* Adds a `Nu6_1` variant to `NetworkUpgrade`
* updates CONSENSUS_BRANCH_IDS to include NU6.1 and NU7 when compiled with the `zebra-test` feature
* Update zebra-chain/src/parameters/network/testnet.rs
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
---------
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
* Regroup imports in `.../tests/common/regtest.rs`
* Regroup imports in `.../methods/tests/prop.rs`
* Regroup imports in `.../get_block_template.rs`
* Regroup imports in `.../zip317.rs`
* Regroup imports in `.../get_blockchain_info.rs`
* Regroup imports in `.../types/get_raw_mempool.rs`
* Regroup imports in `.../types/transaction.rs`
* Regroup imports in `.../server/tests/vectors.rs`
* Regroup imports in `.../args.rs`
* Regroup imports in `.../main.rs`
* Regroup imports in `.../openapi-generator/main.rs`
* Regroup imports in `zebrad/src/commands/start.rs`
* Regroup imports in `.../tests/fake_peer_set.rs`
* Regroup imports in `.../components/miner.rs`
* Regroup imports in `.../tests/acceptance.rs`
* Regroup imports in `.../get_block_template.rs`
* Update changelog
* Update end of support
* Add release date
* Add breaking change description
* Add new PRs to changelog
* Add breaking change description to changelog
* Update list of PRs in changelog
* chore: Release
* Apply suggestions from code review
Co-authored-by: Arya <aryasolhi@gmail.com>
---------
Co-authored-by: Arya <aryasolhi@gmail.com>
* Introduce Nu7
* Introduce Nu7 fo other crates of Zebra
* Fix of new_regtest call (as it additionally needs Nu7 arg now)
* Fix of new_regtest call (as it additionally needs Nu7 arg now) (2)
* Set Nu7 as a network update for testnet in zebra-chain network tests
* Fix serde names for NU7
* Update test snapshot in zebra-rpc to use NU7
* Copy Nu7-related changes from zsa-integration-state
* Uncomment zcash_unstable = nu7
* Fix Nu7 constants and add cfg(zcash_unstable ...) attribute according to PR #15 review comments
* Update network constant values according to PR #15 review comments
* Add zcash_unstable=nu6 Rust flag to .cargo/config.toml to use nu6 by default
* Add zcash_unstable = nu6 cfg in zebra-network/.../types.rs
* Fix nu7 activation heights in network_upgrade.rs (nu6 value + 1 does not work - causes a test failure)
* Add cfg for CURRENT_NETWORK_PROTOCOL_VERSION constant definition, add FIXMEs for a couple of Nu6 processing cases, add processing of Nu7
* Update get_blockchain_info@testnet_10.snap
* Update get_blockchain_info@mainnet_10.snap
* updated cfg flag
* remove `zcash_unstable` flag
* Remove testnet and mainnet NU7 activation heights, comment out consensus branch id and conversion to zcash primitives nu type
* Yep, it'll work after NU7
* Yep, the test should work fine after NU7
* Yep, it only needs to be a post-nu6 height.
* other fixes and cleanups
* Updates snapshots, removes unnecessary FIXMEs, fixes issues with bad merge conflict resolution
* fixes test hang when there are NUs defined without activation heights
* fixes test, applies suggestion from code review.
* Enable consensus branch ID for Nu7
---------
Co-authored-by: Dmitry Demin <dmitry@qed-it.com>
Co-authored-by: Arya <aryasolhi@gmail.com>
Co-authored-by: Marek <mail@marek.onl>
The `HistoryTree` type is intended for internal use within the node; it
should not be exposed via the ReadStateService response. Instead, this
response should simply include the hash needed for block template
construction.
* fix(test): wait for genesis block before launching lightwalletd
The `lightwalletd_integration` test would fail when running with an empty
`zebrad` state (`LaunchWithEmptyState` test type). `lightwalletd` expects
the connected `zebrad` instance to have processed at least the genesis
block upon startup and treats a completely empty state as a fatal error.
This adds a wait step specifically for the empty state scenario.
