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Backfill/listen for contract logs (#113)

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This commit is contained in:
Matt K
2017-12-22 11:42:35 -06:00
committed by GitHub
parent a786241c8c
commit 7e5e12f488
7 changed files with 57 additions and 33 deletions
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pkg/core/blockchain.go
+1 -1
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@@ -11,5 +11,5 @@ type Blockchain interface {
StopListening()
GetAttributes(contract Contract) (ContractAttributes, error)
GetAttribute(contract Contract, attributeName string, blockNumber *big.Int) (interface{}, error)
GetLogs(contract Contract, blockNumber *big.Int) ([]Log, error)
GetLogs(contract Contract, startingBlockNumber *big.Int, endingBlockNumber *big.Int) ([]Log, error)
}
pkg/fakes/blockchain.go
+1 -1
View File
@@ -27,7 +27,7 @@ func (blockchain *Blockchain) LastBlock() *big.Int {
return big.NewInt(max)
}
func (blockchain *Blockchain) GetLogs(contract core.Contract, blockNumber *big.Int) ([]core.Log, error) {
func (blockchain *Blockchain) GetLogs(contract core.Contract, startingBlock *big.Int, endingBlock *big.Int) ([]core.Log, error) {
return blockchain.logs[contract.Hash], nil
}
pkg/geth/geth_blockchain.go
+5 -5
View File
@@ -23,14 +23,14 @@ type GethBlockchain struct {
node core.Node
}
func (blockchain *GethBlockchain) GetLogs(contract core.Contract, blockNumber *big.Int) ([]core.Log, error) {
if blockNumber == nil {
blockNumber = blockchain.LastBlock()
func (blockchain *GethBlockchain) GetLogs(contract core.Contract, startingBlockNumber *big.Int, endingBlockNumber *big.Int) ([]core.Log, error) {
if endingBlockNumber == nil {
endingBlockNumber = startingBlockNumber
}
contractAddress := common.HexToAddress(contract.Hash)
fc := ethereum.FilterQuery{
FromBlock: blockNumber,
ToBlock: blockNumber,
FromBlock: startingBlockNumber,
ToBlock: endingBlockNumber,
Addresses: []common.Address{contractAddress},
}
gethLogs, err := blockchain.client.FilterLogs(context.Background(), fc)