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
123 lines
3.9 KiB
Go
123 lines
3.9 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 dai
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import (
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"github.com/ethereum/go-ethereum/accounts/abi/bind"
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"github.com/ethereum/go-ethereum/common"
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"github.com/vulcanize/vulcanizedb/examples/erc20_watcher/event_triggered"
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"github.com/vulcanize/vulcanizedb/libraries/shared"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/geth"
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"github.com/vulcanize/vulcanizedb/pkg/omni/constants"
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"github.com/vulcanize/vulcanizedb/pkg/omni/helpers"
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)
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// Converter converts a raw event log into its corresponding entity
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// and can subsequently convert the entity into a model
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type ERC20ConverterInterface interface {
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ToTransferEntity(watchedEvent core.WatchedEvent) (*TransferEntity, error)
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ToTransferModel(entity *TransferEntity) *event_triggered.TransferModel
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ToApprovalEntity(watchedEvent core.WatchedEvent) (*ApprovalEntity, error)
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ToApprovalModel(entity *ApprovalEntity) *event_triggered.ApprovalModel
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}
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type ERC20Converter struct {
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config shared.ContractConfig
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}
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func NewERC20Converter(config shared.ContractConfig) (*ERC20Converter, error) {
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var err error
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config.ParsedAbi, err = geth.ParseAbi(config.Abi)
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if err != nil {
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return nil, err
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}
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converter := &ERC20Converter{
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config: config,
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}
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return converter, nil
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}
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func (c ERC20Converter) ToTransferEntity(watchedEvent core.WatchedEvent) (*TransferEntity, error) {
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result := &TransferEntity{}
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contract := bind.NewBoundContract(common.HexToAddress(c.config.Address), c.config.ParsedAbi, nil, nil, nil)
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event := helpers.ConvertToLog(watchedEvent)
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err := contract.UnpackLog(result, constants.TransferEvent.String(), event)
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if err != nil {
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return result, err
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}
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result.TokenName = c.config.Name
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result.TokenAddress = common.HexToAddress(c.config.Address)
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result.Block = watchedEvent.BlockNumber
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result.TxHash = watchedEvent.TxHash
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return result, nil
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}
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func (c ERC20Converter) ToTransferModel(entity *TransferEntity) *event_triggered.TransferModel {
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to := entity.Dst.String()
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from := entity.Src.String()
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tokens := entity.Wad.String()
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return &event_triggered.TransferModel{
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TokenName: c.config.Name,
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TokenAddress: c.config.Address,
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To: to,
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From: from,
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Tokens: tokens,
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Block: entity.Block,
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TxHash: entity.TxHash,
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}
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}
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func (c ERC20Converter) ToApprovalEntity(watchedEvent core.WatchedEvent) (*ApprovalEntity, error) {
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result := &ApprovalEntity{}
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contract := bind.NewBoundContract(common.HexToAddress(c.config.Address), c.config.ParsedAbi, nil, nil, nil)
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event := helpers.ConvertToLog(watchedEvent)
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err := contract.UnpackLog(result, constants.ApprovalEvent.String(), event)
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if err != nil {
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return result, err
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}
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result.TokenName = c.config.Name
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result.TokenAddress = common.HexToAddress(c.config.Address)
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result.Block = watchedEvent.BlockNumber
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result.TxHash = watchedEvent.TxHash
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return result, nil
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}
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func (c ERC20Converter) ToApprovalModel(entity *ApprovalEntity) *event_triggered.ApprovalModel {
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tokenOwner := entity.Src.String()
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spender := entity.Guy.String()
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tokens := entity.Wad.String()
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return &event_triggered.ApprovalModel{
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TokenName: c.config.Name,
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TokenAddress: c.config.Address,
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Owner: tokenOwner,
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Spender: spender,
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Tokens: tokens,
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Block: entity.Block,
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TxHash: entity.TxHash,
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}
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}
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