929 Commits (1715dfcc73da2203ce988ca82ea2f1511dd20ab8)

Author	SHA1	Message	Date
Luke Imhoff	25598e4b7b	Document Explorer.Chain.SmartContract ... Fixes #1342 Document `t:Explorer.Chain.SmartContract.t/0` to clarify difference between `t:Explorer.Chain.SmartContract.t/0` `contract_source_code` and `t:Explorer.Chain.Address.t/0` `contract_code`. Include Solidity ABI Spec docs so domain knowledge is available with the source.	6 years ago
Ayrat Badykov	fbbdf78804	do not index internal transactions with simple token transfers ... 0xa9059cbb - signature of the transfer(address,uint256) function from the ERC-20 token specification. Although transaction input data can be faked we use this heuristics to filter simple token transfer internal transactions from indexing because they slow down realtime fetcher	6 years ago
zachdaniel	e3c4703a99	fixup! fix: poll on import completion and only new blocks	6 years ago
Luke Imhoff	4556ee2c01	Fix tests of transactions on non-consensus blocks ... Tests for BlockTransactionController mistakenly simulated transactions on non-consensus blocks by making the `transaction.block` `consensus` `false`, but this is unrealistic - the importing only sets the consensus block to `transaction.block` and non-consensus blocks show up as `transaction.transaction_forks` `transaction_fork.uncle`. To prevent this from happening again, `Explorer.Factory.with_block` now checks the `block` has `consensus: true`. With this setup fixed, the tests needed to be updated to show that *no* _transactions_ would be shown for non-consensus blocks (because there are only transactions forks) and whether the non-consensus blocks showed as "above tip" only had to do with the number being above the consensus number and not to do with it being non-consensus. Floki selectors are used to improve error messages when messages are unexpected.	6 years ago
Luke Imhoff	57808d6b23	Separate usage of max consensus block number and block height ... The block height should be used when calculating confirmations while the max consensus block number when a block number is needed and you want to tell if the chain is empty or only the genesis block is available. The block height is 0 if there are no blocks or if there is only the genesis block.	6 years ago
Luke Imhoff	cb7bc384e8	Calculate indexed ratio in SQL ... By calculating the indexed ratio in SQL, we only have 1 round trip to the database instead of 1 to get the max and 1 to get the min.	6 years ago
Luke Imhoff	083e5d3278	Ensure min and max block number is for consensus blocks ... Adding `WHERE consensus = true` both fixes the bug that `min_block_number` and `max_block_number` were including non-consensus blocks, but it also makes the query faster because there is an index for consensus blocks. Times from Eth Mainnet production: ``` ether=> SELECT min(b0."number") FROM "blocks" AS b0; min ----- 0 (1 row) Time: 414.218 ms ether=> EXPLAIN SELECT min(b0."number") FROM "blocks" AS b0; QUERY PLAN ----------------------------------------------------------------------------------------------- Finalize Aggregate (cost=223454.95..223454.96 rows=1 width=8) -> Gather (cost=223454.73..223454.95 rows=2 width=8) Workers Planned: 2 -> Partial Aggregate (cost=222454.73..222454.74 rows=1 width=8) -> Parallel Seq Scan on blocks b0 (cost=0.00..215051.99 rows=2961099 width=8) (5 rows) Time: 1.040 ms ether=> EXPLAIN SELECT min(b0."number") FROM "blocks" AS b0 WHERE b0.consensus = true; QUERY PLAN ----------------------------------------------------------------------------------------------------------------------------- Result (cost=0.45..0.46 rows=1 width=8) InitPlan 1 (returns $0) -> Limit (cost=0.43..0.45 rows=1 width=8) -> Index Only Scan using one_consensus_block_at_height on blocks b0 (cost=0.43..158050.90 rows=7045520 width=8) Index Cond: (number IS NOT NULL) (5 rows) Time: 3.350 ms ether=> SELECT min(b0."number") FROM "blocks" AS b0 WHERE b0.consensus = true; min ----- 0 (1 row) Time: 1.059 ms ```	6 years ago
