Blockbook v0.6.0

A major release bringing Tron network support, ERC-4626 vault enrichment, an ENS resolver, extensive performance, reliability, and security hardening, and a large wave of backend node upgrades.

New Features and Chain Support

• Tron network support (#1273): adds Tron support to Blockbook.
  • Split bandwidth into staked and free fields (#1444): separates Tron account bandwidth into staked and free fields for clearer resource accounting.
  • Tx balance history maps freezing, unfreezing and voting rewards (#1463): correctly maps Tron freeze/unfreeze operations and voting rewards as incoming/outgoing in balance history.
  • Recognize account activation transactions (#1466): adds AccountCreateContract parsing so Tron account-activation transactions are no longer shown as unparsed.
  • Expose staking and voting data in account API (#1467): implements TronStakingInfo in TronAccountExtraData exposing staking and governance data via the account API.
  • Extend account data with total energy and bandwidth (#1547): adds total energy and total bandwidth to TronAccountExtraData.
  • Expose latestWithdrawTime in staking info (#1604): adds latestWithdrawTime parsed from latest_withdraw_time to Tron account staking information.
• Opt-in ERC-4626 vault enrichment for EVM tokens (#1431): adds REST/WS protocols=erc4626 batched vault detection and response enrichment under protocols.erc4626.
• Stateful ERC-4626 persistent cache with multicall batching (#1502): replaces per-request sequential eth_calls with a block-pinned, singleflight-deduped, reorg-safe persistent cache using Multicall3 batch aggregation; eliminates virtually all RPC overhead for vault enrichment.
• ENS resolver (#1289): resolves ENS names in the EVM explorer and API.
• Ethereum Hoodi testnet support (#1328): adds configuration and support for the new Hoodi Ethereum testnet.
• Alternative RPC provider for transaction broadcast (#1264): allows sending transactions to the mempool via an alternative (e.g. MEV-protected/private relay) provider.
  • Initialize alternative providers for EVM chains (#1322).
  • Per-request opt-out flag (#1313): sendTransaction accepts JSON with a disableAlternativeRPC parameter.
  • Use alternative provider URL for simulation and nonce (#1316) and eth_getTransactionCount with pending tag (#1314): keeps nonce/simulation consistent with privately submitted transactions.
  • Scope alternative provider usage (#1330): stops routing eth_call and eth_gasPrice through the alternative provider.
• Unconfirmed balance reporting (#1142): improves unconfirmed balance handling in the API.
• Alternative fee estimation: mempool.space median (#1233): adds a new mempoolspacemedian option for the alternative_estimate_fee setting.
• longTermFeeRate WebSocket endpoint (#1262): exposes a long-term fee rate estimate over WebSocket.
• Return fees lower than 1 sat/vB (#1335): allows sub-1 sat/vB fee estimates to be returned.
• Publish confirmed transactions by address (#1198): WebSocket subscribers can receive confirmed transaction notifications per address.
• Avalanche priority fees (#1376): adds Avalanche priority fees and corrects existing fee values.
• EVM block-gas data for EIP-1559 fee projection (#1586): adds baseFeePerGas, blockGasUsed, and blockGasLimit to subscribeNewBlock notifications so wallets can project EIP-1559 base fees deterministically.
• EVM getContractInfo endpoint (#1477): adds a single-contract lookup endpoint so clients can refresh ERC-4626 vault data and fiat pricing without reloading full accountInfo; unifies protocol enrichment shape between getAccountInfo and getContractInfo (#1480 removes the resulting ContractInfo duplication from API types).
• Basic detail for stakingPools (#1338): adds basic detail level to staking pool responses.
• Method-selector allowlist for rpcCall (#1597): adds ALLOWED_EVM_CALL_METHODS configuration allowing rpcCall to invoke whitelisted 4-byte selectors on any address; runtime-configurable via admin API.
• WebSocket connection caps (#1483): adds per-IP connection limits with configurable trusted-proxy origin detection for more reliable client-IP attribution.
• Rate-limit WebSocket and REST API traffic (#1563): adds application-level abuse protection with per-connection WS message-rate limits, per-client REST request throttling, shared trusted-proxy attribution, and bounded balance-history queries per transport.
• Expose confirmed nonce on address API (#1562): adds the confirmed account nonce to the address API response for EVM chains.
• ERC-4626 support in explorer (#1431, #1502): see above; vault data is also surfaced in the explorer UI.

