417b18ec6a
towards generic method polling and reposito;y; config settings to filterevents/methods by account address; refactoring some stuff out of repo and into converter; remove fetcher and instead call blockchain's FetchContractData directly; finishing tests
67 lines
2.5 KiB
Go
67 lines
2.5 KiB
Go
// VulcanizeDB
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// Copyright © 2018 Vulcanize
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package every_block
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import (
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"github.com/vulcanize/vulcanizedb/examples/generic"
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"math/big"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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)
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// Getter serves as a higher level data fetcher that invokes its underlying Fetcher methods for a given contract method
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// Interface definition for a Getter
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type ERC20GetterInterface interface {
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GetTotalSupply(contractAbi, contractAddress string, blockNumber int64) (big.Int, error)
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GetBalance(contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (big.Int, error)
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GetAllowance(contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (big.Int, error)
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GetBlockChain() core.BlockChain
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}
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// Getter struct
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type ERC20Getter struct {
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generic.Fetcher
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}
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// Initializes and returns a Getter with the given blockchain
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func NewGetter(blockChain core.BlockChain) ERC20Getter {
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return ERC20Getter{
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Fetcher: generic.Fetcher{
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BlockChain: blockChain,
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},
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}
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}
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// Public getter methods for calling contract methods
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func (g ERC20Getter) GetTotalSupply(contractAbi, contractAddress string, blockNumber int64) (big.Int, error) {
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return g.Fetcher.FetchBigInt("totalSupply", contractAbi, contractAddress, blockNumber, nil)
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}
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func (g ERC20Getter) GetBalance(contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (big.Int, error) {
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return g.Fetcher.FetchBigInt("balanceOf", contractAbi, contractAddress, blockNumber, methodArgs)
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}
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func (g ERC20Getter) GetAllowance(contractAbi, contractAddress string, blockNumber int64, methodArgs []interface{}) (big.Int, error) {
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return g.Fetcher.FetchBigInt("allowance", contractAbi, contractAddress, blockNumber, methodArgs)
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}
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// Method to retrieve the Getter's blockchain
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func (g ERC20Getter) GetBlockChain() core.BlockChain {
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return g.Fetcher.BlockChain
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}
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