLengthKey(toChainID)
egressLengthbz, err := query(fromChainNode, lengthKey, c.ibcStore)
if err != nil {
fmt.Printf("Error querying outgoing packet list length: '%s'\n", err)
continue OUTER
}
var egressLength int64
if egressLengthbz == nil {
egressLength = 0
} else if err = c.cdc.UnmarshalBinary(egressLengthbz, &egressLength); err != nil {
panic(err)
}
fmt.Printf("egressLength queried: %d\n", egressLength)
for i := processed; i < egressLength; i++ {
egressbz, err := query(fromChainNode, ibc.EgressKey(toChainID, i), c.ibcStore)
if err != nil {
fmt.Printf("Error querying egress packet: '%s'\n", err)
continue OUTER
}
err = c.broadcastTx(toChainNode, c.refine(egressbz, i, passphrase))
if err != nil {
fmt.Printf("Error broadcasting ingress packet: '%s'\n", err)
continue OUTER
}
fmt.Printf("Relayed packet: %d\n", i)
}
processed = egressLength
}
}
func query(node string, key []byte, storeName string) (res []byte, err error) {
orig := viper.GetString(client.FlagNode)
viper.Set(client.FlagNode, node)
res, err = builder.Query(key, storeName)
viper.Set(client.FlagNode, orig)
return res, err
}
func (c relayCommander) broadcastTx(node string, tx []byte) error {
orig := viper.GetString(client.FlagNode)
viper.Set(client.FlagNode, node)
seq := c.getSequence(node) + 1
viper.Set(client.FlagSequence, seq)
_, err := builder.BroadcastTx(tx)
viper.Set(client.FlagNode, orig)
return err
}
func (c relayCommander) getSequence(node string) int64 {
res, err := query(node, c.address, c.mainStore)
if err != nil {
panic(err)
}
account, err := c.parser(res)
if err != nil {
panic(err)
}
return account.GetSequence()
}
func (c relayCommander) refine(bz []byte, sequence int64, passphrase string) []byte {
var packet ibc.IBCPacket
if err := c.cdc.UnmarshalBinary(bz, &packet); err != nil {
panic(err)
}
msg := ibc.IBCReceiveMsg{
IBCPacket: packet,
Relayer: c.address,
Sequence: sequence,
}
name := viper.GetString(client.FlagName)
res, err := builder.SignAndBuild(name, passphrase, msg, c.cdc)
if err != nil {
panic(err)
}
return res
}

47
x/ibc/errors.go Normal file
View File

@ -0,0 +1,47 @@
package ibc
import (
sdk "github.com/cosmos/cosmos-sdk/types"
)
const (
// IBC errors reserve 200 - 299.
CodeInvalidSequence sdk.CodeType = 200
CodeIdenticalChains sdk.CodeType = 201
CodeUnknownRequest sdk.CodeType = sdk.CodeUnknownRequest
)
func codeToDefaultMsg(code sdk.CodeType) string {
switch code {
case CodeInvalidSequence:
return "Invalid IBC packet sequence"
case CodeIdenticalChains:
return "Source and destination chain cannot be identical"
default:
return sdk.CodeToDefaultMsg(code)
}
}
func ErrInvalidSequence() sdk.Error {
return newError(CodeInvalidSequence, "")
}
func ErrIdenticalChains() sdk.Error {
return newError(CodeIdenticalChains, "")
}
// -------------------------
// Helpers
func newError(code sdk.CodeType, msg string) sdk.Error {
msg = msgOrDefaultMsg(msg, code)
return sdk.NewError(code, msg)
}
func msgOrDefaultMsg(msg string, code sdk.CodeType) string {
if msg != "" {
return msg
} else {
return codeToDefaultMsg(code)
}
}

