solana-go/programs/serum/rpc.go

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// Copyright 2020 dfuse Platform Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
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package serum
import (
"bytes"
"context"
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"encoding/json"
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"fmt"
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rice "github.com/GeertJohan/go.rice"
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bin "github.com/dfuse-io/binary"
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"github.com/dfuse-io/solana-go"
"github.com/dfuse-io/solana-go/rpc"
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"github.com/dfuse-io/solana-go/rpc/ws"
"go.uber.org/zap"
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)
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//go:generate rice embed-go
// TODO: hit the chain and
func KnownMarket() ([]*MarketMeta, error) {
box := rice.MustFindBox("data").MustBytes("markets.json")
if box == nil {
return nil, fmt.Errorf("unable to retrieve known markets")
}
dec := json.NewDecoder(bytes.NewReader(box))
var markets []*MarketMeta
err := dec.Decode(&markets)
if err != nil {
return nil, fmt.Errorf("unable to decode known markets: %w", err)
}
return markets, nil
}
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func FetchOpenOrders(ctx context.Context, rpcCli *rpc.Client, openOrdersAddr solana.PublicKey) (*OpenOrdersMeta, error) {
acctInfo, err := rpcCli.GetAccountInfo(ctx, openOrdersAddr)
if err != nil {
return nil, fmt.Errorf("unable to get open orders account:%w", err)
}
openOrdersMeta := &OpenOrdersMeta{}
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if err := openOrdersMeta.OpenOrders.Decode(acctInfo.Value.Data); err != nil {
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return nil, fmt.Errorf("decoding market v2: %w", err)
}
return openOrdersMeta, nil
}
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func FetchMarket(ctx context.Context, rpcCli *rpc.Client, marketAddr solana.PublicKey) (*MarketMeta, error) {
acctInfo, err := rpcCli.GetAccountInfo(ctx, marketAddr)
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if err != nil {
return nil, fmt.Errorf("unable to get market account:%w", err)
}
meta := &MarketMeta{
Address: marketAddr,
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}
dataLen := len(acctInfo.Value.Data)
switch dataLen {
// case 380:
// // if err := meta.MarketV1.Decode(acctInfo.Value.Data); err != nil {
// // return nil, fmt.Errorf("decoding market v1: %w", err)
// // }
// return nil, fmt.Errorf("Unsupported market version, w/ data length of 380")
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case 388:
if err := meta.MarketV2.Decode(acctInfo.Value.Data); err != nil {
return nil, fmt.Errorf("decoding market v2: %w", err)
}
default:
return nil, fmt.Errorf("unsupported market data length: %d", dataLen)
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}
if err := rpcCli.GetAccountDataIn(ctx, meta.MarketV2.QuoteMint, &meta.QuoteMint); err != nil {
return nil, fmt.Errorf("getting quote mint: %w", err)
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}
if err := rpcCli.GetAccountDataIn(ctx, meta.MarketV2.BaseMint, &meta.BaseMint); err != nil {
return nil, fmt.Errorf("getting base token: %w", err)
}
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return meta, nil
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}
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func StreamOpenOrders(client *ws.Client) error {
sub, err := client.ProgramSubscribe(DEXProgramIDV2, rpc.CommitmentSingleGossip)
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if err != nil {
return fmt.Errorf("unable to subscribe to programID %q: %w", DEXProgramIDV2, err)
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}
count := 0
for {
d, err := sub.Recv()
if err != nil {
return fmt.Errorf("received error from programID subscription: %w", err)
}
res := d.(*ws.ProgramResult)
var f *AccountFlag
err = bin.NewDecoder(res.Value.Account.Data).Decode(&f)
if err != nil {
fmt.Println("***********************************", err)
zlog.Debug("unable to decoce account flag for account... skipping",
zap.Stringer("account_address", res.Value.PubKey),
)
continue
}
fmt.Printf("%d - %s\n", count, f.String())
count++
}
}