b6f93e735f
- starting with the totalSupply function - sets contract config on transformer by passing it into the transformer initializer - handles block records with the same number for different nodes for both creating token_supply records, and finding missing blocks
92 lines
2.6 KiB
Go
92 lines
2.6 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 every_block
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import (
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"fmt"
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"github.com/vulcanize/vulcanizedb/pkg/datastore/postgres"
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"log"
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)
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type ERC20RepositoryInterface interface {
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Create(supply TokenSupply) error
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MissingBlocks(startingBlock int64, highestBlock int64) ([]int64, error)
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}
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type TokenSupplyRepository struct {
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*postgres.DB
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}
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type repositoryError struct {
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err string
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msg string
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blockNumber int64
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}
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func (re *repositoryError) Error() string {
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return fmt.Sprintf(re.msg, re.blockNumber, re.err)
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}
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func newRepositoryError(err error, msg string, blockNumber int64) error {
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e := repositoryError{err.Error(), msg, blockNumber}
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log.Println(e.Error())
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return &e
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}
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const (
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GetBlockError = "Error fetching block number %d: %s"
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InsertTokenSupplyError = "Error inserting token_supply for block number %d: %s"
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MissingBlockError = "Error finding missing token_supply records starting at block %d: %s"
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)
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func (tsp *TokenSupplyRepository) Create(supply TokenSupply) error {
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var blockId int
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err := tsp.DB.Get(&blockId, `SELECT id FROM blocks WHERE number = $1 AND eth_node_id = $2`, supply.BlockNumber, tsp.NodeID)
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if err != nil {
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return newRepositoryError(err, GetBlockError, supply.BlockNumber)
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}
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_, err = tsp.DB.Exec(
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`INSERT INTO token_supply (supply, token_address, block_id)
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VALUES($1, $2, $3)`,
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supply.Value, supply.TokenAddress, blockId)
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if err != nil {
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return newRepositoryError(err, InsertTokenSupplyError, supply.BlockNumber)
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}
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return nil
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}
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func (tsp *TokenSupplyRepository) MissingBlocks(startingBlock int64, highestBlock int64) ([]int64, error) {
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blockNumbers := make([]int64, 0)
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err := tsp.DB.Select(
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&blockNumbers,
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`SELECT number FROM BLOCKS
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LEFT JOIN token_supply ON blocks.id = block_id
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WHERE block_id ISNULL
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AND eth_node_id = $1
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AND number >= $2
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AND number <= $3
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LIMIT 20`,
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tsp.NodeID,
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startingBlock,
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highestBlock,
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)
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if err != nil {
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return []int64{}, newRepositoryError(err, MissingBlockError, startingBlock)
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}
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return blockNumbers, err
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}
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