forked from cerc-io/ipld-eth-server
123 lines
3.9 KiB
Go
123 lines
3.9 KiB
Go
package geth
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import (
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"errors"
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"math/big"
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"github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/common"
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"golang.org/x/net/context"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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vulcCommon "github.com/vulcanize/vulcanizedb/pkg/geth/converters/common"
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)
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var ErrEmptyHeader = errors.New("empty header returned over RPC")
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type BlockChain struct {
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blockConverter vulcCommon.BlockConverter
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ethClient core.EthClient
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headerConverter vulcCommon.HeaderConverter
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node core.Node
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rpcClient core.RpcClient
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}
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func NewBlockChain(ethClient core.EthClient, rpcClient core.RpcClient, node core.Node, converter vulcCommon.TransactionConverter) *BlockChain {
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return &BlockChain{
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blockConverter: vulcCommon.NewBlockConverter(converter),
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ethClient: ethClient,
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headerConverter: vulcCommon.HeaderConverter{},
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node: node,
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rpcClient: rpcClient,
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}
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}
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func (blockChain *BlockChain) GetBlockByNumber(blockNumber int64) (block core.Block, err error) {
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gethBlock, err := blockChain.ethClient.BlockByNumber(context.Background(), big.NewInt(blockNumber))
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if err != nil {
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return block, err
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}
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return blockChain.blockConverter.ToCoreBlock(gethBlock)
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}
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func (blockChain *BlockChain) GetHeaderByNumber(blockNumber int64) (header core.Header, err error) {
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if blockChain.node.NetworkID == core.KOVAN_NETWORK_ID {
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return blockChain.getPOAHeader(blockNumber)
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}
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return blockChain.getPOWHeader(blockNumber)
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}
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func (blockChain *BlockChain) getPOWHeader(blockNumber int64) (header core.Header, err error) {
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gethHeader, err := blockChain.ethClient.HeaderByNumber(context.Background(), big.NewInt(blockNumber))
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if err != nil {
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return header, err
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}
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return blockChain.headerConverter.Convert(gethHeader)
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}
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func (blockChain *BlockChain) getPOAHeader(blockNumber int64) (header core.Header, err error) {
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var POAHeader core.POAHeader
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blockNumberArg := hexutil.EncodeBig(big.NewInt(blockNumber))
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includeTransactions := false
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err = blockChain.rpcClient.CallContext(context.Background(), &POAHeader, "eth_getBlockByNumber", blockNumberArg, includeTransactions)
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if err != nil {
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return header, err
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}
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if POAHeader.Number == nil {
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return header, ErrEmptyHeader
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}
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return blockChain.headerConverter.Convert(&types.Header{
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ParentHash: POAHeader.ParentHash,
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UncleHash: POAHeader.UncleHash,
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Coinbase: POAHeader.Coinbase,
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Root: POAHeader.Root,
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TxHash: POAHeader.TxHash,
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ReceiptHash: POAHeader.ReceiptHash,
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Bloom: POAHeader.Bloom,
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Difficulty: POAHeader.Difficulty.ToInt(),
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Number: POAHeader.Number.ToInt(),
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GasLimit: uint64(POAHeader.GasLimit),
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GasUsed: uint64(POAHeader.GasUsed),
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Time: POAHeader.Time.ToInt(),
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Extra: POAHeader.Extra,
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})
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}
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func (blockChain *BlockChain) GetLogs(contract core.Contract, startingBlockNumber, endingBlockNumber *big.Int) ([]core.Log, error) {
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if endingBlockNumber == nil {
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endingBlockNumber = startingBlockNumber
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}
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contractAddress := common.HexToAddress(contract.Hash)
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fc := ethereum.FilterQuery{
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FromBlock: startingBlockNumber,
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ToBlock: endingBlockNumber,
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Addresses: []common.Address{contractAddress},
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Topics: nil,
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}
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gethLogs, err := blockChain.GetEthLogsWithCustomQuery(fc)
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if err != nil {
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return []core.Log{}, err
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}
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logs := vulcCommon.ToCoreLogs(gethLogs)
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return logs, nil
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}
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func (blockChain *BlockChain) GetEthLogsWithCustomQuery(query ethereum.FilterQuery) ([]types.Log, error) {
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gethLogs, err := blockChain.ethClient.FilterLogs(context.Background(), query)
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if err != nil {
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return []types.Log{}, err
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}
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return gethLogs, nil
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}
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func (blockChain *BlockChain) LastBlock() *big.Int {
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block, _ := blockChain.ethClient.HeaderByNumber(context.Background(), nil)
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return block.Number
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}
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func (blockChain *BlockChain) Node() core.Node {
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return blockChain.node
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}
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