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rpc: refactor backend package (evmos#418)
* backend refractor * Revert init file changes * fix linter issues * Update ethereum/rpc/namespaces/personal/api.go Co-authored-by: Federico Kunze Küllmer <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| package backend | ||
|
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||
| import ( | ||
| "bytes" | ||
| "errors" | ||
| "math/big" | ||
|
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| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| authtypes "github.com/cosmos/cosmos-sdk/x/auth/types" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/tendermint/tendermint/libs/log" | ||
|
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| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| "github.com/tharsis/ethermint/ethereum/rpc/types" | ||
| ethermint "github.com/tharsis/ethermint/types" | ||
| evmtypes "github.com/tharsis/ethermint/x/evm/types" | ||
| ) | ||
|
|
||
| // setTxDefaults populates tx message with default values in case they are not | ||
| // provided on the args | ||
| func (e *EVMBackend) setTxDefaults(args types.SendTxArgs) (types.SendTxArgs, error) { | ||
|
|
||
| if args.GasPrice == nil { | ||
| // TODO: Change to either: | ||
| // - min gas price from context once available through server/daemon, or | ||
| // - suggest a gas price based on the previous included txs | ||
| args.GasPrice = (*hexutil.Big)(big.NewInt(ethermint.DefaultGasPrice)) | ||
| } | ||
|
|
||
| if args.Nonce == nil { | ||
| // get the nonce from the account retriever | ||
| // ignore error in case tge account doesn't exist yet | ||
| nonce, _ := e.getAccountNonce(args.From, true, 0, e.logger) | ||
| args.Nonce = (*hexutil.Uint64)(&nonce) | ||
| } | ||
|
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||
| if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) { | ||
| return args, errors.New("both 'data' and 'input' are set and not equal. Please use 'input' to pass transaction call data") | ||
| } | ||
|
|
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| if args.To == nil { | ||
| // Contract creation | ||
| var input []byte | ||
| if args.Data != nil { | ||
| input = *args.Data | ||
| } else if args.Input != nil { | ||
| input = *args.Input | ||
| } | ||
|
|
||
| if len(input) == 0 { | ||
| return args, errors.New(`contract creation without any data provided`) | ||
| } | ||
| } | ||
|
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| if args.Gas == nil { | ||
| // For backwards-compatibility reason, we try both input and data | ||
| // but input is preferred. | ||
| input := args.Input | ||
| if input == nil { | ||
| input = args.Data | ||
| } | ||
|
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| callArgs := evmtypes.CallArgs{ | ||
| From: &args.From, // From shouldn't be nil | ||
| To: args.To, | ||
| Gas: args.Gas, | ||
| GasPrice: args.GasPrice, | ||
| Value: args.Value, | ||
| Data: input, | ||
| AccessList: args.AccessList, | ||
| } | ||
| blockNr := types.NewBlockNumber(big.NewInt(0)) | ||
| estimated, err := e.EstimateGas(callArgs, &blockNr) | ||
| if err != nil { | ||
| return args, err | ||
| } | ||
| args.Gas = &estimated | ||
| e.logger.Debug("estimate gas usage automatically", "gas", args.Gas) | ||
| } | ||
|
|
||
| if args.ChainID == nil { | ||
| args.ChainID = (*hexutil.Big)(e.chainID) | ||
| } | ||
|
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||
| return args, nil | ||
| } | ||
|
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| // getAccountNonce returns the account nonce for the given account address. | ||
| // If the pending value is true, it will iterate over the mempool (pending) | ||
| // txs in order to compute and return the pending tx sequence. | ||
| // Todo: include the ability to specify a blockNumber | ||
| func (e *EVMBackend) getAccountNonce(accAddr common.Address, pending bool, height int64, logger log.Logger) (uint64, error) { | ||
| queryClient := authtypes.NewQueryClient(e.clientCtx) | ||
| res, err := queryClient.Account(types.ContextWithHeight(height), &authtypes.QueryAccountRequest{Address: sdk.AccAddress(accAddr.Bytes()).String()}) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| var acc authtypes.AccountI | ||
| if err := e.clientCtx.InterfaceRegistry.UnpackAny(res.Account, &acc); err != nil { | ||
| return 0, err | ||
| } | ||
|
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| nonce := acc.GetSequence() | ||
|
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||
| if !pending { | ||
| return nonce, nil | ||
| } | ||
|
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| // the account retriever doesn't include the uncommitted transactions on the nonce so we need to | ||
| // to manually add them. | ||
| pendingTxs, err := e.PendingTransactions() | ||
| if err != nil { | ||
| logger.Error("failed to fetch pending transactions", "error", err.Error()) | ||
| return nonce, nil | ||
| } | ||
|
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||
| // add the uncommitted txs to the nonce counter | ||
| // only supports `MsgEthereumTx` style tx | ||
| for _, tx := range pendingTxs { | ||
| msg, err := evmtypes.UnwrapEthereumMsg(tx) | ||
| if err != nil { | ||
| // not ethereum tx | ||
| continue | ||
| } | ||
|
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| sender, err := msg.GetSender(e.chainID) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| if sender == accAddr { | ||
| nonce++ | ||
| } | ||
| } | ||
|
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||
| return nonce, nil | ||
| } |
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