forked from cerc-io/ipld-eth-server
122 lines
4.0 KiB
Go
122 lines
4.0 KiB
Go
// VulcanizeDB
|
|
// Copyright © 2019 Vulcanize
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package retriever
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
"github.com/ethereum/go-ethereum/accounts/abi"
|
|
"github.com/ethereum/go-ethereum/common"
|
|
|
|
"github.com/vulcanize/vulcanizedb/pkg/contract_watcher/shared/contract"
|
|
"github.com/vulcanize/vulcanizedb/pkg/contract_watcher/shared/types"
|
|
"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
|
|
)
|
|
|
|
// AddressRetriever is used to retrieve the addresses associated with a contract
|
|
type AddressRetriever interface {
|
|
RetrieveTokenHolderAddresses(info contract.Contract) (map[common.Address]bool, error)
|
|
}
|
|
|
|
type addressRetriever struct {
|
|
db *postgres.DB
|
|
mode types.Mode
|
|
}
|
|
|
|
// NewAddressRetriever returns a new AddressRetriever
|
|
func NewAddressRetriever(db *postgres.DB, mode types.Mode) AddressRetriever {
|
|
return &addressRetriever{
|
|
db: db,
|
|
mode: mode,
|
|
}
|
|
}
|
|
|
|
// RetrieveTokenHolderAddresses is used to retrieve list of token-holding/contract-related addresses by iterating over available events
|
|
// This generic method should work whether or not the argument/input names of the events meet the expected standard
|
|
// This could be generalized to iterate over ALL events and pull out any address arguments
|
|
func (r *addressRetriever) RetrieveTokenHolderAddresses(info contract.Contract) (map[common.Address]bool, error) {
|
|
addrList := make([]string, 0)
|
|
|
|
_, ok := info.Filters["Transfer"]
|
|
if ok {
|
|
addrs, err := r.retrieveTransferAddresses(info)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
addrList = append(addrList, addrs...)
|
|
}
|
|
|
|
_, ok = info.Filters["Mint"]
|
|
if ok {
|
|
addrs, err := r.retrieveTokenMintees(info)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
addrList = append(addrList, addrs...)
|
|
}
|
|
|
|
contractAddresses := make(map[common.Address]bool)
|
|
for _, addr := range addrList {
|
|
contractAddresses[common.HexToAddress(addr)] = true
|
|
}
|
|
|
|
return contractAddresses, nil
|
|
}
|
|
|
|
func (r *addressRetriever) retrieveTransferAddresses(con contract.Contract) ([]string, error) {
|
|
transferAddrs := make([]string, 0)
|
|
event := con.Events["Transfer"]
|
|
|
|
for _, field := range event.Fields { // Iterate over event fields, finding the ones with address type
|
|
|
|
if field.Type.T == abi.AddressTy { // If they have address type, retrieve those addresses
|
|
addrs := make([]string, 0)
|
|
pgStr := fmt.Sprintf("SELECT %s_ FROM %s_%s.%s_event", strings.ToLower(field.Name), r.mode.String(), strings.ToLower(con.Address), strings.ToLower(event.Name))
|
|
err := r.db.Select(&addrs, pgStr)
|
|
if err != nil {
|
|
return []string{}, err
|
|
}
|
|
|
|
transferAddrs = append(transferAddrs, addrs...) // And append them to the growing list
|
|
}
|
|
}
|
|
|
|
return transferAddrs, nil
|
|
}
|
|
|
|
func (r *addressRetriever) retrieveTokenMintees(con contract.Contract) ([]string, error) {
|
|
mintAddrs := make([]string, 0)
|
|
event := con.Events["Mint"]
|
|
|
|
for _, field := range event.Fields { // Iterate over event fields, finding the ones with address type
|
|
|
|
if field.Type.T == abi.AddressTy { // If they have address type, retrieve those addresses
|
|
addrs := make([]string, 0)
|
|
pgStr := fmt.Sprintf("SELECT %s_ FROM %s_%s.%s_event", strings.ToLower(field.Name), r.mode.String(), strings.ToLower(con.Address), strings.ToLower(event.Name))
|
|
err := r.db.Select(&addrs, pgStr)
|
|
if err != nil {
|
|
return []string{}, err
|
|
}
|
|
|
|
mintAddrs = append(mintAddrs, addrs...) // And append them to the growing list
|
|
}
|
|
}
|
|
|
|
return mintAddrs, nil
|
|
}
|