Luke Imhoff	8718ca4069	Update address_current_token_balances and address_token_balances for reorgs ... Fixes #1320 1. Delete any `address_token_balances` with matching consensus block number. 2. Delete any `address_current_token_balances` with matching consensus block number. 3. Derive `address_current_token_balances` for any deleted in (2).	6 years ago
Luke Imhoff	f016475f1d	Order derive_tranactions_forks SELECT to match transaction inserts ... Fixes #1311 Prevent deadlocks due to order in the `SELECT transaction` for `Explorer.Chain.Import.Runner.Blocks.derived_transaction_forks` differing from order in `Explorer.Chain.Import.Runner.Transactions.insert` by sorting both by hash ascending.	6 years ago
Luke Imhoff	75376f43e3	Delete block_rewards for non-consensus or old consensus blocks ... Fixes #1308 1. If a block is non-consensus delete rewards for its hash as the hash should no longer have rewards. 2. If a block is consensus delete rewards for its number as rewards currently in the database were from before a reorg.	6 years ago
Luke Imhoff	aab51cf2f4	Restrict Explorer.Chain.Block.get_blocks_without_reward to consensus ... Fixes #1310	6 years ago
zachdaniel	1c77ef0e19	feat: render block time with up to one decimal point of accuracy	6 years ago
Luke Imhoff	5524a49725	Don't fetch internal transactions for simple token transfers ... Resolves #1303 Don't fetch internal transactions for transactions that have token transfers from the logs if the status is `:ok` and the transaction did not create a contract.	6 years ago
Luke Imhoff	40004fdb4b	Rename file to match naming convention	6 years ago
Luke Imhoff	a571a4edb3	Don't fetch or import internal transactions for value transfers ... Fixes #1287 For simple value transfers, the UI already doesn't show the redundant single internal transaction, but we can speed up the indexing by determine the internal transactions aren't needed when the transacion is a successful simple value transfer as determined by status being `:ok` and the input being empty (`0x`).	6 years ago
zachdaniel	b02383a80b	feat: store average block time in a genserver	6 years ago
Luke Imhoff	df8673242e	Order current token balance inserts to prevent deadlock ... Fixes #1295	6 years ago
Luke Imhoff	b69d437b06	Include block number when ordering token balances ... The block number matters for ordering as a token can be updated for an address multiple times across different blocks in one insert.	6 years ago
Luke Imhoff	6165f6757f	Move uniquifiation of address current token balances out of runner ... For all other runners, it is the responsibility of the caller to ensure unique entries. This ensures that the least amount of data as possible is sent to `Explorer.Chain.Import.all`, which speeds up the whole import process.	6 years ago
Luke Imhoff	8ffbe6418d	Use COUNT(*) of current_token_balances to eliminate TokenHoldersCounter ... `TokenHolderCounter` was created 20 days before the current_token_balances table and wasn't redesigned to make use of `current_token_balances`. With `current_token_balances` in place, the problematic query over `token_balances` that necessitated `TokenHoldersCounter` can use `current_token_balances`. Using `current_token_balances` with `COUNT(*)` is when tested on eth60-test, the new query for `Explorer.Chain.count_token_holders_from_token_hash/1` still took 11 seconds. ``` sql> SELECT COUNT(*) FROM address_current_token_balances WHERE token_contract_address_hash = decode('f230b790e05390fc8295f4d3f60332c93bed42e2', 'hex') AND address_hash != decode('0000000000000000000000000000000000000000', 'hex') AND value > 0 [2019-01-02 08:04:26] 1 row retrieved starting from 1 in 11 s 554 ms (execution: 11 s 463 ms, fetching: 91 ms) ``` Using `EXPLAIN`, it should this was using a full sequential