58
x/ibc/handler.go Normal file
View File

@ -0,0 +1,58 @@
package ibc
import (
"reflect"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/bank"
)
func NewHandler(ibcm IBCMapper, ck bank.CoinKeeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) sdk.Result {
switch msg := msg.(type) {
case IBCTransferMsg:
return handleIBCTransferMsg(ctx, ibcm, ck, msg)
case IBCReceiveMsg:
return handleIBCReceiveMsg(ctx, ibcm, ck, msg)
default:
errMsg := "Unrecognized IBC Msg type: " + reflect.TypeOf(msg).Name()
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
// IBCTransferMsg deducts coins from the account and creates an egress IBC packet.
func handleIBCTransferMsg(ctx sdk.Context, ibcm IBCMapper, ck bank.CoinKeeper, msg IBCTransferMsg) sdk.Result {
packet := msg.IBCPacket
_, err := ck.SubtractCoins(ctx, packet.SrcAddr, packet.Coins)
if err != nil {
return err.Result()
}
err = ibcm.PostIBCPacket(ctx, packet)
if err != nil {
return err.Result()
}
return sdk.Result{}
}
// IBCReceiveMsg adds coins to the destination address and creates an ingress IBC packet.
func handleIBCReceiveMsg(ctx sdk.Context, ibcm IBCMapper, ck bank.CoinKeeper, msg IBCReceiveMsg) sdk.Result {
packet := msg.IBCPacket
seq := ibcm.GetIngressSequence(ctx, packet.SrcChain)
if msg.Sequence != seq {
return ErrInvalidSequence().Result()
}
_, err := ck.AddCoins(ctx, packet.DestAddr, packet.Coins)
if err != nil {
return err.Result()
}
ibcm.SetIngressSequence(ctx, packet.SrcChain, seq+1)
return sdk.Result{}
}

151
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package ibc
import (
"testing"
"github.com/stretchr/testify/assert"
abci "github.com/tendermint/abci/types"
"github.com/tendermint/go-crypto"
oldwire "github.com/tendermint/go-wire"
dbm "github.com/tendermint/tmlibs/db"
"github.com/cosmos/cosmos-sdk/store"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/wire"
"github.com/cosmos/cosmos-sdk/x/auth"
"github.com/cosmos/cosmos-sdk/x/bank"
"github.com/cosmos/cosmos-sdk/examples/basecoin/x/cool"
)
// AccountMapper(/CoinKeeper) and IBCMapper should use different StoreKey later
func defaultContext(key sdk.StoreKey) sdk.Context {
db := dbm.NewMemDB()
cms := store.NewCommitMultiStore(db)
cms.MountStoreWithDB(key, sdk.StoreTypeIAVL, db)
cms.LoadLatestVersion()
ctx := sdk.NewContext(cms, abci.Header{}, false, nil)
return ctx
}
func newAddress() crypto.Address {
return crypto.GenPrivKeyEd25519().PubKey().Address()
}
func getCoins(ck bank.CoinKeeper, ctx sdk.Context, addr crypto.Address) (sdk.Coins, sdk.Error) {
zero := sdk.Coins{}
return ck.AddCoins(ctx, addr, zero)
}
// custom tx codec
// TODO: use new go-wire
func makeCodec() *wire.Codec {
const msgTypeSend = 0x1
const msgTypeIssue = 0x2
const msgTypeQuiz = 0x3
const msgTypeSetTrend = 0x4
const msgTypeIBCTransferMsg = 0x5
const msgTypeIBCReceiveMsg = 0x6
var _ = oldwire.RegisterInterface(
struct{ sdk.Msg }{},
oldwire.ConcreteType{bank.SendMsg{}, msgTypeSend},
oldwire.ConcreteType{bank.IssueMsg{}, msgTypeIssue},
oldwire.ConcreteType{cool.QuizMsg{}, msgTypeQuiz},
oldwire.ConcreteType{cool.SetTrendMsg{}, msgTypeSetTrend},
oldwire.ConcreteType{IBCTransferMsg{}, msgTypeIBCTransferMsg},
oldwire.ConcreteType{IBCReceiveMsg{}, msgTypeIBCReceiveMsg},
)
const accTypeApp = 0x1
var _ = oldwire.RegisterInterface(
struct{ sdk.Account }{},
oldwire.ConcreteType{&auth.BaseAccount{}, accTypeApp},
)
cdc := wire.NewCodec()
// cdc.RegisterInterface((*sdk.Msg)(nil), nil)
// bank.RegisterWire(cdc) // Register bank.[SendMsg,IssueMsg] types.
// crypto.RegisterWire(cdc) // Register crypto.[PubKey,PrivKey,Signature] types.
// ibc.RegisterWire(cdc) // Register ibc.[IBCTransferMsg, IBCReceiveMsg] types.
return cdc
}
func TestIBC(t *testing.T) {
cdc := makeCodec()
key := sdk.NewKVStoreKey("ibc")
ctx := defaultContext(key)
am := auth.NewAccountMapper(key, &auth.BaseAccount{})
ck := bank.NewCoinKeeper(am)
src := newAddress()
dest := newAddress()
chainid := "ibcchain"
zero := sdk.Coins{}
mycoins := sdk.Coins{sdk.Coin{"mycoin", 10}}
coins, err := ck.AddCoins(ctx, src, mycoins)
assert.Nil(t, err)
assert.Equal(t, mycoins, coins)
ibcm := NewIBCMapper(cdc, key)
h := NewHandler(ibcm, ck)
packet := IBCPacket{
SrcAddr: src,
DestAddr: dest,
Coins: mycoins,
SrcChain: chainid,
DestChain: chainid,
}
store := ctx.KVStore(key)
var msg sdk.Msg
var res sdk.Result
var egl int64
var igs int64
egl = ibcm.getEgressLength(store, chainid)
assert.Equal(t, egl, int64(0))
msg = IBCTransferMsg{
IBCPacket: packet,
}
res = h(ctx, msg)
assert.True(t, res.IsOK())
coins, err = getCoins(ck, ctx, src)
assert.Nil(t, err)
assert.Equal(t, zero, coins)
egl = ibcm.getEgressLength(store, chainid)
assert.Equal(t, egl, int64(1))
igs = ibcm.GetIngressSequence(ctx, chainid)
assert.Equal(t, igs, int64(0))
msg = IBCReceiveMsg{
IBCPacket: packet,
Relayer: src,
Sequence: 0,
}
res = h(ctx, msg)
assert.True(t, res.IsOK())
coins, err = getCoins(ck, ctx, dest)
assert.Nil(t, err)
assert.Equal(t, mycoins, coins)
igs = ibcm.GetIngressSequence(ctx, chainid)
assert.Equal(t, igs, int64(1))
res = h(ctx, msg)
assert.False(t, res.IsOK())
igs = ibcm.GetIngressSequence(ctx, chainid)
assert.Equal(t, igs, int64(1))
}

