ipld-eth-server/examples/generic/event_triggered/tusd/converter.go

119 lines
3.7 KiB
Go

// Copyright 2018 Vulcanize
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package tusd
import (
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
"github.com/vulcanize/vulcanizedb/examples/constants"
"github.com/vulcanize/vulcanizedb/examples/generic/event_triggered"
"github.com/vulcanize/vulcanizedb/examples/generic/helpers"
"github.com/vulcanize/vulcanizedb/libraries/shared"
"github.com/vulcanize/vulcanizedb/pkg/core"
"github.com/vulcanize/vulcanizedb/pkg/geth"
)
// Converter converts a raw event log into its corresponding entity
// and can subsequently convert the entity into a model
type GenericConverterInterface interface {
ToBurnEntity(watchedEvent core.WatchedEvent) (*BurnEntity, error)
ToBurnModel(entity *BurnEntity) *event_triggered.BurnModel
ToMintEntity(watchedEvent core.WatchedEvent) (*MintEntity, error)
ToMintModel(entity *MintEntity) *event_triggered.MintModel
}
type GenericConverter struct {
config shared.ContractConfig
}
func NewGenericConverter(config shared.ContractConfig) (*GenericConverter, error) {
var err error
config.ParsedAbi, err = geth.ParseAbi(config.Abi)
if err != nil {
return nil, err
}
converter := &GenericConverter{
config: config,
}
return converter, nil
}
func (c GenericConverter) ToBurnEntity(watchedEvent core.WatchedEvent) (*BurnEntity, error) {
result := &BurnEntity{}
contract := bind.NewBoundContract(common.HexToAddress(c.config.Address), c.config.ParsedAbi, nil, nil, nil)
event := helpers.ConvertToLog(watchedEvent)
err := contract.UnpackLog(result, constants.BurnEvent.String(), event)
if err != nil {
return result, err
}
result.TokenName = c.config.Name
result.TokenAddress = common.HexToAddress(c.config.Address)
result.Block = watchedEvent.BlockNumber
result.TxHash = watchedEvent.TxHash
return result, nil
}
func (c GenericConverter) ToBurnModel(entity *BurnEntity) *event_triggered.BurnModel {
burner := entity.Burner.String()
tokens := entity.Value.String()
return &event_triggered.BurnModel{
TokenName: c.config.Name,
TokenAddress: c.config.Address,
Burner: burner,
Tokens: tokens,
Block: entity.Block,
TxHash: entity.TxHash,
}
}
func (c GenericConverter) ToMintEntity(watchedEvent core.WatchedEvent) (*MintEntity, error) {
result := &MintEntity{}
contract := bind.NewBoundContract(common.HexToAddress(c.config.Address), c.config.ParsedAbi, nil, nil, nil)
event := helpers.ConvertToLog(watchedEvent)
err := contract.UnpackLog(result, constants.MintEvent.String(), event)
if err != nil {
return result, err
}
result.TokenName = c.config.Name
result.TokenAddress = common.HexToAddress(c.config.Address)
result.Block = watchedEvent.BlockNumber
result.TxHash = watchedEvent.TxHash
return result, nil
}
func (c GenericConverter) ToMintModel(entity *MintEntity) *event_triggered.MintModel {
mintee := entity.To.String()
minter := c.config.Owner
tokens := entity.Amount.String()
return &event_triggered.MintModel{
TokenName: c.config.Name,
TokenAddress: c.config.Address,
Mintee: mintee,
Minter: minter,
Tokens: tokens,
Block: entity.Block,
TxHash: entity.TxHash,
}
}