203 lines
7.2 KiB
Go
203 lines
7.2 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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// Interface definition for a generic ERC20 token repository
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type ERC20RepositoryInterface interface {
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CreateSupply(supply TokenSupply) error
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CreateBalance(balance TokenBalance) error
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CreateAllowance(allowance TokenAllowance) error
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MissingSupplyBlocks(startingBlock, highestBlock int64, tokenAddress string) ([]int64, error)
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MissingBalanceBlocks(startingBlock, highestBlock int64, tokenAddress, holderAddress string) ([]int64, error)
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MissingAllowanceBlocks(startingBlock, highestBlock int64, tokenAddress, holderAddress, spenderAddress string) ([]int64, error)
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}
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// Generic ERC20 token Repo struct
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type ERC20TokenRepository struct {
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*postgres.DB
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}
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// Repo error
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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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// Repo error method
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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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// Used to create a new Repo error for a given error and fetch method
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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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// Constant error definitions
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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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InsertTokenBalanceError = "Error inserting token_balance for block number %d: %s"
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InsertTokenAllowanceError = "Error inserting token_allowance 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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// Supply methods
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// This method inserts the supply for a given token contract address at a given block height into the token_supply table
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func (tsp *ERC20TokenRepository) CreateSupply(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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// This method returns an array of blocks that are missing a token_supply entry for a given tokenAddress
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func (tsp *ERC20TokenRepository) MissingSupplyBlocks(startingBlock, highestBlock int64, tokenAddress string) ([]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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AND token_address = $1
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WHERE block_id ISNULL
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AND eth_node_id = $2
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AND number >= $3
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AND number <= $4
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LIMIT 20`,
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tokenAddress,
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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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// Balance methods
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// This method inserts the balance for a given token contract address and token owner address at a given block height into the token_balance table
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func (tsp *ERC20TokenRepository) CreateBalance(balance TokenBalance) 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`, balance.BlockNumber, tsp.NodeID)
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if err != nil {
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return newRepositoryError(err, GetBlockError, balance.BlockNumber)
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}
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_, err = tsp.DB.Exec(
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`INSERT INTO token_balance (balance, token_address, block_id, token_holder_address)
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VALUES($1, $2, $3, $4)`,
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balance.Value, balance.TokenAddress, blockId, balance.TokenHolderAddress)
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if err != nil {
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return newRepositoryError(err, InsertTokenBalanceError, balance.BlockNumber)
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}
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return nil
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}
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// This method returns an array of blocks that are missing a token_balance entry for a given token contract address and token owner address
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func (tsp *ERC20TokenRepository) MissingBalanceBlocks(startingBlock, highestBlock int64, tokenAddress, holderAddress string) ([]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_balance ON blocks.id = block_id
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AND token_address = $1
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AND token_holder_address = $2
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WHERE block_id ISNULL
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AND eth_node_id = $3
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AND number >= $4
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AND number <= $5
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LIMIT 20`,
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tokenAddress,
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holderAddress,
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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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// Allowance methods
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// This method inserts the allowance for a given token contract address, token owner address, and token spender address at a given block height into the
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func (tsp *ERC20TokenRepository) CreateAllowance(allowance TokenAllowance) 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`, allowance.BlockNumber, tsp.NodeID)
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if err != nil {
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return newRepositoryError(err, GetBlockError, allowance.BlockNumber)
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}
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_, err = tsp.DB.Exec(
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`INSERT INTO token_allowance (allowance, token_address, block_id, token_holder_address, token_spender_address)
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VALUES($1, $2, $3, $4, $5)`,
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allowance.Value, allowance.TokenAddress, blockId, allowance.TokenHolderAddress, allowance.TokenSpenderAddress)
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if err != nil {
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return newRepositoryError(err, InsertTokenAllowanceError, allowance.BlockNumber)
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}
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return nil
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}
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// This method returns an array of blocks that are missing a token_allowance entry for a given token contract address, token owner address, and token spender address
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func (tsp *ERC20TokenRepository) MissingAllowanceBlocks(startingBlock, highestBlock int64, tokenAddress, holderAddress, spenderAddress string) ([]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_allowance ON blocks.id = block_id
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AND token_address = $1
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AND token_holder_address = $2
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AND token_spender_address = $3
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WHERE block_id ISNULL
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AND eth_node_id = $4
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AND number >= $5
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AND number <= $6
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LIMIT 20`,
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tokenAddress,
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holderAddress,
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spenderAddress,
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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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