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// Copyright 2021 The Swarm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package api
import (
"encoding/hex"
"encoding/json"
"errors"
"math/big"
"net/http"
"strconv"
"github.com/ethersphere/bee/pkg/bigint"
"github.com/ethersphere/bee/pkg/jsonhttp"
"github.com/ethersphere/bee/pkg/postage/postagecontract"
"github.com/ethersphere/bee/pkg/sctx"
"github.com/gorilla/mux"
)
const (
gasPriceHeader = "Gas-Price"
immutableHeader = "Immutable"
errBadGasPrice = "bad gas price"
)
type batchID []byte
func (b batchID) MarshalJSON() ([]byte, error) {
return json.Marshal(hex.EncodeToString(b))
}
type postageCreateResponse struct {
BatchID batchID `json:"batchID"`
}
func (s *server) postageCreateHandler(w http.ResponseWriter, r *http.Request) {
depthStr := mux.Vars(r)["depth"]
amount, ok := big.NewInt(0).SetString(mux.Vars(r)["amount"], 10)
if !ok {
s.logger.Error("create batch: invalid amount")
jsonhttp.BadRequest(w, "invalid postage amount")
return
}
depth, err := strconv.ParseUint(depthStr, 10, 8)
if err != nil {
s.logger.Debugf("create batch: invalid depth: %v", err)
s.logger.Error("create batch: invalid depth")
jsonhttp.BadRequest(w, "invalid depth")
return
}
label := r.URL.Query().Get("label")
ctx := r.Context()
if price, ok := r.Header[gasPriceHeader]; ok {
p, ok := big.NewInt(0).SetString(price[0], 10)
if !ok {
s.logger.Error("create batch: bad gas price")
jsonhttp.BadRequest(w, errBadGasPrice)
return
}
ctx = sctx.SetGasPrice(ctx, p)
}
var immutable bool
if val, ok := r.Header[immutableHeader]; ok {
immutable, _ = strconv.ParseBool(val[0])
}
batchID, err := s.postageContract.CreateBatch(ctx, amount, uint8(depth), immutable, label)
if err != nil {
if errors.Is(err, postagecontract.ErrInsufficientFunds) {
s.logger.Debugf("create batch: out of funds: %v", err)
s.logger.Error("create batch: out of funds")
jsonhttp.BadRequest(w, "out of funds")
return
}
if errors.Is(err, postagecontract.ErrInvalidDepth) {
s.logger.Debugf("create batch: invalid depth: %v", err)
s.logger.Error("create batch: invalid depth")
jsonhttp.BadRequest(w, "invalid depth")
return
}
s.logger.Debugf("create batch: failed to create: %v", err)
s.logger.Error("create batch: failed to create")
jsonhttp.InternalServerError(w, "cannot create batch")
return
}
jsonhttp.Created(w, &postageCreateResponse{
BatchID: batchID,
})
}
type postageStampResponse struct {
BatchID batchID `json:"batchID"`
Utilization uint32 `json:"utilization"`
Usable bool `json:"usable"`
Label string `json:"label"`
Depth uint8 `json:"depth"`
Amount *bigint.BigInt `json:"amount"`
BucketDepth uint8 `json:"bucketDepth"`
BlockNumber uint64 `json:"blockNumber"`
ImmutableFlag bool `json:"immutableFlag"`
}
type postageStampsResponse struct {
Stamps []postageStampResponse `json:"stamps"`
}
func (s *server) postageGetStampsHandler(w http.ResponseWriter, _ *http.Request) {
resp := postageStampsResponse{}
for _, v := range s.post.StampIssuers() {
resp.Stamps = append(resp.Stamps, postageStampResponse{
BatchID: v.ID(),
Utilization: v.Utilization(),
Usable: s.post.IssuerUsable(v),
Label: v.Label(),
Depth: v.Depth(),
Amount: bigint.Wrap(v.Amount()),
BucketDepth: v.BucketDepth(),
BlockNumber: v.BlockNumber(),
ImmutableFlag: v.ImmutableFlag(),
})
}
jsonhttp.OK(w, resp)
}
func (s *server) postageGetStampHandler(w http.ResponseWriter, r *http.Request) {
idStr := mux.Vars(r)["id"]
if idStr == "" || len(idStr) != 64 {
s.logger.Error("get stamp issuer: invalid batchID")
jsonhttp.BadRequest(w, "invalid batchID")
return
}
id, err := hex.DecodeString(idStr)
if err != nil {
s.logger.Error("get stamp issuer: invalid batchID: %v", err)
s.logger.Error("get stamp issuer: invalid batchID")
jsonhttp.BadRequest(w, "invalid batchID")
return
}
issuer, err := s.post.GetStampIssuer(id)
if err != nil {
s.logger.Error("get stamp issuer: get issuer: %v", err)
s.logger.Error("get stamp issuer: get issuer")
jsonhttp.BadRequest(w, "cannot get issuer")
return
}
resp := postageStampResponse{
BatchID: id,
Utilization: issuer.Utilization(),
Usable: s.post.IssuerUsable(issuer),
Label: issuer.Label(),
Depth: issuer.Depth(),
Amount: bigint.Wrap(issuer.Amount()),
BucketDepth: issuer.BucketDepth(),
BlockNumber: issuer.BlockNumber(),
ImmutableFlag: issuer.ImmutableFlag(),
}
jsonhttp.OK(w, &resp)
}