172 lines
5.3 KiB
Go
172 lines
5.3 KiB
Go
package ethclient
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import (
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"context"
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"math/big"
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"github.com/Secured-Finance/dione/contracts/aggregator"
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"github.com/Secured-Finance/dione/contracts/dioneStaking"
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stakingContract "github.com/Secured-Finance/dione/contracts/dioneStaking"
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oracleEmitter "github.com/Secured-Finance/dione/contracts/oracleemitter"
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethclient"
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"github.com/ethereum/go-ethereum/event"
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)
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// TODO: change artifacts for other contracts
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type EthereumClient struct {
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client *ethclient.Client
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ethAddress *common.Address
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authTransactor *bind.TransactOpts
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oracleEmitter *oracleEmitter.OracleEmitterSession
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aggregator *aggregator.AggregatorSession
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dioneStaking *stakingContract.DioneStakingSession
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}
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type OracleEvent struct {
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RequestType string
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CallbackAddress common.Address
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CallbackMethodID [4]byte
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RequestID *big.Int
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}
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type Ethereum interface {
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Initialize(ctx context.Context, url, connectionType, privateKey, oracleEmitterContractAddress, aggregatorContractAddress string) error
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Balance(context.Context, string) (*big.Int, error)
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SubscribeOnSmartContractEvents(context.Context, string)
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SubmitRequestAnswer(reqID *big.Int, data string, callbackAddress common.Address, callbackMethodID [4]byte) error
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}
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func NewEthereumClient() *EthereumClient {
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ethereumClient := &EthereumClient{}
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return ethereumClient
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}
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func (c *EthereumClient) Initialize(ctx context.Context, url, privateKey, oracleEmitterContractAddress, aggregatorContractAddress, dioneStakingAddress string) error {
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client, err := ethclient.Dial(url)
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if err != nil {
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return err
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}
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c.client = client
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ecdsaKey, err := crypto.HexToECDSA(privateKey)
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if err != nil {
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return err
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}
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authTransactor := bind.NewKeyedTransactor(ecdsaKey)
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c.authTransactor = authTransactor
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c.ethAddress = &c.authTransactor.From
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emitter, err := oracleEmitter.NewOracleEmitter(common.HexToAddress(oracleEmitterContractAddress), client)
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if err != nil {
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return err
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}
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aggregatorPlainSC, err := aggregator.NewAggregator(common.HexToAddress(aggregatorContractAddress), client)
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if err != nil {
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return err
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}
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stakingContract, err := dioneStaking.NewDioneStaking(common.HexToAddress(dioneStakingAddress), client)
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if err != nil {
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return err
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}
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c.oracleEmitter = &oracleEmitter.OracleEmitterSession{
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Contract: emitter,
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CallOpts: bind.CallOpts{
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Pending: true,
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From: authTransactor.From,
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Context: context.Background(),
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},
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TransactOpts: bind.TransactOpts{
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From: authTransactor.From,
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Signer: authTransactor.Signer,
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GasLimit: 200000, // 0 automatically estimates gas limit
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GasPrice: nil, // nil automatically suggests gas price
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Context: context.Background(),
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},
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}
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c.aggregator = &aggregator.AggregatorSession{
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Contract: aggregatorPlainSC,
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CallOpts: bind.CallOpts{
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Pending: true,
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From: authTransactor.From,
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Context: context.Background(),
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},
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TransactOpts: bind.TransactOpts{
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From: authTransactor.From,
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Signer: authTransactor.Signer,
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GasLimit: 200000, // 0 automatically estimates gas limit
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GasPrice: nil, // nil automatically suggests gas price
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Context: context.Background(),
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},
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}
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c.dioneStaking = &dioneStaking.DioneStakingSession{
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Contract: stakingContract,
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CallOpts: bind.CallOpts{
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Pending: true,
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From: authTransactor.From,
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Context: context.Background(),
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},
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TransactOpts: bind.TransactOpts{
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From: authTransactor.From,
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Signer: authTransactor.Signer,
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GasLimit: 200000, // 0 automatically estimates gas limit
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GasPrice: big.NewInt(1860127603), // nil automatically suggests gas price
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Context: context.Background(),
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},
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}
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return nil
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}
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func (c *EthereumClient) GetEthAddress() *common.Address {
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return c.ethAddress
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}
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func (c *EthereumClient) SubscribeOnOracleEvents(ctx context.Context) (chan *oracleEmitter.OracleEmitterNewOracleRequest, event.Subscription, error) {
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resChan := make(chan *oracleEmitter.OracleEmitterNewOracleRequest)
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requestsFilter := c.oracleEmitter.Contract.OracleEmitterFilterer
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subscription, err := requestsFilter.WatchNewOracleRequest(&bind.WatchOpts{
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Start: nil, //last block
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Context: ctx,
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}, resChan)
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if err != nil {
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return nil, nil, err
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}
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return resChan, subscription, err
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}
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func (c *EthereumClient) SubmitRequestAnswer(reqID *big.Int, data string, callbackAddress common.Address, callbackMethodID [4]byte) error {
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// privateKey, err := crypto.HexToECDSA(private_key)
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// if err != nil {
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// c.Logger.Fatal("Failed to generate private key", err)
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// }
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// publicKey := privateKey.Public()
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// publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
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// if !ok {
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// c.Logger.Fatal("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
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// }
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// publicKeyBytes := crypto.FromECDSAPub(publicKeyECDSA)
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// c.Logger.Info(hexutil.Encode(publicKeyBytes)[4:])
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// fromAddress := crypto.PubkeyToAddress(*publicKeyECDSA)
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// nonce, err := c.HttpClient.PendingNonceAt(ctx, fromAddress)
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// if err != nil {
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// c.Logger.Fatal(err)
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// }
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// gasPrice, err := c.HttpClient.SuggestGasPrice(ctx)
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// if err != nil {
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// c.Logger.Fatal(err)
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// }
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_, err := c.aggregator.CollectData(reqID, data, callbackAddress, callbackMethodID)
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if err != nil {
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return err
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}
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return nil
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}
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