Performance

• Concurrent internal-data fetching in GetBlock (#1383): runs processEventsForBlock and getInternalDataForBlock concurrently.
• GetBlock no longer unmarshals the same raw JSON twice (#1385).
• Replace per-contract eth_call with multicall for ERC-20 (#1388): batches ERC-20 contract reads through Multicall.
• Faster BTC mempool resync with batching + outpoint cache (#1403): adds optional batch tx fetch with bounded concurrency and a temporary resync outpoint cache to avoid repeated parent lookups.
• Ethereum address-contract indexing micro-optimizations (#1417): adds hot-address LRU/index map to remove O(n) contract scans, bounds cache growth, and improves ERC20 aggregation hot-path overhead.
• AddrContractsCache to speed up indexing (#1323): caches address-contract records during EVM indexing.
• WebSocket/API perf + fiat observability improvements (#1423): batches fiat enrichment with robust fallback reasons, improves client-facing error behavior, and reduces log noise.
• Memory optimizations (#1479): addresses agent-discovered heap-pressure findings, reducing overall memory footprint.
• Skip mempool tx body loading for AccountDetailsBasic (#1499): drops per-tx body fetch for details=basic WebSocket requests; reports unconfirmedTxs from cheap mempool-index length only, saving significant RPC work on mempool-heavy addresses.
• Accumulate address-hotness hits across blocks (#1529): makes the contract-index LRU promotion counter persist across blocks instead of resetting per block, so hot-address detection works on lower-throughput chains too.
• Websocket communication optimizations (#1550): reuses the xpub best-height within a request across derived addresses, adds a WebSocket write-buffer pool, reduces subscription lock hold time, and caches merged confirmed xpub txids for unfiltered paged requests.
• Resolve tx inputs without unpacking full prev-tx records (#1595): reads only the single needed output per input instead of unpacking the entire previous transaction, eliminating quadratic heap allocation on high-fan-in addresses.
• Improve WebSocket GetBlock pagination defaults (#1476): replaces the 1M-transaction default page size with a sane bound matching the REST interface.

