0g-chain/x/swap/client/rest/tx.go
Nick DeLuca 20437a91fb
Add E2E Swap Support (#959)
* add message types for swaps

* add tx client commands

* add test coverage for swap message deadlines

* start handler swap tests, export handler result message event into
private method, add stubbed keeper methods

* add initial swap implementation to get handler tests passing; adds event
specific for trades

* add handler acceptance test for slippage in exact input and exact output
swaps

* implement slippage limit for swap keeper methods

* add tests to ensure a user can only swap spendable coins

* test pool not found, panic on invalid pool, and panic when module
account does not have enough funds

* validate that the exact output when using for exact swaps is less than
the pool liquidity

* nit: long line

* add validation that swap output is greater than zero

* add rest txs for swap messages

* nit: lints

* dry up swap keeper methods

* from pr feedback - spelling and increase clairty around the output
amount of a swap rounding to zero
2021-07-13 17:44:05 -05:00

107 lines
3.4 KiB
Go

package rest
import (
"fmt"
"net/http"
"github.com/gorilla/mux"
"github.com/cosmos/cosmos-sdk/client/context"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/rest"
"github.com/cosmos/cosmos-sdk/x/auth/client/utils"
"github.com/kava-labs/kava/x/swap/types"
)
func registerTxRoutes(cliCtx context.CLIContext, r *mux.Router) {
r.HandleFunc(fmt.Sprintf("/%s/deposit", types.ModuleName), postDepositHandlerFn(cliCtx)).Methods("POST")
r.HandleFunc(fmt.Sprintf("/%s/withdraw", types.ModuleName), postWithdrawHandlerFn(cliCtx)).Methods("POST")
r.HandleFunc(fmt.Sprintf("/%s/swapExactForTokens", types.ModuleName), postSwapExactForTokensHandlerFn(cliCtx)).Methods("POST")
r.HandleFunc(fmt.Sprintf("/%s/swapForExactTokens", types.ModuleName), postSwapForExactTokensHandlerFn(cliCtx)).Methods("POST")
}
func postDepositHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Decode POST request body
var req PostCreateDepositReq
if !rest.ReadRESTReq(w, r, cliCtx.Codec, &req) {
return
}
req.BaseReq = req.BaseReq.Sanitize()
if !req.BaseReq.ValidateBasic(w) {
return
}
msg := types.NewMsgDeposit(req.From, req.TokenA, req.TokenB, req.Slippage, req.Deadline)
if err := msg.ValidateBasic(); err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
utils.WriteGenerateStdTxResponse(w, cliCtx, req.BaseReq, []sdk.Msg{msg})
}
}
func postWithdrawHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Decode POST request body
var req PostCreateWithdrawReq
if !rest.ReadRESTReq(w, r, cliCtx.Codec, &req) {
return
}
req.BaseReq = req.BaseReq.Sanitize()
if !req.BaseReq.ValidateBasic(w) {
return
}
msg := types.NewMsgWithdraw(req.From, req.Shares, req.MinTokenA, req.MinTokenA, req.Deadline)
if err := msg.ValidateBasic(); err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
utils.WriteGenerateStdTxResponse(w, cliCtx, req.BaseReq, []sdk.Msg{msg})
}
}
func postSwapExactForTokensHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Decode POST request body
var req PostCreateSwapExactForTokensReq
if !rest.ReadRESTReq(w, r, cliCtx.Codec, &req) {
return
}
req.BaseReq = req.BaseReq.Sanitize()
if !req.BaseReq.ValidateBasic(w) {
return
}
msg := types.NewMsgSwapExactForTokens(req.Requester, req.ExactTokenA, req.TokenB, req.Slippage, req.Deadline)
if err := msg.ValidateBasic(); err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
utils.WriteGenerateStdTxResponse(w, cliCtx, req.BaseReq, []sdk.Msg{msg})
}
}
func postSwapForExactTokensHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Decode POST request body
var req PostCreateSwapForExactTokensReq
if !rest.ReadRESTReq(w, r, cliCtx.Codec, &req) {
return
}
req.BaseReq = req.BaseReq.Sanitize()
if !req.BaseReq.ValidateBasic(w) {
return
}
msg := types.NewMsgSwapForExactTokens(req.Requester, req.TokenA, req.ExactTokenB, req.Slippage, req.Deadline)
if err := msg.ValidateBasic(); err != nil {
rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
return
}
utils.WriteGenerateStdTxResponse(w, cliCtx, req.BaseReq, []sdk.Msg{msg})
}
}