The test now waits for `zebrad` to log that it has committed the genesis
block (Height 0) before launching the `lightwalletd` process. This
ensures `zebrad` is ready and prevents `lightwalletd` from exiting
prematurely.
* fix(test): use syncer state tip log for lightwalletd launch condition
* fix(test): lint
* Rm `.env` files
* Update `mining-docker.md`
* Revert "Rm `.env` files"
This reverts commit caaa4559c3.
* Add `enable_cookie_auth` to default Zebra conf
* Rename `default_zebra_config.toml`
* fmt `prometheus.yaml`
* Update `docker/test.env`
* Update `docker/.env`
* Refactor `docker compose` for lwd
* Enable disabling cookie authentication
* Update `docker compose` for tests
* Update general `docker compose`
* Update docs for running Zebra in Docker
* Add example `docker compose` file for Grafana
* Fix a bug in an example command
* Refactor test execution logic in entrypoint
* Rename `v2.1.0.toml` conf to `custom-conf.toml`
* Fix CI tests for loading of custom conf files
* Use the new conf file name in CI checks
* Use an extended regexp for custom conf CI check
* introduce new fields to `GetInfo`
* add address book to methods for getinfo connections field
* add the version field to getinfo
* track last node error or warning and display it in getinfo rpc method
* add the rest of the fields, minor cleanup
* fix the tests
* clippy
* feat(network): Add misbehavior tracking for peers in the address book
* - Add a `misbehavior_score` field to `MetaAddr`
- Add a `bans_by_ip` field to `AddressBook`
- Update the `AddressBook::update()` method to:
- increment misbehavior scores in its entries,
- add addr ips to bans_by_ip if the score is excessive,
- remove any addrs at the banned ip
- Avoid responding to `GetAddr` requests with addresses of misbehaving peers (return None from `sanitized()`),
- Avoid new inbound or outbound connections to banned ips
* Drops banned peer connections in peer set's `poll_ready()` method
* Adds rudimentary misbehavior score tracking
* fixes some proptests, moves and removes some TODOs
* fixes lint
* Removes outdated TODO
* Adds stub for acceptance test
* updates call to updated fn
* Stores likely inbound peer connection addresses in address book and return their IPs with the default port instead of the transient port when responding to GetAddr requests
* Avoids gossiping peer addrs from inbound connections
* updates test to check that sanitize won't return inbound peer addrs or addrs with non-zero misbehaviour scores.
updated misbehaviour score for potentially unavoidable errors.
* Updates `generate` RPC to support any network where PoW is disabled.
Updates acceptance test to check that zebrad instances disconnect once one of them advertises a block with an invalid PoW
* minor tangential cleanup
* Finishes acceptance test, sends misbehavior updates from syncer, and always updates address book entries if the update is to their misbehaviour score
* skip test on windows (to minimize risk of port conflict)
* Applies suggestions from code review
* Refactor formatting & docs
* Refactor the `runtime` stage in Dockerfile
* Remove unused code from `entrypoint.sh`
* Simplify `entrypoint.sh` setup
* Revise docs & formatting
* Adjust default values for env vars
* Bump Rust v from 1.79 to 1.81 in Dockerfile
* Refactor `entrypoint.sh`
* Refactor `Dockerfile`
* Add TODOs for monitoring stage to Dockerfile
* Refactor `Dockerfile`
* Add TODOs for monitoring stage to Dockerfile
* Fix a typo
* Allow running `zebrad` in test mode
* Allow custom config for `zebrad` in test mode
* Remove `curl` from the `runtime` Docker image
* Remove redundant echos
* Remove a malfunctioning CD test
The test was using a custom config file set in `test_variables`.
However, the file was not included in the Docker image, and the
entrypoint script created a new, default one under the original file's
path. Zebra then loaded this new file, and the test passed because the
pattern in `grep_patterns` matched Zebra's output containing the
original path, even though the config file was different.
* Remove a redundant CI test
* Remove all packages from the `runtime` stage
* Docs cosmetics
* Clarify docs
* Bump Rust version
* Remove a security note
* Explicitly specify network cache dir
* Explicitly specify cookie dir
* Set UID, GID and home dir for the `zebra` user
* Set a working dir for the `zebra` user
* Don't remove `FEATURES`
* Try re-introducing the `testnet-conf` check
* `ZEBRA_CACHED_STATE_DIR` -> `ZEBRA_CACHE_DIR`
This dir doesn't hold only the state cache anymore, but also the cache
for network peers, and the cookie file.
