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rest.go
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rest.go
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package rest
import (
"fmt"
"net/http"
"strconv"
"github.com/cosmos/cosmos-sdk/client/context"
"github.com/cosmos/cosmos-sdk/types/rest"
"github.com/cosmos/cosmos-sdk/codec"
"github.com/gorilla/mux"
clientrest "github.com/cosmos/cosmos-sdk/client/rest"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/peggy/x/ethbridge"
"github.com/cosmos/peggy/x/ethbridge/querier"
"github.com/cosmos/peggy/x/ethbridge/types"
)
const (
restNonce = "nonce"
restEthereumSender = "ethereumSender"
)
// RegisterRoutes - Central function to define routes that get registered by the main application
func RegisterRoutes(cliCtx context.CLIContext, r *mux.Router, cdc *codec.Codec, queryRoute string) {
r.HandleFunc(fmt.Sprintf("/%s/prophecies", queryRoute), createClaimHandler(cdc, cliCtx)).Methods("POST")
r.HandleFunc(fmt.Sprintf("/%s/prophecies/{%s}/{%s}", queryRoute, restNonce, restEthereumSender), getProphecyHandler(cdc, cliCtx, queryRoute)).Methods("GET")
}
type createEthClaimReq struct {
BaseReq rest.BaseReq `json:"base_req"`
Nonce int `json:"nonce"`
EthereumSender string `json:"ethereum_sender"`
CosmosReceiver string `json:"cosmos_receiver"`
Validator string `json:"validator"`
Amount string `json:"amount"`
}
func createClaimHandler(cdc *codec.Codec, cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
var req createEthClaimReq
if !rest.ReadRESTReq(w, r, cdc, &req) {
rest.WriteErrorResponse(w, http.StatusBadRequest, "failed to parse request")
return
}
baseReq := req.BaseReq.Sanitize()
if !baseReq.ValidateBasic(w) {
return
}
ethereumSender := types.NewEthereumAddress(req.EthereumSender)
cosmosReceiver, err := sdk.AccAddressFromBech32(req.CosmosReceiver)
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
validator, err := sdk.ValAddressFromBech32(req.Validator)
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
amount, err := sdk.ParseCoins(req.Amount)
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
// create the message
ethBridgeClaim := types.NewEthBridgeClaim(req.Nonce, ethereumSender, cosmosReceiver, validator, amount)
msg := ethbridge.NewMsgCreateEthBridgeClaim(ethBridgeClaim)
err = msg.ValidateBasic()
if err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
clientrest.WriteGenerateStdTxResponse(w, cdc, cliCtx, baseReq, []sdk.Msg{msg})
}
}
func getProphecyHandler(cdc *codec.Codec, cliCtx context.CLIContext, queryRoute string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
nonce := vars[restNonce]
nonceString, err := strconv.Atoi(nonce)
if err != nil {
rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
return
}
ethereumSender := types.NewEthereumAddress(vars[restEthereumSender])
bz, err := cdc.MarshalJSON(ethbridge.NewQueryEthProphecyParams(nonceString, ethereumSender))
if err != nil {
rest.WriteErrorResponse(w, http.StatusNotFound, err.Error())
return
}
route := fmt.Sprintf("custom/%s/%s", queryRoute, querier.QueryEthProphecy)
res, err := cliCtx.QueryWithData(route, bz)
if err != nil {
rest.WriteErrorResponse(w, http.StatusNotFound, err.Error())
return
}
rest.PostProcessResponse(w, cdc, res, cliCtx.Indent)
}
}