Reliability and Correctness

• Fix initialization of Ethereum RPC (#1307, #1321).
• Fix EthereumTypeGetNonce (#1327).
• Improved error handling and logging (#1326): better readability of EVM RPC errors in logs.
• UTXO reorg detection fix (#1398): fixes reorg detection on UTXO chains.
• Avoid Base newHeads bursts (#1407): debounces bursty newHeads notifications on Base.
• Dual (WS/HTTP) rpc_client support (#1400): allows separate WebSocket and HTTP RPC endpoints for EVM backends.
• Reliable SIGTERM shutdown + clean RocksDB close (#1408): reworks signal fan-out so main shutdown always runs, unblocks workers, and stops periodic state writes during shutdown.
• Resync recovery on errors (#1409): detects errors in parallel/bulk sync and triggers controlled resync restarts on rollback/reorg to avoid infinite retry stalls.
• Fixed scientific notation parsing error (#1429): AmountToBigInt now safely handles scientific notation (e/E), keeps a fast path for plain decimals, and rejects pathological exponent expansion.
• Fix Nillion (NIL) token decimals (#1443): adds the Nillion NIL ERC-20 contract to the contract-fix config with decimals: 6, correcting misscaled balance/transfer amounts.
• Don't lowercase Base58 Tron token addresses for fiat rates (#1458): stops case-sensitive Base58 Tron contract addresses from being lowercased during fiat-rate lookups (which broke their rate resolution), while hex EVM tokens keep lowercase normalization.
• Skip ZMQ initialization when message_queue_binding is empty (#1460): enables ZMQ-less operation with zebrad by skipping zmq_connect("") instead of returning EINVAL.
• Accept BTC non-standard tx versions outside int32 range (#1478): decodes getrawtransaction JSON version as uint32 to fix "Transaction not found" for historical bitcoin transactions whose version exceeds int32 max.
• Retry unfinalized RPC responses (#1489): maps Avalanche "cannot query unfinalized data" errors to ErrBlockNotFound instead of swallowing them, preventing trace-length mismatches during sync.
• Fix fiat rates: change platform currency from eth to usd (#1495): corrects the fiat-rate query currency for token rates; requires running reset_eth_token_rates.sh after deploy.
• Stop ERC20 batch fallback from amplifying RPC calls (#1501): prevents a single bad batch response from triggering per-contract eth_call fallbacks that amplified failed requests into N+1 RPCs.
• Deduplicate address descriptors and fix confirmed-block matching (#1508): deduplicates subscriber addresses before counting and restricts confirmed-block tx conversion to publishNewBlockTxs subscribers, reducing expensive receipt RPCs.
• Retry transient missing-tip block fetches before ResyncIndex (#1517): retries transient ErrBlockNotFound inside the sequential sync loop instead of unwinding to the full ResyncIndex path, preventing slowdowns on load-balanced RPC tip skew.
• Fix NFT self-transfer reorg rollback (#1525): corrects ERC-721/1155 ownership rollback when a self-transfer block is disconnected during reorg.
• Fix config propagation duck-typing issue (#1528): fixes a structural-typing mismatch that prevented certain config values from being propagated.
• Prevent sync stalls on load-balanced EVM RPC skew (#1530): makes EVM sync tolerate load-balanced backend tip height inconsistencies and prevents the parallel/bulk coordinator from wedging when workers report abort conditions.
• Heal silently-stalled EVM newHeads tip feeds (#1533): adds a chain-aware staleness watchdog that detects when the push feed goes silent without raising sub.Err() and heals it, preventing undetected sync stalls.
• Make CoinGecko fiat-rate fetching resilient to 429 throttling (#1560): adds a self-healing pass for missing daily rates at startup and improves resiliency of fiat rates fetching.
• Reconcile the alternative-provider send-tx mempool cache (#1562): re-checks liveness and heals nonce-superseded entries in the self-maintained alternative/private-relay send-tx cache (which relays don't expose for sync), with new metrics; no API/wire change.
• Keep alt-mempool txs visible when private relay stops surfacing them (#1572): defers eviction of alt-mempool txs to the absolute cache timeout when eth_getTransactionByHash returns empty from private relays, preventing premature disappearance.
• Tron: polling-only tip sync fallback when ZeroMQ is unavailable (#1578): adds a polling fallback for Tron tip sync when the node runs the MongoDB event plugin instead of the native ZMQ queue.
• Always serialize token decimals, default unresolved to coin convention (#1579): removes omitempty from token decimals so clients can distinguish 0-decimal tokens from missing metadata; defaults unresolved values to 18 for ERC-20.
• Tron: keep receipt logs from unsolidified blocks (#1583): retains receipt data for not-yet-solidified Tron blocks so token transfers are indexed immediately instead of waiting for solidification.
• Send a Blockbook user-agent on CoinGecko requests (#1589): adds a User-Agent header to CoinGecko fiat-rate requests to avoid being blocked/throttled, complementing the 429-resilience work in #1560.
• Prevent panic parsing non-32-byte-aligned EVM input data (#1591): fixes an index-out-of-range panic when transaction input data is not aligned to 32-byte words.
• Disable mempool sync on remaining L2 configs (#1599): sets disableMempoolSync: true for OP Stack and Arbitrum configurations where the backend does not support newPendingTransactions subscriptions.
• Avoid int64 overflow in on-chain base fee conversion (#1605): uses big.Int.SetUint64 for baseFeePerGas instead of int64 cast, preventing negative values on high-fee L2s.
• Fix PIVX Sapling txid computation (#1607): computes the correct canonical txid for PIVX Sapling transactions (v>=3) by hashing the entire raw transaction bytes instead of just the decoded portion.
• Recover GetTransaction on archive backends with pruned tx index (#1610): falls back to reconstructing the transaction from its receipt and block body when eth_getTransactionByHash returns null on backends with pruned transaction hash indexes.
• Prevent slice-bounds panic from ENS log name-length overflow (#1613): guards against a crafted ENS NameRegistered log causing a low > high slice expression, fixing an unauthenticated availability DoS that could crash the EVM sync goroutine.
• Prevent duplicate ERC-721 holdings (#1624): makes ERC-721 holding insertion idempotent so a replayed Transfer log can't credit the same token ID twice, preserves holdings across self-transfers and their reorg rollback, and adds a read-only RocksDB checker that reports (but never repairs) existing duplicates.
• Gate alternative-provider nonce lookups to recent private senders (#1628): stops routing every eth_getTransactionCount to the alternative provider when *_ALTERNATIVE_SENDTX_URLS is set, restricting it to senders with a recent privately submitted tx — avoiding provider rate-quota exhaustion, 429 log floods, and stale pending nonces.
• Rename ETH contract 0x6f40d4A6237C257fff2dB00FA0510DeEECd303eb to Fluid (#1334).

