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eth_newFilter.go
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/
eth_newFilter.go
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package transformer
import (
"context"
"encoding/json"
"github.com/dcb9/go-ethereum/common/hexutil"
"github.com/labstack/echo"
"github.com/revolutionchain/charon/pkg/eth"
"github.com/revolutionchain/charon/pkg/revo"
)
// ProxyETHNewFilter implements ETHProxy
type ProxyETHNewFilter struct {
*revo.Revo
filter *eth.FilterSimulator
}
func (p *ProxyETHNewFilter) Method() string {
return "eth_newFilter"
}
func (p *ProxyETHNewFilter) Request(rawreq *eth.JSONRPCRequest, c echo.Context) (interface{}, eth.JSONRPCError) {
var req eth.NewFilterRequest
if err := json.Unmarshal(rawreq.Params, &req); err != nil {
// TODO: Correct error code?
return nil, eth.NewInvalidParamsError(err.Error())
}
return p.request(c.Request().Context(), &req)
}
func (p *ProxyETHNewFilter) request(ctx context.Context, ethreq *eth.NewFilterRequest) (*eth.NewFilterResponse, eth.JSONRPCError) {
from, err := getBlockNumberByRawParam(ctx, p.Revo, ethreq.FromBlock, true)
if err != nil {
return nil, err
}
to, err := getBlockNumberByRawParam(ctx, p.Revo, ethreq.ToBlock, true)
if err != nil {
return nil, err
}
filter := p.filter.New(eth.NewFilterTy, ethreq)
filter.Data.Store("lastBlockNumber", from.Uint64())
filter.Data.Store("toBlock", to.Uint64())
if len(ethreq.Topics) > 0 {
topics, err := eth.TranslateTopics(ethreq.Topics)
if err != nil {
return nil, eth.NewCallbackError(err.Error())
}
filter.Data.Store("topics", revo.NewSearchLogsTopics(topics))
}
resp := eth.NewFilterResponse(hexutil.EncodeUint64(filter.ID))
return &resp, nil
}