scan of table, so like in the other `COUNT(*)` optimizations PRs, I added an index to enable an index scan. Running the migration to add the index took only 1 minute on eth60-test: ``` 2019-01-02T08:40:16.220 application=ecto_sql [info] == Running 20190102141900 Explorer.Repo.Migrations.IndexCurrentTokenHolders.change/0 forward 2019-01-02T08:40:16.220 application=ecto_sql [info] create index address_current_token_balances_token_contract_address_hash_index 2019-01-02T08:41:13.746 application=ecto_sql [info] == Migrated 20190102141900 in 57.5s ``` After the migration ran, Index Scan was enabled and the query took only 837ms. ``` sql> SELECT COUNT(*) FROM address_current_token_balances WHERE token_contract_address_hash = decode('f230b790e05390fc8295f4d3f60332c93bed42e2', 'hex') AND address_hash != decode('0000000000000000000000000000000000000000', 'hex') AND value > 0 [2019-01-02 08:42:44] 1 row retrieved starting from 1 in 866 ms (execution: 837 ms, fetching: 29 ms) ```	6 years ago
Gustavo Santos Ferreira	34dd660c1f	deal with coin market cap's pagination situation	6 years ago
fvictorio	616658adbf	Show token price in USD	6 years ago
William Sanches	57fab18a39	Add realtime to emission rewards	6 years ago
William Sanches	590f81004c	Add emission tiles to address transactions	6 years ago
Amanda Sposito	bf46d3ee51	Add BlockScoutWeb.RealtimeEventHandler and Explorer.Chain.Events.Publisher ... * Separate EventHandler according to broadcast_type event, so the frontend realtime does not need to ignore the catchup events.	6 years ago
Gustavo Santos Ferreira	af8b92aa0d	new queries for blocks and transactions	6 years ago
Gustavo Santos Ferreira	f139317f88	multiply two wei values	6 years ago
Luke Imhoff	903d322553	Use index and COUNT(*) for address_to_validation_count ... BlockValidationCounter is not needed once the query is switched to `COUNT(*)` and an index is added for `blocks.miner_hash`. Creating the index on eth60-test took only 12 seconds. ``` 2018-12-21T08:32:46.375 application=ecto_sql [info] == Running 20181221143000 Explorer.Repo.Migrations.CreateBlocksMinerHashIndex.change/0 forward 2018-12-21T08:32:46.375 application=ecto_sql [info] create index blocks_miner_hash_index 2018-12-21T08:32:59.211 application=ecto_sql [info] == Migrated 20181221143000 in 12.8s ``` Before the index both `COUNT(*)` and `COUNT(hash)` (the old usage before 76fc8e0377 in 92f99cac22) take > 800ms, which would have a noticable impact on the UI. ``` sql> SELECT COUNT(*) FROM blocks WHERE blocks.miner_hash = ( SELECT blocks.miner_hash FROM blocks LIMIT 1 ) [2018-12-21 08:27:43] 1 row retrieved starting from 1 in 906 ms (execution: 889 ms, fetching: 17 ms) sql> SELECT COUNT(hash) FROM blocks WHERE blocks.miner_hash = ( SELECT blocks.miner_hash FROM blocks LIMIT 1 ) [2018-12-21 08:28:04] 1 row retrieved starting from 1 in 819 ms (execution: 811 ms, fetching: 8 ms) ``` After the index both queries benefited because `COUNT(hash)` was able to use Bitmap Index Scan, but `COUNT(*)` was much better using a normal Index Scan: ``` sql> SELECT COUNT(hash) FROM blocks WHERE blocks.miner_hash = ( SELECT blocks.miner_hash FROM blocks LIMIT 1 ) [2018-12-21 08:33:43] 1 row retrieved starting from 1 in 776 ms (execution: 768 ms, fetching: 8 ms) sql> SELECT COUNT(*) FROM blocks WHERE blocks.miner_hash = ( SELECT blocks.miner_hash FROM blocks LIMIT 1 ) [2018-12-21 08:33:55] 1 row retrieved starting from 1 in 130 ms (execution: 120 ms, fetching: 10 ms) ``` The `SELECT` to get a miner_hash takes 54ms alone, so the `COUNT(*)` takes ~70ms, but EXPLAINs take just as long so ~50ms is my latency to eth60-test, meaning the `SELECT COUNT(*)` takes about 20ms plus latency.	6 years ago