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package ibc
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
wire "github.com/cosmos/cosmos-sdk/wire"
)
type IBCMapper struct {
key sdk.StoreKey
cdc *wire.Codec
}
// XXX: The IBCMapper should not take a CoinKeeper. Rather have the CoinKeeper
// take an IBCMapper.
func NewIBCMapper(cdc *wire.Codec, key sdk.StoreKey) IBCMapper {
// XXX: How are these codecs supposed to work?
return IBCMapper{
key: key,
cdc: cdc,
}
}
// XXX: This is not the public API. This will change in MVP2 and will henceforth
// only be invoked from another module directly and not through a user
// transaction.
// TODO: Handle invalid IBC packets and return errors.
func (ibcm IBCMapper) PostIBCPacket(ctx sdk.Context, packet IBCPacket) sdk.Error {
// write everything into the state
store := ctx.KVStore(ibcm.key)
index := ibcm.getEgressLength(store, packet.DestChain)
bz, err := ibcm.cdc.MarshalBinary(packet)
if err != nil {
panic(err)
}
store.Set(EgressKey(packet.DestChain, index), bz)
bz, err = ibcm.cdc.MarshalBinary(int64(index + 1))
if err != nil {
panic(err)
}
store.Set(EgressLengthKey(packet.DestChain), bz)
return nil
}
// XXX: In the future every module is able to register it's own handler for
// handling it's own IBC packets. The "ibc" handler will only route the packets
// to the appropriate callbacks.
// XXX: For now this handles all interactions with the CoinKeeper.
// XXX: This needs to do some authentication checking.
func (ibcm IBCMapper) ReceiveIBCPacket(ctx sdk.Context, packet IBCPacket) sdk.Error {
return nil
}
// --------------------------
// Functions for accessing the underlying KVStore.
func marshalBinaryPanic(cdc *wire.Codec, value interface{}) []byte {
res, err := cdc.MarshalBinary(value)
if err != nil {
panic(err)
}
return res
}
func unmarshalBinaryPanic(cdc *wire.Codec, bz []byte, ptr interface{}) {
err := cdc.UnmarshalBinary(bz, ptr)
if err != nil {
panic(err)
}
}
func (ibcm IBCMapper) GetIngressSequence(ctx sdk.Context, srcChain string) int64 {
store := ctx.KVStore(ibcm.key)
key := IngressSequenceKey(srcChain)
bz := store.Get(key)
if bz == nil {
zero := marshalBinaryPanic(ibcm.cdc, int64(0))
store.Set(key, zero)
return 0
}
var res int64
unmarshalBinaryPanic(ibcm.cdc, bz, &res)
return res
}
func (ibcm IBCMapper) SetIngressSequence(ctx sdk.Context, srcChain string, sequence int64) {
store := ctx.KVStore(ibcm.key)
key := IngressSequenceKey(srcChain)
bz := marshalBinaryPanic(ibcm.cdc, sequence)
store.Set(key, bz)
}
// Retrieves the index of the currently stored outgoing IBC packets.
func (ibcm IBCMapper) getEgressLength(store sdk.KVStore, destChain string) int64 {
bz := store.Get(EgressLengthKey(destChain))
if bz == nil {
zero := marshalBinaryPanic(ibcm.cdc, int64(0))
store.Set(EgressLengthKey(destChain), zero)
return 0
}
var res int64
unmarshalBinaryPanic(ibcm.cdc, bz, &res)
return res
}
// Stores an outgoing IBC packet under "egress/chain_id/index".
func EgressKey(destChain string, index int64) []byte {
return []byte(fmt.Sprintf("egress/%s/%d", destChain, index))
}
// Stores the number of outgoing IBC packets under "egress/index".
func EgressLengthKey(destChain string) []byte {
return []byte(fmt.Sprintf("egress/%s", destChain))
}
// Stores the sequence number of incoming IBC packet under "ingress/index".
func IngressSequenceKey(srcChain string) []byte {
return []byte(fmt.Sprintf("ingress/%s", srcChain))
}

