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|
package api
import (
"strings"
"fmt"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/xeth"
"github.com/ethereum/go-ethereum/rpc/shared"
)
const (
EthApiName = "eth"
)
// Parse a comma separated API string to individual api's
func ParseApiString(apistr string, codec codec.Codec, xeth *xeth.XEth, eth *eth.Ethereum) ([]EthereumApi, error) {
if len(strings.TrimSpace(apistr)) == 0 {
return nil, fmt.Errorf("Empty apistr provided")
}
names := strings.Split(apistr, ",")
apis := make([]EthereumApi, len(names))
for i, name := range names {
switch strings.ToLower(strings.TrimSpace(name)) {
case EthApiName:
apis[i] = NewEthApi(xeth, codec)
default:
return nil, fmt.Errorf("Unknown API '%s'", name)
}
}
return apis, nil
}
// combines multiple API's
type mergedApi struct {
apis map[string]EthereumApi
}
// create new merged api instance
func newMergedApi(apis ...EthereumApi) *mergedApi {
mergedApi := new(mergedApi)
mergedApi.apis = make(map[string]EthereumApi)
for _, api := range apis {
for _, method := range api.Methods() {
mergedApi.apis[method] = api
}
}
return mergedApi
}
// Supported RPC methods
func (self *mergedApi) Methods() []string {
all := make([]string, len(self.apis))
for method, _ := range self.apis {
all = append(all, method)
}
return all
}
// Call the correct API's Execute method for the given request
func (self *mergedApi) Execute(req *shared.Request) (interface{}, error) {
if api, found := self.apis[req.Method]; found {
return api.Execute(req)
}
return nil, shared.NewNotImplementedError(req.Method)
}
// Merge multiple API's to a single API instance
func Merge(apis ...EthereumApi) EthereumApi {
return newMergedApi(apis...)
}
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