Luke Imhoff	f67241cfc0	Use COUNT(*) for count_token_transfers_from_token_hash ... By using `COUNT(*)` instead of `COUNT(column)`, Postgres optimizes the count to use the row count recorded in the index. The ETS counter appeared necessary because in 95de1ebcb0, `COUNT(id)` was being used (95de1ebcb0/apps/explorer/lib/explorer/chain/token_transfer.ex (L138)), which seems reasonable in Ecto as you need some column to count, but in Postgres, it is more efficient to count everything with `*` as it implies "count rows". `COUNT(column)` requires Postgres check if any of the values are `NULL` and it does not optimize the query even if the column is `NOT NULL` in most cases like when the `id` was used. Testing on eth60-test database, `COUNT(*)` took 62ms while `COUNT(column)` (in this case `amount` since the table no longer has `id) took 16s demonstrating the vast speed improvement of `*` counting. ``` sql> SELECT COUNT(*) FROM token_transfers WHERE token_contract_address_hash = ( SELECT token_contract_address_hash FROM token_transfers LIMIT 1) [2018-12-21 07:51:02] 1 row retrieved starting from 1 in 70 ms (execution: 62 ms, fetching: 8 ms) sql> SELECT COUNT(amount) FROM token_transfers WHERE token_contract_address_hash = ( SELECT token_contract_address_hash FROM token_transfers LIMIT 1) [2018-12-21 07:51:43] 1 row retrieved starting from 1 in 16 s 862 ms (execution: 16 s 855 ms, fetching: 7 ms) ```	6 years ago
Luke Imhoff	2a4223c2c6	Allow block numbers to exceed missing block search range by > 1 ... Fixes #1266 Issue #1266 was triggered when the recorded block number exceeded the reported max block number as can happen temporary when the node that gives the latest block number is farther behind than the node that gave the block data. The previous `Explorer.Chain.missing_block_number_ranges` query added in #1230 did not account for the max block number in the database exceeding the range max. When this occurs, an errant range was produced by the #1230 query because it chose the greatest of the range and the max block when trying to find the end point for the gap search. The testing did not catch #1266 because the doctests only used block numbers that exceeded the search range, by 1 and the bug did not show up until it was 2 or more. The new query is split into 4 subqueries: 1. missing prefix when range min < min(block.number) 2. missing infix when the blocks aren't in the range at all 3. missing suffix when max(block.number) < range max 4. gaps between existent block numbers This version is also more efficient as there is only a single sort of the outer `UNION ALL` result instead of a sort of real blocks and fake end points for the range. It is able to move the `UNION ALL` up because it doesn't need to produce fake end cap blocks. This positioning of the `UNION ALL` and `ORDER BY` on the outer most query allows for all 4 queries to use `one_consensus_block_at_height` index and either a limit (for `min`/`max`) or a window aggregate (for `lag`), which has minimal, single row cost.	6 years ago
Luke Imhoff	1579db1aec	Add ON CONFLICT to derive_transaction_forks ... Fixes #1262	6 years ago
Luke Imhoff	81179f9459	Use :timer functions to make timeout values clearer	6 years ago
Luke Imhoff	1a17658866	Increase DB transaction timeout to 4 minutes ... This prevents DB timeouts against Eth Mainnet for stretches of 20 minutes when testing with block concurrency of 5 and block batch size of 5 while production is simultaneously running at 12x12.	6 years ago
Luke Imhoff	04d3644839	Use where clause for on_conflict to only write tuples that are different ... When the `ON CONFLICT` clause is triggered, it still causes a new tuple in Postgres to be written even if the value of all the columns is the same. Making a new tuple means that the table needs to be vacuumed sooner and leads to more work and churn for the database and its storage. But, there is a way to prevent this unnecessary churn: Postgres supports a `WHERE` clause on the `ON CONFLICT DO UPDATE` that allows us to not write a new row if the data would be the same. While testing this, it already showed it can prevent unnecessary updates to the `tokens` table when the MetadataUpdater is running.	6 years ago