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package ibc
import (
sdk "github.com/cosmos/cosmos-sdk/types"
wire "github.com/cosmos/cosmos-sdk/wire"
)
// ------------------------------
// IBCPacket
// IBCPacket defines a piece of data that can be send between two separate
// blockchains.
type IBCPacket struct {
SrcAddr sdk.Address
DestAddr sdk.Address
Coins sdk.Coins
SrcChain string
DestChain string
}
func NewIBCPacket(srcAddr sdk.Address, destAddr sdk.Address, coins sdk.Coins,
srcChain string, destChain string) IBCPacket {
return IBCPacket{
SrcAddr: srcAddr,
DestAddr: destAddr,
Coins: coins,
SrcChain: srcChain,
DestChain: destChain,
}
}
func (ibcp IBCPacket) ValidateBasic() sdk.Error {
if ibcp.SrcChain == ibcp.DestChain {
return ErrIdenticalChains().Trace("")
}
if !ibcp.Coins.IsValid() {
return sdk.ErrInvalidCoins("")
}
return nil
}
// ----------------------------------
// IBCTransferMsg
// IBCTransferMsg defines how another module can send an IBCPacket.
type IBCTransferMsg struct {
IBCPacket
}
func (msg IBCTransferMsg) Type() string {
return "ibc"
}
func (msg IBCTransferMsg) Get(key interface{}) interface{} {
return nil
}
func (msg IBCTransferMsg) GetSignBytes() []byte {
cdc := wire.NewCodec()
bz, err := cdc.MarshalBinary(msg)
if err != nil {
panic(err)
}
return bz
}
func (msg IBCTransferMsg) ValidateBasic() sdk.Error {
return msg.IBCPacket.ValidateBasic()
}
// x/bank/tx.go SendMsg.GetSigners()
func (msg IBCTransferMsg) GetSigners() []sdk.Address {
return []sdk.Address{msg.SrcAddr}
}
// ----------------------------------
// IBCReceiveMsg
// IBCReceiveMsg defines the message that a relayer uses to post an IBCPacket
// to the destination chain.
type IBCReceiveMsg struct {
IBCPacket
Relayer sdk.Address
Sequence int64
}
func (msg IBCReceiveMsg) Type() string {
return "ibc"
}
func (msg IBCReceiveMsg) Get(key interface{}) interface{} {
return nil
}
func (msg IBCReceiveMsg) GetSignBytes() []byte {
cdc := wire.NewCodec()
bz, err := cdc.MarshalBinary(msg)
if err != nil {
panic(err)
}
return bz
}
func (msg IBCReceiveMsg) ValidateBasic() sdk.Error {
return msg.IBCPacket.ValidateBasic()
}
// x/bank/tx.go SendMsg.GetSigners()
func (msg IBCReceiveMsg) GetSigners() []sdk.Address {
return []sdk.Address{msg.Relayer}
}

