forked from cerc-io/plugeth
70 lines
2.1 KiB
Go
70 lines
2.1 KiB
Go
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// Copyright 2023 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// go-ethereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package ethtest
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"os"
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"path"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/golang-jwt/jwt/v4"
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)
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// EngineClient is a wrapper around engine-related data.
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type EngineClient struct {
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url string
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jwt [32]byte
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headfcu []byte
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}
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// NewEngineClient creates a new engine client.
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func NewEngineClient(dir, url, jwt string) (*EngineClient, error) {
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headfcu, err := os.ReadFile(path.Join(dir, "headfcu.json"))
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if err != nil {
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return nil, fmt.Errorf("failed to read headfcu: %w", err)
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}
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return &EngineClient{url, common.HexToHash(jwt), headfcu}, nil
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}
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// token returns the jwt claim token for authorization.
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func (ec *EngineClient) token() string {
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claims := jwt.RegisteredClaims{IssuedAt: jwt.NewNumericDate(time.Now())}
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token, _ := jwt.NewWithClaims(jwt.SigningMethodHS256, claims).SignedString(ec.jwt[:])
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return token
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}
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// sendForkchoiceUpdated sends an fcu for the head of the generated chain.
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func (ec *EngineClient) sendForkchoiceUpdated() error {
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var (
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req, _ = http.NewRequest(http.MethodPost, ec.url, io.NopCloser(bytes.NewReader(ec.headfcu)))
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header = make(http.Header)
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)
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// Set header
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header.Set("accept", "application/json")
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header.Set("content-type", "application/json")
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header.Set("Authorization", fmt.Sprintf("Bearer %v", ec.token()))
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req.Header = header
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_, err := new(http.Client).Do(req)
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return err
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}
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