* Refactor the dir structure
* Check that `ZEBRA_CONF_PATH` exists in the image
* Improve the check for `ZEBRA_CONF_PATH`
* Use different flag in the `ZEBRA_CONF_PATH` check
* Simplify the `ZEBRA_CONF_PATH` check
* Fix spelling
* Comment out the `testnet-conf` CI check
* Add commented out `test-zebra-conf-path` CI check
* Reintroduce `testnet-conf` CI check
* Update the `custom-conf` CI check
* Add `v2.1.0.toml` conf file
* Refine the `v2.1.0.toml` conf file
* Remove `ZEBRA_LISTEN_ADDR` from the entrypoint
* Remove `ZEBRA_CHECKPOINT_SYNC` from the entrypoint
* Stop supporting configuration of the RPC port
* Add default conf file
* Prepare Zebra's config in the entrypoint script
* Remove unneeded packages from the `deps` target
* Docs cosmetics
* Use only `$FEATURES` in entrypoint
* Simplify handling of Rust features
* Add a TODO
* Add CI debug statements
* Don't require test vars in conf test
* Reintroduce `protoc`
* Remove `-e NETWORK`
* Remove `ZEBRA_FORCE_USE_COLOR=1`
* Remove `ZEBRA_CACHE_DIR=/var/cache/zebrad-cache`
* Reintroduce the "custom-conf" test
* Set up test env the same way as prod
* Don't repeatedly check for conf file in entrypoint
* Simplify file ownership in Dockerfile
* Fix checkpoint tests in entrypoint
* Fix Zebra config CI tests
* `LIGHTWALLETD_DATA_DIR` -> `LWD_CACHE_DIR`
* Add config for `LWD_CACHE_DIR` to Dockerfile
* `/var/cache/zebrad-cache` -> `~/.cache/zebra`
* `var/cache/lwd-cache` -> `/home/zebra/.cache/lwd`
* Remove `LOG_COLOR=false` from GCP setup
* Don't specify `LWD_CACHE_DIR` in CI tests
* Don't switch to `zebra` user for tests in Docker
* Join "experimental" and "all" tests in CI
* Remove outdated docs
* Refactor tests with fake activation heights
* Fix tests for scanner
* add a channel for submit_block notifications to gossip task
* fix tests and gossip logic
* remove the network discriminant and add a test
* clippy suggestions
* fix unused variable
* attempt to fix the conditional compilation issues
* fix default
* Suggestions for "fix(mining): Advertise mined blocks" (#9183)
* refactor error conversions in GetBlockTemplateRpcImpl and rewords documentation
* Replaces polling mined block receiver with a select
* Skip checking that Zebra is likely synced to the network tip before returning block templates on Testnet.
* fixes a clippy lint and a concurrency bug
---------
Co-authored-by: Arya <aryasolhi@gmail.com>
* Remove unnecessary clone
* Fix test in zebra-script
* Document that RPC server addr must be set
* Change the log level of missing port msg to info
Having the RPC port not specified is part of Zebra's normal operation,
and is the default config.
* Fix links in docs for tracing
* Update zebrad/src/commands/start.rs
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
---------
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
* Adds new column family for [spent_out_loc] -> [spending_tx_loc] with a read method and an update to `prepare_spending_transparent_tx_ids_batch()` for maintaining it when committing blocks to the finalized state.
Adds TODOs for remaining production changes needed for issue #8837.
* add spending tx ids for spent outpoints to non-finalized chains
* adds a `spending_transaction_hash()` read fn for the new column family
* Adds a `TransactionIdForSpentOutPoint` ReadRequest and a `TransactionId` ReadResponse
* Updates snapshots, removes outdated TODOs, moves a TODO.
* Clarifies `spent_utxos` field docs, fixes an assertion
* import TypedColumnFamily from `finalized_state` instead of from the crate.