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package ibc
import (
"testing"
"github.com/stretchr/testify/assert"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// --------------------------------
// IBCPacket Tests
func TestIBCPacketValidation(t *testing.T) {
cases := []struct {
valid bool
packet IBCPacket
}{
{true, constructIBCPacket(true)},
{false, constructIBCPacket(false)},
}
for i, tc := range cases {
err := tc.packet.ValidateBasic()
if tc.valid {
assert.Nil(t, err, "%d: %+v", i, err)
} else {
assert.NotNil(t, err, "%d", i)
}
}
}
// -------------------------------
// IBCTransferMsg Tests
func TestIBCTransferMsg(t *testing.T) {
packet := constructIBCPacket(true)
msg := IBCTransferMsg{packet}
assert.Equal(t, msg.Type(), "ibc")
}
func TestIBCTransferMsgValidation(t *testing.T) {
validPacket := constructIBCPacket(true)
invalidPacket := constructIBCPacket(false)
cases := []struct {
valid bool
msg IBCTransferMsg
}{
{true, IBCTransferMsg{validPacket}},
{false, IBCTransferMsg{invalidPacket}},
}
for i, tc := range cases {
err := tc.msg.ValidateBasic()
if tc.valid {
assert.Nil(t, err, "%d: %+v", i, err)
} else {
assert.NotNil(t, err, "%d", i)
}
}
}
// -------------------------------
// IBCReceiveMsg Tests
func TestIBCReceiveMsg(t *testing.T) {
packet := constructIBCPacket(true)
msg := IBCReceiveMsg{packet, sdk.Address([]byte("relayer")), 0}
assert.Equal(t, msg.Type(), "ibc")
}
func TestIBCReceiveMsgValidation(t *testing.T) {
validPacket := constructIBCPacket(true)
invalidPacket := constructIBCPacket(false)
cases := []struct {
valid bool
msg IBCReceiveMsg
}{
{true, IBCReceiveMsg{validPacket, sdk.Address([]byte("relayer")), 0}},
{false, IBCReceiveMsg{invalidPacket, sdk.Address([]byte("relayer")), 0}},
}
for i, tc := range cases {
err := tc.msg.ValidateBasic()
if tc.valid {
assert.Nil(t, err, "%d: %+v", i, err)
} else {
assert.NotNil(t, err, "%d", i)
}
}
}
// -------------------------------
// Helpers
func constructIBCPacket(valid bool) IBCPacket {
srcAddr := sdk.Address([]byte("source"))
destAddr := sdk.Address([]byte("destination"))
coins := sdk.Coins{{"atom", 10}}
srcChain := "source-chain"
destChain := "dest-chain"
if valid {
return NewIBCPacket(srcAddr, destAddr, coins, srcChain, destChain)
} else {
return NewIBCPacket(srcAddr, destAddr, coins, srcChain, srcChain)
}
}

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package ibc
import (
"github.com/cosmos/cosmos-sdk/wire"
)
// Register concrete types on wire codec
func RegisterWire(cdc *wire.Codec) {
//cdc.RegisterConcrete(IBCTransferMsg{}, "github.com/cosmos/cosmos-sdk/x/ibc/IBCTransferMsg", nil)
//cdc.RegisterConcrete(IBCReceiveMsg{}, "github.com/cosmos/cosmos-sdk/x/ibc/IBCReceiveMsg", nil)
}