ipld-eth-server/examples/mocks/fetcher.go

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// VulcanizeDB
// Copyright © 2018 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 mocks
import (
"errors"
"math/big"
"reflect"
"github.com/ethereum/go-ethereum/common"
"github.com/vulcanize/vulcanizedb/pkg/core"
)
type Fetcher struct {
ContractAddress string
Abi string
FetchedBlocks []int64
BlockChain core.BlockChain
supply big.Int
balance map[string]*big.Int
allowance map[string]map[string]*big.Int
owner common.Address
stopped bool
stringName string
hashName common.Hash
stringSymbol string
hashSymbol common.Hash
}
func (f *Fetcher) SetSupply(supply string) {
f.supply.SetString(supply, 10)
}
func (f Fetcher) GetBlockChain() core.BlockChain {
return f.BlockChain
}
func (f *Fetcher) FetchBigInt(method, contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (big.Int, error) {
f.Abi = contractAbi
f.ContractAddress = contractAddress
f.FetchedBlocks = append(f.FetchedBlocks, blockNumber)
accumulator := big.NewInt(1)
if method == "totalSupply" {
f.supply.Add(&f.supply, accumulator)
return f.supply, nil
}
if method == "balanceOf" {
rfl := reflect.ValueOf(methodArgs[0])
tokenHolderAddr := rfl.Interface().(string)
pnt := f.balance[tokenHolderAddr]
f.balance[tokenHolderAddr].Add(pnt, accumulator)
return *f.balance[tokenHolderAddr], nil
}
if method == "allowance" {
rfl1 := reflect.ValueOf(methodArgs[0])
rfl2 := reflect.ValueOf(methodArgs[1])
tokenHolderAddr := rfl1.Interface().(string)
spenderAddr := rfl2.Interface().(string)
pnt := f.allowance[tokenHolderAddr][spenderAddr]
f.allowance[tokenHolderAddr][spenderAddr].Add(pnt, accumulator)
return *f.allowance[tokenHolderAddr][spenderAddr], nil
}
return *big.NewInt(0), errors.New("invalid method argument")
}
func (f *Fetcher) FetchBool(method, contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (bool, error) {
f.Abi = contractAbi
f.ContractAddress = contractAddress
f.FetchedBlocks = append(f.FetchedBlocks, blockNumber)
b := true
if method == "stopped" {
f.stopped = b
return f.stopped, nil
}
return false, errors.New("invalid method argument")
}
func (f *Fetcher) FetchAddress(method, contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (common.Address, error) {
f.Abi = contractAbi
f.ContractAddress = contractAddress
f.FetchedBlocks = append(f.FetchedBlocks, blockNumber)
adr := common.StringToAddress("test_address")
if method == "owner" {
f.owner = adr
return f.owner, nil
}
return common.StringToAddress(""), errors.New("invalid method argument")
}
func (f *Fetcher) FetchString(method, contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (string, error) {
f.Abi = contractAbi
f.ContractAddress = contractAddress
f.FetchedBlocks = append(f.FetchedBlocks, blockNumber)
if method == "name" {
f.stringName = "test_name"
return f.stringName, nil
}
if method == "symbol" {
f.stringSymbol = "test_symbol"
return f.stringSymbol, nil
}
return "", errors.New("invalid method argument")
}
func (f *Fetcher) FetchHash(method, contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (common.Hash, error) {
f.Abi = contractAbi
f.ContractAddress = contractAddress
f.FetchedBlocks = append(f.FetchedBlocks, blockNumber)
if method == "name" {
f.hashName = common.StringToHash("test_name")
return f.hashName, nil
}
if method == "symbol" {
f.hashSymbol = common.StringToHash("test_symbol")
return f.hashSymbol, nil
}
return common.StringToHash(""), errors.New("invalid method argument")
}