* adds db format upgrade for spent outpoints -> tx hash
* adds revealing tx ids for nullifiers in finalized and non-finalized states
* updates nullifiers column families to include revaling transaction locations in db format upgrade
* Renames new read state request to `SpendingTransactionId` and updates its type to a `Spend` enum
* refactor db format upgrade and prepare_nullifiers_batch() to use ZebraDb instead of DiskDb, checks cancel_receiver before every db operation
* Adds acceptance test for checking that the finalized state has spending transaction ids
* Adds variant docs to zebra_state::request::Spend enum
* Updates Zebra book with the latest changes to the rocks db column families
* Updates acceptance test to check non-finalized state
* adds a few log messages to the acceptance test, reduces frequency of logs for progress updates
* fixes docs lint and skips test when there is no cached state
* Avoids returning genesis coinbase tx hash when indexes are missing
* Adds `indexer` compilation feature in zebra-state and build metadata in db format version file
* stops tracking new indexes in finalized state when feature is unselected
* stops tracking new indexes in non-finalized state when indexer feature is unselected
* condenses imports
* - adds build metadata when writing db version file, if any.
- adds the build metadata to the db version file before adding indexes.
- deletes indexes when running without the `indexer` feature
* Replaces dropping cf with deleting range of all items to avoid a panic when trying to open the db with that column family.
* Fixes lint, avoids reading coinbase transactions from disk
* updates db column families table
* Document need for having an indexed cached state and use a multi-threaded tokio runtime in has_spending_transaction_ids test
* fixes call to renamed `future_blocks` test fn
* improves test logs and fixes a disk format deserialization bug
* Replaces a new expr with a previously existing constant, fixes typo
* skips re-verifying transactions in blocks that are present in the mempool.
* clippy fix
* adds a test
* fixes clippy lint
* Use NU6 & V5 tx in new test
* Uses correct consensus branch id in test
* clean-up: simplify the def of `MapServerError`
* Use `HexData` instead of `String` for TXIDs
* Remove a redundant test
We don't need such a test anymore because the deserialization is handled
by Serde now.
* Adjust tests for using `HexData`
* Make `height` and `confirmations` optional
* Use legacy error codes
* fmt
* Remove unneeded error codes
* Remove `zebra-rpc/src/constants.rs`
* Rename `MapServerError` to `MapError`
* Rename `OkOrServerError` to `OkOrError`
* Allow specifying error codes when mapping errors
* Allow setting error codes when mapping options
* Use the right error code for `getrawtransaction`
* fmt
* Add docs for the error conversion traits
* Refactor the error handling for `getblock`
* Refactor error handling in `sendrawtransaction`
* Refactor the error handling for `getblock`
* Update the error handling for `getrawtransaction`
* Refactor error handling for `z_gettreestate`
* Refactor the error handling for address parsing
* Refactor the error handling for getrawtransaction
* Update `z_gettreestate` snapshots
* Cosmetics
* Refactor error handling in `getblock`
* Refactor error handling in `getblockheader`
* Simplify `getrawtransaction`
* Check errors for `getrawtransaction`
* fmt
* Simplify proptests
* Fix unit tests for `getaddresstxids`
* Fix unit tests for `getaddressutxos`
* fix docs
* Update snapshots for `getrawtransaction`
* Update zebra-rpc/src/server/error.rs
Co-authored-by: Arya <aryasolhi@gmail.com>
* Use `transaction::Hash` instead of `HexData`
* Simplify error handling
* Update zebra-rpc/src/server/error.rs
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
* Move a note on performance
* Fix a typo
* Use `String` instead of `transaction::Hash`
* Adjust and add proptests
* Reintroduce snapshots for invalid TXIDs
* Don't derive `Serialize` & `Deserialize` for txids
Deriving `serde::Serialize` & `serde::Deserialize` for
`transaction::Hash` was superfluous, and we didn't need it anywhere in
the code.
