96 lines
2.7 KiB
Go
96 lines
2.7 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 converter
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import (
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"github.com/ethereum/go-ethereum/accounts/abi"
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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/helpers"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/omni/contract"
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"github.com/vulcanize/vulcanizedb/pkg/omni/types"
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)
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// Converter is used to convert watched event logs to
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// custom logs containing event input name => value maps
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type Converter interface {
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Convert(watchedEvent core.WatchedEvent, event *types.Event) error
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Update(info contract.Contract)
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}
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type converter struct {
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contractInfo contract.Contract
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}
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func NewConverter(info contract.Contract) *converter {
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return &converter{
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contractInfo: info,
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}
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}
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func (c *converter) Update(info contract.Contract) {
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c.contractInfo = info
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}
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// Convert the given watched event log into a types.Log for the given event
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func (c *converter) Convert(watchedEvent core.WatchedEvent, event *types.Event) error {
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contract := bind.NewBoundContract(common.HexToAddress(c.contractInfo.Address), c.contractInfo.ParsedAbi, nil, nil, nil)
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values := make(map[string]interface{})
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for _, field := range event.Fields {
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var i interface{}
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values[field.Name] = i
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switch field.Type.T {
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case abi.StringTy, abi.HashTy, abi.AddressTy:
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field.PgType = "CHARACTER VARYING(66)"
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case abi.IntTy, abi.UintTy:
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field.PgType = "DECIMAL"
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case abi.BoolTy:
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field.PgType = "BOOLEAN"
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case abi.BytesTy, abi.FixedBytesTy:
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field.PgType = "BYTEA"
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case abi.ArrayTy:
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field.PgType = "TEXT[]"
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case abi.FixedPointTy:
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field.PgType = "MONEY" // use shopspring/decimal for fixed point numbers in go and money type in postgres?
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case abi.FunctionTy:
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field.PgType = "TEXT"
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default:
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field.PgType = "TEXT"
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}
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}
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log := helpers.ConvertToLog(watchedEvent)
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err := contract.UnpackLogIntoMap(values, event.Name, log)
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if err != nil {
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return err
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}
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eventLog := types.Log{
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Values: values,
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Block: watchedEvent.BlockNumber,
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Tx: watchedEvent.TxHash,
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}
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event.Logs[watchedEvent.LogID] = eventLog
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return nil
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}
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