Security

• Potential DoS fix for oversized pagination inputs (#1363): validates extreme page and pageSize values to prevent resource-exhaustion requests.
• Security hardening: CSP + XSS fixes in templates (#1397): adds CSP headers and fixes XSS vulnerabilities in templates.
• Escape HTML in token name and symbol shown in explorer (#1346).
• WebSocket origin allowlist (#1421): adds optional origin checks with explicit logging to reduce cross-origin websocket exposure when not protected by a proxy.
• Request-size and template hardening (#1434): limits /api/sendtx body size, rejects oversized websocket messages, and avoids template.JSStr.
• Limit fiat timestamp requests (#1520): adds a 1000-timestamp maximum for fiat-rate batch lookups and a global WebSocket active-request limit.
• Limit xpub descriptor expansion (#1521): bounds xpub change-list expansion before account scans, caps the in-memory xpub cache size, and evicts LRU entries.
• Fix XSS in xpub explorer descriptor handling (#1552): anchors the xpub descriptor regex with a terminal $ and avoids rendering user-supplied strings through template.JSStr in the QR-code JavaScript expression.
• CI/CD security hardening (#1553): pins actions and dependencies to full commit SHAs, adds dependabot, verifies Go tarball and backend artifact checksums, restricts workflow permissions, and adds opt-in TLS verification for deploy scripts.
• Upper-cap limits on WebSocket endpoints (#1582): caps in-flight mempool-filters responses per connection, bounds fiat-rate currency selectors, and hardens ERC-1155 TransferBatch log parsing against OOM from malformed data.
• Quote paths in root logrotate cleanup (#1602): prevents arbitrary recursive deletion by quoting log paths in the root cron logrotate script, fixing a local privilege-boundary issue reachable from the Blockbook service user.
• Cap subscribeFiatRates tokens array length (#1623): adds a 1000-token maximum for subscribeFiatRates WebSocket requests, consistent with existing caps on other list parameters.

Observability

• Syncing/caching Prometheus metrics (#1420): introduces many new metrics for syncing throughput and cache behavior.
• WebSocket/API perf + fiat observability improvements (#1423): adds Prometheus metrics for fiat enrichment and API behavior.
• Metric for alternative fee-provider requests (#1485): adds a Prometheus counter tracking alternative fee-provider request outcomes, labeled by provider and status.
• Graceful consensus node monitoring degradation (#1488): marks the consensus node as "unreachable-locally" on dev instances when not running locally, reducing maintenance overhead while preserving production visibility.
• Observe JSON-RPC calls for block sync (#1527): adds error-request metrics for JSON-RPC calls made during block sync.
• Auto-generated Grafana dashboard from source of truth (#1541): generates the Grafana dashboard from metrics.yaml and panels.yaml to eliminate duplication; adds four new WebSocket abuse-observability metrics (connection requests, rejections, unique IPs, per-IP connection count).
• Correct stale EIP-1559 max-fee panel (#1596): fixes an incorrect instant-tier claim in the EIP-1559 max-fee Grafana panel description.
• Sync RPC latency metric (#1601): adds a Prometheus latency histogram for sync-internal RPC calls.

Fiat Pipeline

• Plan-aware CoinGecko API handling (#1370): detects the CoinGecko API plan and adjusts endpoints, request pacing and headers accordingly.
• Adjusted Infura request periods (#1269).
• Extract fiat rates from worker.go with more tests (#1424): moves fiat-rate logic into a dedicated component and expands test coverage.
• See also the CoinGecko 429-resilience (#1560), user-agent (#1589) and platform-currency (#1495) fixes under Reliability and Correctness.