---------
Co-authored-by: Arya <aryasolhi@gmail.com>
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
* Fixes bug in send transaction test
* fixes new bug in send_transaction_test
* Removes unused `load_transactions_from_future_blocks` and factors out code for sending transactions to its own fn
* corrects tx count updates to exclude coinbase txs
* fixes formatting
* Calls zebra's sendrawtransaction method if lwd's send_transaction() return an error for more detailed error info
* removes instrument
* avoids panic when a future block has only a coinbase transaction
* fixes check for gossip log (only happens when 10 txs have been added
* fixes a concurrency bug, adds more detailed errors.
* removes unnecessary wait_for_stdout calls and fixes condition for early return
* Fixes issue around missing stdout line
* Fixes bug around expected tx ids and removes outdated TODO
* Fixes issue with expected ZF funding stream address balance in post-NU6 chains
* fixes the rest of wallet_grpc_test
* Update zebrad/src/components/mempool/downloads.rs
Co-authored-by: Conrado Gouvea <conrado@zfnd.org>
---------
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Conrado Gouvea <conrado@zfnd.org>
* change(mempool): Return verification result after attempting to insert transactions in the mempool (#8901)
* respond with mempool verification result after a transaction has been inserted or has failed to be inserted into the mempool
* returns mempool verification errors early, and fixes handling for cancellations or timeouts.
* Adds a comment in test warning against code reuse with buffered services.
* De-duplicates handling for timeout errors
* Adds a test to check for crates in the Cargo.lock file that are being pulled in from a git source.
* add `check_no_git_refs_in_cargo_lock` to CI
* try skip instead of exclude
---------
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
* Adds getblockheader RPC method
* Updates snapshots, adds hash/height/next_block_hash fields to verbose response
* updates getblock snapshot
* updates getblockheader response type to hex-encode fields, adds ToHex impl for sapling::tree::Root, adds snapshot and vector tests for new RPC method, adds snapshots.
* rustfmt
* fixes snapshots, matches zcashd more closely
* fixes vectors test
* updates lwd failure messages (probably doesn't matter, but seems better to handle it now than risk debugging it later)
* fixes getblock_rpc test, fixes/reverses finalsaplingroot field byte-order.
* fixes vector test, addresses remaining differences with zcashd (except the `chainwork` field), updates snapshots, and avoids a possible panic when there's a chain reorg between state queries.
* Adds a comment noting that the `relative_to_network()` method was copied from zcashd
* Apply suggestions from code review
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
---------
Co-authored-by: Alfredo Garcia <oxarbitrage@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
* Adds a parameter to `zebra_consensus::router::init()` for accepting a mempool setup argument, adds and uses an `init_test()` fn for passing a closed channel receiver in tests where no mempool service is needed in the transaction verifier.
* Adds a `mempool` argument to the transaction::Verifier constructor (and a `new_for_tests()` constructor for convenience)
* Removes `Clone` impl on `transaction::Verifier` to add mempool oneshot receiver, updates tests.
* Adds TODOs
* updates transaction verifier's poll_ready() method to setup the mempool service handle.
* Updates VerifiedSet struct used in mempool storage
* Updates mempool service and its `Storage` to use the updated `VerifiedSet` `transactions()` return type.
* updates `created_outputs` when inserting or removing a transaction from the mempool's verified set
* Adds a TODO, updates field docs
* Updates `spent_utxos()` to query the mempool for unspent outputs
* Adds `spent_mempool_outpoints` as a field on tx verifier mempool response
* Updates mempool `Downloads` to return the spent_mempool_outpoints from the tx verifier response
* Updates `Storage.insert()` to accept a list of spent mempool transaction outputs
* Adds transaction dependencies when inserting a tx in `VerifiedSet`
* polls mempool svc from tx verifier when a mempool tx that creates transparent outputs has been verified.
adds a TODO for adding a `pending_outputs` field to the mempool Storage
* Adds `pending_outputs` field on mempool Storage and responds to pending outputs requests when inserting new transactions into the mempool's verified set
* replaces `UnminedTxId` type with `transaction::Hash` in mempool's verified set
* prune pending outputs when rejecting and removing same effects.
* Remove dependent transactions from verified set when removing a tx
* updates tests
* appeases clippy.
* removes unused `len()` method
* fixes doc links
* Adds transaction dependencies to the `FullTransactions` response, let the caller handle it (required to avoid moving zip317 tx selection code to mempool)
* updates block template construction to avoid including transactions unless their dependencies have already been added.