Amanda Sposito	de3520667f	Add reward value of a block in the tile and overview section	6 years ago
Luke Imhoff	8e1bfc0589	Convert DBConnection.ConnectionError tcp recv: closed to {:error, :timeout} ... Resolves #1251	6 years ago
William Sanches	2b48235898	Remove opcodes from CodeCompiler ... Really old versions of solidity compiler, e.g. v0.1.3, have different output schemas. This data was never used by our application, so instead of having to deal with different outputs, we just don't try to get this item anymore.	6 years ago
William Sanches	c1e582e85c	Add better error messages	6 years ago
William Sanches	3ff530c22e	Update JS solidity compiler ... The old lib would produce errors with solidity versions newer than v0.5.0. This will allow more recent codes to be verified.	6 years ago
Gustavo Santos Ferreira	f2cbf37200	genserver that executes validator data imports every 24 hours	6 years ago
Gustavo Santos Ferreira	ebf0aa6860	module that imports validators metadata into the DataBase	6 years ago
Gustavo Santos Ferreira	be397fbd7b	retriever module that queries the contracts to generate validator metadata	6 years ago
Gustavo Santos Ferreira	d563a2568a	add metadata column to address_names	6 years ago
fvictorio	cd51e7cb29	Use address_current_token_balances in address tokens tab	6 years ago
Luke Imhoff	d36dac0dc2	Import stages ... Stages will be between Import and the Import.Runner. Unlike Runners, which use 1 common Ecto.Multi, a Stage can produce 1 or more independent Ecto.Multi that will run in separate transactions. This allows addresses to be chunked into separate transactions, which releases the locks between transactions unlike the INSERT-level chunking that was all in 1 transaction.	6 years ago
Luke Imhoff	29d945b9b6	Use reraise and __STACKTRACE__ to reraise safe_insert_all errors ... Fixes #1238 `reraise` is the current accepted idiom for reraising, not `raise` alone as it preserves the original stacktrace.	6 years ago
Luke Imhoff	75f9af7f56	Use lag windowing function to reduce missing block time ... Ecto 3.0 gets us easy access to partitions and the windowing function `lag`. `lag` is able to keep track of the previous row without a self join. Importantly, the new query with `lag` and no more `generate_series` completes in ~2.5 seconds on Ethereum mainnet using `:timer.tc(Explorer.Chain, :missing_block_number_ranges, [6889126..0])` on ETH Mainnet Test DB 40 while the old version doesn't return after 5+ minutes. I've heavily commented the new version of the query since this took awhile to figure out and most importantly finding the proper terminology: "gaps and islands" was key to find the starting query using `lag`. The query in SQL is as follows: ```sql SELECT island.last_number + 1, island.next_number - 1 FROM ( SELECT lag(land.number) OVER "w" AS last_number, land.number AS next_number FROM ( SELECT blocks.number AS number FROM blocks WHERE blocks.consensus = TRUE UNION ALL ( SELECT LEAST(min_blocks.number, before_range_min) FROM ( SELECT min(blocks.number) AS number FROM blocks WHERE blocks.consensus = TRUE) ) AS min_blocks WHERE min_blocks.number IS NULL OR min_blocks.number != before_range_min ) UNION ALL ( SELECT GREATEST(max_blocks.number, after_range_max) FROM ( SELECT max(blocks.number) AS number FROM blocks WHERE blocks.consensus = TRUE ) AS max_blocks WHERE max_blocks.number IS NULL OR max_blocks.number != after_range_max ) AS land WINDOW "w" AS (ORDER BY land.number) ) AS islands WHERE islands.last_number != islands.next_number - 1 ORDER BY islands.last_number ```	6 years ago
Luke Imhoff	ea58dad12b	Update to Ecto 3.0	6 years ago
William Sanches	a754a72390	Add block_reward import	6 years ago
William Sanches	23bd2b0049	Rename block_rewards to emission_rewards	6 years ago