Configuration and Deployment

• Configurable backend RPC endpoints for builds/tests (#1392): adds per-coin BB_RPC_URL_* overrides for non-local backends, BB_RPC_BIND_HOST_*/BB_RPC_ALLOW_IP_* for safer network exposure, plus rpc_url_ws_template and BB_RPC_URL_WS_* overrides.
• Override Message Queue URL from environment variables (#1468): allows overriding the message queue connection URL via environment variables without modifying coin config.
• Configurable debouncedelay; increased defaults for Polygon and Arbitrum (#1475): makes the newHeads debounce delay configurable and increases defaults for Polygon and Arbitrum to tolerate frequent short reorgs; adds explicit trace_timeout for heavy debug_traceBlockByHash calls.
• Decrease mempool timeout for MEV-protected coins (#1500): reduces the stale-tx eviction timeout for alternative/private relay mempool entries that expire faster than the public mempool.
• Runtime env via optional EnvironmentFile (#1574): adds an optional EnvironmentFile=/etc/blockbook/blockbook.env to the systemd unit so runtime config no longer requires hand-editing /etc/systemd/system.conf.
• Extend rate limiting to cover all dynamic routes (#1588): replaces the /api-only rate-limit allowlist with a deny-all-except-static gate, covering explorer UI routes alongside REST API routes.
• Tune REST/UI rate-limit defaults for individual user traffic (#1590): adjusts per-client rate-limit defaults to 20 req/min with burst 20, matching individual browsing patterns rather than high-throughput clients.
• Make WebSocket per-connection pending-request limit configurable (#1626): exposes the previously hard-coded maxWebsocketPendingRequests (48) as a per-coin env knob so self-hosted batch consumers pipelining many requests over one connection are no longer disconnected mid-batch.
• Configurable per-coin xpub expansion and cache caps (#1630): replaces the hard-coded xpub cache-size, expiration, and max-derivation constants with a per-coin XpubConfig, and raises the default cache to 1024 entries to stop thrashing under many concurrent users.
• Support no-compression RocksDB builds on Windows (#1259).

Build and CI/CD

• New GitHub Actions build → deploy pipeline (#1426, #1437, #1438, #1439, #1447, #1448, #1453, #1471): full build/deploy workflows for prod and dev, including backend building, post-deploy sync waiting and filtered E2E validation.
• Deploy with dpkg (#1446): packages deployments as Debian packages.
• Remove legacy GitLab CI, improve Python setup (#1551).
• CI/CD pipeline review fixes (#1603) and workspace-local npm cache (#1615).
• Upgrade Go to 1.25 and dependencies (#1367): also fixes Avalanche sync.
• Resolve Arbitrum, Base, and Zcash build errors (#1325).

Testing

• API-level E2E suite + deploy workflow (#1426): adds E2E tests against live Blockbook endpoints plus GitHub Actions build/deploy stages that wait for sync and run filtered E2E validation after deploy.
• Tron E2E API tests (#1440): adds E2E tests for Tron API endpoints.
• Ethereum Classic integration tests (#1454): adds integration tests covering Ethereum Classic RPC and API endpoints.
• ERC-4626 E2E tests (#1511): adds E2E tests for the ERC-4626 vault enrichment protocol.
• OpenAPI specification + swagger endpoint with TS-compiled verification (#1523): introduces an openapi.yaml spec served via swagger-ui, separates E2E tests from integration tests, and adds CI/CD verification that blockbook-api.ts is type-compatible.
• Extend E2E suite with fiat rate and WebSocket tests (#1539): adds fiat-rate freshness and validity checks plus WebSocket block/balance-history/tx tests; produces jUnit XML test reports for CI visibility.
• Agentic local testing (#1514) and local env var cleanup (#1516): improves the local testing workflow.
• System check for local test prerequisites (#1564): adds a pre-check that validates the local environment meets testing requirements, with clear error messages for missing dependencies.
• Testnet integration/E2E tests (#1575): adds integration and post-deploy E2E coverage for Sepolia, Hoodi, and Nile testnets; fixes a matchable-name collision that caused sibling testnets to share one subtest name.
• Parallelize E2E test suite (#1601): runs E2E tests across coins in parallel, adds proactive sample preloading and persistent WebSocket connections.
• Ethereum/Tron presets in test-websocket page (#1464) and sendTransaction test with disableAlternativeRPC flag (#1320).
• Raise fiat concurrency-test drain timeout (#1614) and widen block-index search window for ETC tests (#1616): reduce CI flakiness.

Backend Updates

• Bitcoin (+testnets): 29.0 → 29.2 (#1343)
• Ethereum — erigon (+testnets): 3.0.1 → 3.3.3 and latest (

Note truncated.

