110 lines
3.5 KiB
Go
110 lines
3.5 KiB
Go
// Copyright 2018 Vulcanize
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package event_triggered
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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/generic"
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"github.com/vulcanize/vulcanizedb/examples/generic/helpers"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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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) TransferModel
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ToApprovalEntity(watchedEvent core.WatchedEvent) (*ApprovalEntity, error)
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ToApprovalModel(entity ApprovalEntity) ApprovalModel
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}
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type ERC20Converter struct {
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config generic.ContractConfig
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}
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func NewERC20Converter(config generic.ContractConfig) ERC20Converter {
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return ERC20Converter{
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config: config,
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}
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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, "Transfer", 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(transferEntity TransferEntity) TransferModel {
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to := transferEntity.Dst.String()
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from := transferEntity.Src.String()
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tokens := transferEntity.Wad.String()
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block := transferEntity.Block
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tx := transferEntity.TxHash
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return 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: block,
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TxHash: tx,
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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, "Approval", 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(TransferEntity ApprovalEntity) ApprovalModel {
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tokenOwner := TransferEntity.Src.String()
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spender := TransferEntity.Guy.String()
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tokens := TransferEntity.Wad.String()
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block := TransferEntity.Block
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tx := TransferEntity.TxHash
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return 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: block,
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TxHash: tx,
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}
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}
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