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util.go
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util.go
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package tests
import (
"fmt"
"io/ioutil"
"net/http"
"time"
amino "github.com/tendermint/go-amino"
tmclient "github.com/tendermint/tendermint/rpc/client"
ctypes "github.com/tendermint/tendermint/rpc/core/types"
rpcclient "github.com/tendermint/tendermint/rpc/lib/client"
)
// Wait for the next tendermint block from the Tendermint RPC
// on localhost
func WaitForNextHeightTM(port string) {
url := fmt.Sprintf("http://localhost:%v", port)
cl := tmclient.NewHTTP(url, "/websocket")
resBlock, err := cl.Block(nil)
if err != nil {
panic(err)
}
waitForHeightTM(resBlock.Block.Height+1, url)
}
// Wait for the given height from the Tendermint RPC
// on localhost
func WaitForHeightTM(height int64, port string) {
url := fmt.Sprintf("http://localhost:%v", port)
waitForHeightTM(height, url)
}
func waitForHeightTM(height int64, url string) {
cl := tmclient.NewHTTP(url, "/websocket")
for {
// get url, try a few times
var resBlock *ctypes.ResultBlock
var err error
INNER:
for i := 0; i < 5; i++ {
resBlock, err = cl.Block(nil)
if err == nil {
break INNER
}
time.Sleep(time.Millisecond * 200)
}
if err != nil {
panic(err)
}
if resBlock.Block != nil &&
resBlock.Block.Height >= height {
fmt.Println("HEIGHT", resBlock.Block.Height)
return
}
time.Sleep(time.Millisecond * 100)
}
}
// Wait for height from the LCD API on localhost
func WaitForHeight(height int64, port string) {
url := fmt.Sprintf("http://localhost:%v/blocks/latest", port)
waitForHeight(height, url)
}
func waitForHeight(height int64, url string) {
for {
// get url, try a few times
var res *http.Response
var err error
for i := 0; i < 5; i++ {
res, err = http.Get(url)
if err == nil {
break
}
time.Sleep(time.Millisecond * 200)
}
if err != nil {
panic(err)
}
body, err := ioutil.ReadAll(res.Body)
if err != nil {
panic(err)
}
res.Body.Close()
var resultBlock ctypes.ResultBlock
err = cdc.UnmarshalJSON([]byte(body), &resultBlock)
if err != nil {
fmt.Println("RES", res)
fmt.Println("BODY", string(body))
panic(err)
}
if resultBlock.Block != nil &&
resultBlock.Block.Height >= height {
return
}
time.Sleep(time.Millisecond * 100)
}
}
// wait for tendermint to start
func WaitForStart(port string) {
var err error
for i := 0; i < 5; i++ {
time.Sleep(time.Second)
url := fmt.Sprintf("http://localhost:%v/blocks/latest", port)
// get url, try a few times
var res *http.Response
res, err = http.Get(url)
if err == nil || res == nil {
continue
}
// waiting for server to start ...
if res.StatusCode != http.StatusOK {
res.Body.Close()
return
}
}
if err != nil {
panic(err)
}
}
// TODO: these functions just print to Stdout.
// consider using the logger.
// Wait for the RPC server to respond to /status
func WaitForRPC(laddr string) {
fmt.Println("LADDR", laddr)
client := rpcclient.NewJSONRPCClient(laddr)
ctypes.RegisterAmino(client.Codec())
result := new(ctypes.ResultStatus)
for {
_, err := client.Call("status", map[string]interface{}{}, result)
if err == nil {
return
}
fmt.Printf("Waiting for RPC server to start on %s:%v\n", laddr, err)
time.Sleep(time.Millisecond)
}
}
var cdc = amino.NewCodec()
func init() {
ctypes.RegisterAmino(cdc)
}