package miner import ( "errors" "math/big" "github.com/cosmos/cosmos-sdk/client/flags" "github.com/cosmos/cosmos-sdk/client/tx" "github.com/cosmos/cosmos-sdk/server" "github.com/cosmos/cosmos-sdk/server/config" sdk "github.com/cosmos/cosmos-sdk/types" authtx "github.com/cosmos/cosmos-sdk/x/auth/tx" distributiontypes "github.com/cosmos/cosmos-sdk/x/distribution/types" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" "github.com/tendermint/tendermint/libs/log" tmtypes "github.com/tendermint/tendermint/types" "github.com/tharsis/ethermint/ethereum/rpc/backend" "github.com/tharsis/ethermint/ethereum/rpc/namespaces/eth" rpctypes "github.com/tharsis/ethermint/ethereum/rpc/types" ) // API is the miner prefixed set of APIs in the Miner JSON-RPC spec. type API struct { ctx *server.Context logger log.Logger ethAPI *eth.PublicAPI backend backend.Backend } // NewMinerAPI creates an instance of the Miner API. func NewMinerAPI( ctx *server.Context, ethAPI *eth.PublicAPI, backend backend.Backend, ) *API { return &API{ ctx: ctx, ethAPI: ethAPI, logger: ctx.Logger.With("api", "miner"), backend: backend, } } // SetEtherbase sets the etherbase of the miner func (api *API) SetEtherbase(etherbase common.Address) bool { api.logger.Debug("miner_setEtherbase") delAddr, err := api.backend.GetCoinbase() if err != nil { api.logger.Debug("failed to get coinbase address", "error", err.Error()) return false } withdrawAddr := sdk.AccAddress(etherbase.Bytes()) msg := distributiontypes.NewMsgSetWithdrawAddress(delAddr, withdrawAddr) if err := msg.ValidateBasic(); err != nil { api.logger.Debug("tx failed basic validation", "error", err.Error()) return false } // Assemble transaction from fields builder, ok := api.ethAPI.ClientCtx().TxConfig.NewTxBuilder().(authtx.ExtensionOptionsTxBuilder) if !ok { api.logger.Debug("clientCtx.TxConfig.NewTxBuilder returns unsupported builder", "error", err.Error()) return false } err = builder.SetMsgs(msg) if err != nil { api.logger.Error("builder.SetMsgs failed", "error", err.Error()) return false } // Fetch minimun gas price to calculate fees using the configuration. appConf, err := config.ParseConfig(api.ctx.Viper) if err != nil { api.logger.Error("failed to parse file.", "file", api.ctx.Viper.ConfigFileUsed(), "error:", err.Error()) return false } minGasPrices := appConf.GetMinGasPrices() if len(minGasPrices) == 0 || minGasPrices.Empty() { api.logger.Debug("the minimun fee is not set") return false } minGasPriceValue := minGasPrices[0].Amount denom := minGasPrices[0].Denom delCommonAddr := common.BytesToAddress(delAddr.Bytes()) nonce, err := api.ethAPI.GetTransactionCount(delCommonAddr, rpctypes.EthPendingBlockNumber) if err != nil { api.logger.Debug("failed to get nonce", "error", err.Error()) return false } txFactory := tx.Factory{} txFactory = txFactory. WithChainID(api.ethAPI.ClientCtx().ChainID). WithKeybase(api.ethAPI.ClientCtx().Keyring). WithTxConfig(api.ethAPI.ClientCtx().TxConfig). WithSequence(uint64(*nonce)). WithGasAdjustment(1.25) _, gas, err := tx.CalculateGas(api.ethAPI.ClientCtx(), txFactory, msg) if err != nil { api.logger.Debug("failed to calculate gas", "error", err.Error()) return false } txFactory = txFactory.WithGas(gas) value := new(big.Int).SetUint64(gas * minGasPriceValue.Ceil().TruncateInt().Uint64()) fees := sdk.Coins{sdk.NewCoin(denom, sdk.NewIntFromBigInt(value))} builder.SetFeeAmount(fees) builder.SetGasLimit(gas) keyInfo, err := api.ethAPI.ClientCtx().Keyring.KeyByAddress(delAddr) if err != nil { api.logger.Debug("failed to get the wallet address using the keyring", "error", err.Error()) return false } if err := tx.Sign(txFactory, keyInfo.GetName(), builder, false); err != nil { api.logger.Debug("failed to sign tx", "error", err.Error()) return false } // Encode transaction by default Tx encoder txEncoder := api.ethAPI.ClientCtx().TxConfig.TxEncoder() txBytes, err := txEncoder(builder.GetTx()) if err != nil { api.logger.Debug("failed to encode eth tx using default encoder", "error", err.Error()) return false } tmHash := common.BytesToHash(tmtypes.Tx(txBytes).Hash()) // Broadcast transaction in sync mode (default) // NOTE: If error is encountered on the node, the broadcast will not return an error syncCtx := api.ethAPI.ClientCtx().WithBroadcastMode(flags.BroadcastSync) rsp, err := syncCtx.BroadcastTx(txBytes) if err != nil || rsp.Code != 0 { if err == nil { err = errors.New(rsp.RawLog) } api.logger.Debug("failed to broadcast tx", "error", err.Error()) return false } api.logger.Debug("broadcasted tx to set miner withdraw address (etherbase)", "hash", tmHash.String()) return true } // SetGasPrice sets the minimum accepted gas price for the miner. // NOTE: this function accepts only integers to have the same interface than go-eth // to use float values, the gas prices must be configured using the configuration file func (api *API) SetGasPrice(gasPrice hexutil.Big) bool { api.logger.Info(api.ctx.Viper.ConfigFileUsed()) appConf, err := config.ParseConfig(api.ctx.Viper) if err != nil { api.logger.Debug("failed to parse config file", "file", api.ctx.Viper.ConfigFileUsed(), "error", err.Error()) return false } var unit string minGasPrices := appConf.GetMinGasPrices() // fetch the base denom from the sdk Config in case it's not currently defined on the node config if len(minGasPrices) == 0 || minGasPrices.Empty() { unit, err = sdk.GetBaseDenom() if err != nil { api.logger.Debug("could not get the denom of smallest unit registered", "error", err.Error()) return false } } else { unit = minGasPrices[0].Denom } c := sdk.NewDecCoin(unit, sdk.NewIntFromBigInt(gasPrice.ToInt())) appConf.SetMinGasPrices(sdk.DecCoins{c}) config.WriteConfigFile(api.ctx.Viper.ConfigFileUsed(), appConf) api.logger.Info("Your configuration file was modified. Please RESTART your node.", "gas-price", c.String()) return true }