* updates tests
* Replaces placeholder setup channel with one that sends the mempool svc to the tx verifier, adds a timeout layer, adds a TODO about a concurrency bug
* Use a single query to check for unspent outputs in the mempool
* Updates `getblocktemplate` method to consider dependencies when sorting transactions for the final template
* fixes clippy lints, removes unnecessary Option in UnspentOutput response variant
* renames type alias and method, adds a TODO to use iteration instead of recursion
* Adds mempool_removes_dependent_transactions() test
* Updates Storage and VerifiedSet clear() methods to clear pending_outputs, created_outputs, and transaction_dependencies, adds TODO to use iteration instead of recursion.
* removes outdated TODO
* Adds a TODO for reporting queued transaction verification results from the mempool from the poll_ready() method
* Adds `mempool_responds_to_await_output` test
* updates mempool_responds_to_await_output test
* Uses iteration instead of recursion in verified set's remove() method and zip317 mod's dependencies_depth() method
* Adds a mempool_request_with_mempool_output_is_accepted test for the transaction verifier
* Moves delay duration before polling the mempool to a constant, uses a shorter timeout for mempool output lookups, adds a `poll_count` to MockService, and updates `mempool_request_with_unmined_output_spends_is_accepted` to check that the transaction verifier polls the mempool after verifying a mempool transaction with transparent outputs
* adds long_poll_input_mempool_tx_ids_are_sorted test
* Adds a `excludes_tx_with_unselected_dependencies` test
* Updates a TODO
* moves `TransactionDependencies` struct to `zebra-node-services`
* Updates `FullTransactions` response variant's `transaction_dependencies` type
* updates zip317 transaction selection for block templates to include dependent transactions
* Moves and refactors zip317 tx selection test to its own module, adds an `unmined_transactions_in_blocks()` method on network
* Removes `unmined_transactions_in_blocks()` test utility fn from mempool Storage test module and replaces calls to it with calls to the new test method on Network
* Fixes spelling mistake
* Adds `includes_tx_with_selected_dependencies` test
* fixes zip317 block construction issue
* Fixes vectors test
* Update zebra-node-services/src/mempool.rs
* restores `tip_rejected_exact` type
* updates affected tests
* Documents the new argument in `Storage::insert()`, updates outdated comment
* Update zebrad/src/components/mempool/storage/verified_set.rs
* fixes potential issue with calling buffered mempool's poll_ready() method without calling it.
* Avoids removing dependent transactions of transactions that have been mined onto the best chain.
* Updates `spent_utxos()` method documentation
* Avoids sorting getblocktemplate transactions in non-test compilations
* documents PendingOutputs struct
* Apply suggestions from code review
Co-authored-by: Marek <mail@marek.onl>
* cargo fmt
* Applies suggestions from code review
Avoids unnecessarily rejecting dependent transactions of randomly evicted mempool transactions.
Updates `TransactionDependencies::remove_all()` to omit provided transaction id from the list of removed transaction ids.
* Applies suggestions from code review.
* Adds minor comments
* Update zebrad/src/components/mempool/storage/verified_set.rs
Co-authored-by: Marek <mail@marek.onl>
* Remove an outdated comment (#9013)
---------
Co-authored-by: Marek <mail@marek.onl>
* add a cookie auth system for the rpc endpoint
* fix rand import
* fixes based on cookie method research
* add and use `cookie_dir` config, rpc client changes
* add missing dependency
* add a enable_cookie auth option to config and use it in all tests
* get rid of the unauthenticated method
* change config in qa python tests to run unauthenticated
* change return types in cookie methods
* change comment
* fix(rpc): Refactor the cookie-based RPC authentication (#8940)
* Refactor the cookie-based RPC authentication
* Rephrase docs
* Apply suggestions from code review
Co-authored-by: Arya <aryasolhi@gmail.com>
---------
Co-authored-by: Arya <aryasolhi@gmail.com>
* clippy
---------
Co-authored-by: Marek <mail@marek.onl>
Co-authored-by: Arya <aryasolhi@gmail.com>