What's Changed

• Compute values of internal transactions in balance history by @martinboehm in 4b3c821
• Improve parsing of ETH input data by @martinboehm in a81420f
• Add getBlock websocket endpoint by @martinboehm in 6626f33
• Add extended index option to bitcoin configs by @martinboehm in 7ae521e
• Add BNB Smart Chain by @kaladinlight in #869
• Generate typescript documentation from golang types by @martinboehm in 15c19ac
• Add admin page for refetching internal data by @martinboehm in 7b068e0)
• perf: leverage binary search for managing for Ids and MultiTokenValues by @kaladinlight in #910
• Get hourly and five minutes fiat rates @martinboehm in a4f7f5b
• Golomb filter of scriptPubKeys for mempool txs by @martinboehm in #923
• Add Polygon by @kaladinlight in #872
• Change symbol for Sepolia by @AdamSchinzel in #962
• Use Erigon for Ethereum Sepolia backend by @AdamSchinzel in #986
• Add Holesky by @AdamSchinzel in #977
• Add support of staking pools by @martinboehm in ac46385
• Add mempool.space alternative blockchain fees provider by @martinboehm in 5f47f3c
• Refactor in initialization NewCoinGeckoDownloader by @romanornr in #1011
• Update type for gasPrice by @AdamSchinzel in #1037
• Remove Goerli by @AdamSchinzel in #1055
• Add Optimism Bedrock by @kaladinlight in #901
• Show Nonce for ethereum type transactions in explorer by @martinboehm in c1f2e62
• Add network parameter to getInfo ws request by @martinboehm in a0960c8
• Add Bitcoin Testnet4 by @martinboehm in #1141
• Add Arbitrum One and Arbitrum Nova Support by @kaladinlight in #1112
• EthereumType: admin interface to read and update contract info by @martinboehm in a55c69a
• Add option to disable sync of mempool transactions by @martinboehm in 4c5c0bd
• Add support for h suffix in addition to ' suffix is to denote hardened xpub derivation by @martinboehm in 783ab61
• Show raw tx hex in UI by @grdddj in #1162
• Add Ethereum type EIP1559 fee estimate by @martinboehm in a3b0a05
• Use mempool.space for testnet4 by @grdddj in #1199
• Add Base Support by @kaladinlight in #1150
• Initialize block times asynchronously to speed up server startup by @martinboehm in c1be450
• Ethereum Pectra Fork by @kaladinlight in #1211
• Upgrade rocksdb to v9.10.0 and go to v1.23.7 by @martinboehm in 1448a11
• Optimize slice handling of pack/unpack addressContracts by @martinboehm in a9be4a0
• Unpack addressContracts partially during connect block to improve performance by @martinboehm in d61a113
• Add parallel connect of blocks for EthereumType coins by @martinboehm in 0790f88

For Ethereum-type coins, database migration is performed during the upgrade process. Migration duration varies based on database size and may take several minutes to tens of minutes. During migration, the server is offline and cannot process client requests. Bitcoin-type coins do not require database migration; the server becomes operational immediately after startup.

New Contributors

• @justanwar made their first contribution in #855
• @miguilimzero made their first contribution in #945
• @AdamSchinzel made their first contribution in #962
• @XK4MiLX made their first contribution in #970
• @fanquake made their first contribution in #982
• @marek-liska made their first contribution in #992
• @AlexanderPavlenko made their first contribution in #1036
• @hishope made their first contribution in #1163
• @beforetech made their first contribution in #1206
• @costcould made their first contribution in #1207
• @yudrywet made their first contribution in #1213
• @kedazo made their first contribution in #1217
• @evenevent made their first contribution in #1222
• @f7b made their first contribution in #1234

Full Changelog: v0.4.0...v0.5.0

This is a major release that improves support primarily of the Ethereum type coins.

Ethereum type coins features

• internal transactions (requires backend running in archive mode)
• processing of non fungible tokens (ERC721 and ERC1155)
• error details of failed transactions
• contract creation and destruction events in TX
• support for ENS (Ethereum Naming Service) of addresses
• parsed function signatures (from https://www.4byte.directory/)
• fiat exchange rates for ERC20 tokens
• NFT token preview
• support for alternative EVM chains (by @kaladinlight)
• configs to run archive versions of the blockchains
• support of the Avalanche chain (by @kaladinlight)

Bitcoin type coins features

• calculation of the transaction virtual size (vsize)
• estimation of mining time of mempool transaction

General changes

• upgrade to go 1.19.2, rocksdb 7.7.2
• explorer redesign
• explorer is able to show values in fiat currencies
• reworked download of exchange rates

In case of the Ethereum type coins, the database is not compatible with previous the versions. The database must be recreated by inital synchronization with the backend. To process the internal transactions, the backend must run in archive mode and the synchronization is slow, can take several weeks.
For the Bitcoin type coins, the database upgrades automatically, no action is necessary