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Implement block tags (#106)

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* Implemented tm/ethermint specific block tags

* Fix edge case for block query
This commit is contained in:
Austin Abell 2019-09-24 17:38:58 -04:00 committed by GitHub
parent d1900826a0
commit 9383c743dd
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 80 additions and 12 deletions
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30
rpc/eth_api.go
View File

@ -17,7 +17,6 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
"github.com/cosmos/cosmos-sdk/client/context"
"github.com/cosmos/cosmos-sdk/client/flags"
@ -113,7 +112,7 @@ func (e *PublicEthAPI) BlockNumber() (hexutil.Uint64, error) {
}
// GetBalance returns the provided account's balance up to the provided block number.
func (e *PublicEthAPI) GetBalance(address common.Address, blockNum rpc.BlockNumber) (*hexutil.Big, error) {
func (e *PublicEthAPI) GetBalance(address common.Address, blockNum BlockNumber) (*hexutil.Big, error) {
ctx := e.cliCtx.WithHeight(blockNum.Int64())
res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/balance/%s", types.ModuleName, address), nil)
if err != nil {
@ -127,7 +126,7 @@ func (e *PublicEthAPI) GetBalance(address common.Address, blockNum rpc.BlockNumb
}
// GetStorageAt returns the contract storage at the given address, block number, and key.
func (e *PublicEthAPI) GetStorageAt(address common.Address, key string, blockNum rpc.BlockNumber) (hexutil.Bytes, error) {
func (e *PublicEthAPI) GetStorageAt(address common.Address, key string, blockNum BlockNumber) (hexutil.Bytes, error) {
ctx := e.cliCtx.WithHeight(blockNum.Int64())
res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/storage/%s/%s", types.ModuleName, address, key), nil)
if err != nil {
@ -140,7 +139,7 @@ func (e *PublicEthAPI) GetStorageAt(address common.Address, key string, blockNum
}
// GetTransactionCount returns the number of transactions at the given address up to the given block number.
func (e *PublicEthAPI) GetTransactionCount(address common.Address, blockNum rpc.BlockNumber) (*hexutil.Uint64, error) {
func (e *PublicEthAPI) GetTransactionCount(address common.Address, blockNum BlockNumber) (*hexutil.Uint64, error) {
ctx := e.cliCtx.WithHeight(blockNum.Int64())
res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/nonce/%s", types.ModuleName, address), nil)
if err != nil {
@ -158,7 +157,7 @@ func (e *PublicEthAPI) GetBlockTransactionCountByHash(hash common.Hash) hexutil.
}
// GetBlockTransactionCountByNumber returns the number of transactions in the block identified by number.
func (e *PublicEthAPI) GetBlockTransactionCountByNumber(blockNum rpc.BlockNumber) (hexutil.Uint, error) {
func (e *PublicEthAPI) GetBlockTransactionCountByNumber(blockNum BlockNumber) (hexutil.Uint, error) {
node, err := e.cliCtx.GetNode()
if err != nil {
return 0, err
@ -179,12 +178,12 @@ func (e *PublicEthAPI) GetUncleCountByBlockHash(hash common.Hash) hexutil.Uint {
}
// GetUncleCountByBlockNumber returns the number of uncles in the block idenfied by number. Always zero.
func (e *PublicEthAPI) GetUncleCountByBlockNumber(blockNum rpc.BlockNumber) hexutil.Uint {
func (e *PublicEthAPI) GetUncleCountByBlockNumber(blockNum BlockNumber) hexutil.Uint {
return 0
}
// GetCode returns the contract code at the given address and block number.
func (e *PublicEthAPI) GetCode(address common.Address, blockNumber rpc.BlockNumber) (hexutil.Bytes, error) {
func (e *PublicEthAPI) GetCode(address common.Address, blockNumber BlockNumber) (hexutil.Bytes, error) {
ctx := e.cliCtx.WithHeight(blockNumber.Int64())
res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/code/%s", types.ModuleName, address), nil)
if err != nil {
@ -304,12 +303,12 @@ type CallArgs struct {
}
// Call performs a raw contract call.
func (e *PublicEthAPI) Call(args CallArgs, blockNum rpc.BlockNumber) hexutil.Bytes {
func (e *PublicEthAPI) Call(args CallArgs, blockNum BlockNumber) hexutil.Bytes {
return nil
}
// EstimateGas estimates gas usage for the given smart contract call.
func (e *PublicEthAPI) EstimateGas(args CallArgs, blockNum rpc.BlockNumber) hexutil.Uint64 {
func (e *PublicEthAPI) EstimateGas(args CallArgs, blockNum BlockNumber) hexutil.Uint64 {
return 0
}
@ -319,9 +318,16 @@ func (e *PublicEthAPI) GetBlockByHash(hash common.Hash, fullTx bool) map[string]
}
// GetBlockByNumber returns the block identified by number.
func (e *PublicEthAPI) GetBlockByNumber(blockNum rpc.BlockNumber, fullTx bool) (map[string]interface{}, error) {
func (e *PublicEthAPI) GetBlockByNumber(blockNum BlockNumber, fullTx bool) (map[string]interface{}, error) {
value := blockNum.Int64()
block, err := e.cliCtx.Client.Block(&value)
// Remove this check when 0 query is fixed ref: (https://github.com/tendermint/tendermint/issues/4014)
var blkNumPtr *int64
if value != 0 {
blkNumPtr = &value
}
block, err := e.cliCtx.Client.Block(blkNumPtr)
if err != nil {
return nil, err
}
@ -450,7 +456,7 @@ func (e *PublicEthAPI) GetTransactionByBlockHashAndIndex(hash common.Hash, idx h
}
// GetTransactionByBlockNumberAndIndex returns the transaction identified by number and index.
func (e *PublicEthAPI) GetTransactionByBlockNumberAndIndex(blockNumber rpc.BlockNumber, idx hexutil.Uint) *Transaction {
func (e *PublicEthAPI) GetTransactionByBlockNumberAndIndex(blockNumber BlockNumber, idx hexutil.Uint) *Transaction {
return nil
}

62
rpc/types.go Normal file
View File

@ -0,0 +1,62 @@
package rpc
import (
"fmt"
"math"
"strings"
"github.com/ethereum/go-ethereum/common/hexutil"
)
// BlockNumber represents decoding hex string to block values
type BlockNumber int64
const (
// LatestBlockNumber mapping from "latest" to 0 for tm query
LatestBlockNumber = BlockNumber(0)
// EarliestBlockNumber mapping from "earliest" to 1 for tm query (earliest query not supported)
EarliestBlockNumber = BlockNumber(1)
)
// UnmarshalJSON parses the given JSON fragment into a BlockNumber. It supports:
// - "latest", "earliest" or "pending" as string arguments
// - the block number
// Returned errors:
// - an invalid block number error when the given argument isn't a known strings
// - an out of range error when the given block number is either too little or too large
func (bn *BlockNumber) UnmarshalJSON(data []byte) error {
input := strings.TrimSpace(string(data))
if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' {
input = input[1 : len(input)-1]
}
switch input {
case "earliest":
*bn = EarliestBlockNumber
return nil
case "latest":
*bn = LatestBlockNumber
return nil
case "pending":
return fmt.Errorf("pending queries not implemented")
// *bn = PendingBlockNumber
// return nil
}
blckNum, err := hexutil.DecodeUint64(input)
if err != nil {
return err
}
if blckNum > math.MaxInt64 {
return fmt.Errorf("Blocknumber too high")
}
*bn = BlockNumber(blckNum)
return nil
}
// Int64 converts block number to primitive type
func (bn BlockNumber) Int64() int64 {
return (int64)(bn)
}