This file lists the changes added to each version of tezos-node, tezos-client, and the other Tezos binaries. The changes to the Tezos protocol are documented in the docs/protocols/ directory; in particular in docs/protocols/alpha.rst.

Development Version

When you make a commit on master, you can add an item in one of the following subsections (node, client, …) to document your commit or the set of related commits. This will ensure that this change is not forgotten in the final changelog. By having your commits update this file you also make it easy to find the commits which are related to your changes using git blame.

Only describe changes which affect users (bug fixes and new features), not refactorings or tests. Changes to the documentation do not need to be documented here either.


  • Replaced the chain storage layer with a more efficient backend in both terms of performance and storage size.

  • Added an upgrade procedure to upgrade from the previous store to the new one. The procedure is implemented through the tezos-node upgrade storage command. This command is non-destructive: the previous store is preserved at <data_dir>/lmdb_store_to_be_removed and needs to be manually removed when the user made sure the upgrade process went well.

  • Reworked the storage snapshots:

    • Introduced a new snapshot format (v2)

    • Improved the snapshot export/import process in both terms of duration and memory usage

    • Added --export-format option:

      • --export-format tar (default) creates a snapshot as a portable tar archive

      • --export-format raw creates a snapshot as a raw directory suitable for IPFS sharing

    • The argument [output_file] in tezos-node export snapshot [output_file] becomes optional and defaults to a file whose name follows this pattern <NETWORK>-<BLOCK_HASH>-<BLOCK_LEVEL>.<SNAPSHOT_HISTORY_MODE>

    • Improved the metadata of snasphots which can be displayed using tezos-node snapshot info

    • The tezos-node snapshot import command is retro-compatible with the previous snapshot format (v1) but legacy snapshots cannot be exported anymore

  • Interrupted context reconstruction can now be resumed.

  • Promoted the experimental-rolling history mode to rolling. The node’s option --history-mode experimental-rolling is now deprecated and is equivalent to --history-mode rolling.

  • Reworked the nodes rolling and full history modes. Previously, these two modes were maintaining a window of <preserved cycles> cycles of metadata (5 on mainnet). These modes may now be configured to keep a larger window of metadata. E.g. tezos-node run --history-mode full+2 will maintain 2 extra cycles of metadata, in addition to the network’s preserved cycles. This may become useful for users that want to keep more data from the past: for instance, to compute rewards payouts. The default number of extra preserved cycles is 5 (5 + 5 on mainnet).

  • Improved the shutdown procedure for external validator process.

  • Added command replay which takes a list of block levels, hashes or aliases, revalidate those blocks in the context of their predecessor, and check that the result is the same as what is currently stored. This is mostly useful for debugging and benchmarking purposes.

  • Reduced the maximum allowed timestamp drift to 5 seconds.

  • The file descriptor sink, which can be used to output node events to a file using JSON format, now outputs events with an additional field "hostname". This field can be used to identify the node when aggregating events from multiple nodes. Its default value is the hostname of the device the node is running on, and it can be customized with environment variable TEZOS_NODE_HOSTNAME.

  • Fixed a bug that caused the lack of connection in private network with --connections set to 1.

  • Fixed a potential interleaving of distinct events written to a file descriptor sink simultaneously.

  • Introduced Access Control Lists for RPC servers, which allow to restrict access to selected RPC endpoints for different listening addresses.

  • Updated the behaviour of the history mode field in the node’s config.json configuration file. If the number of additional cycles is not explicitly specified, the default value is used. The default number of additional cycles to keep is set to 5.

  • You can now control the verbosity of the logs of the context storage backend using the TEZOS_CONTEXT environment variable. Set it to v to display log messages with level “info” or to vv to also display log messages with level “debug”.

  • The TEZOS_STORAGE variable now has no effect. Use TEZOS_CONTEXT instead (see previous item).

  • Added an RPC to run `TZIP-4 views<>`__ offchain, accessible via ../<block_id>/helpers/scripts/run_view.

  • Reintroduced the following RPCs in the Granada RPC plugin. These RPCs were already present in the Edo and Florence protocol plugin and are deprecated, they will be removed in the successor protocol of Granada.

    • ../<block_id>/helpers/scripts/run_code/normalized (deprecated alias of ../<block_id>/helpers/scripts/run_code)

    • ../<block_id>/helpers/scripts/trace_code/normalized (deprecated alias of ../<block_id>/helpers/scripts/trace_code)

  • Updated the output of the /stats/gc RPC entry point: it now also reports the number of full major collections made by the OCaml garbage collector. Because this changes the JSON schema of this existing RPC entry point, it is a breaking change.


  • Changed to 5 the recommended number of blocks after which an operation can be considered final. Under normal network conditions and an attacker with less than 33% of stake, an operation can be considered final with quasi-certainty if there are at least 5 blocks built on top of it. See Emmy* TZIP for more detailed explanations.

  • Added --mode light which makes the client execute some RPCs locally (to lower the load of nodes and to avoid having to trust the nodes). This mode is akin to light clients and SPV clients: it uses Merkle proofs to make the light mode super safe.

  • Added commands to display the hash of Michelson script from files and from addresses.

  • Added support for a new generic version of the multisig contract.

  • Added a new flag, --simulation, which simulates operations instead of preapplying them.

  • hash data command now supports the optional --for-script [TSV|CSV]

  • Rename --block option of sign message command to --branch.

  • Commands using an encrypted key now fail after the user fails to give the correct password three times

  • Added support for FA1.2 standard, allowing to interact with fungible assets contracts using the from fa1.2 contract ... commands, and support for running the view entrypoints offchain.

Baker / Endorser / Accuser

  • Optimized the performance of the baker to reduce the number of RPC calls to the node while waiting for endorsements.

Proxy server

  • Added a new binary: tezos-proxy-server, a read-only frontend to a node. It is designed to lower the load of nodes, by being capable of serving protocol RPCs. An instance of a proxy server is protocol-specific: it automatically picks up the protocol from the backing node when it starts. Proxy servers can be started and destroyed at will, making them easy to deploy.

    Please refer to the online documentation for further details.

Protocol Compiler And Environment

  • Export the environment V3 so protocols can be built against it.


Docker Images


Version 9.2


  • Added Granada, a protocol proposal for Mainnet featuring, among others, the Emmy* consensus algorithm, Liquidity Baking, and reduced gas consumption.

  • Added the configuration for Granadanet, a test network for Granada, as a built-in network alias (--network granadanet).

  • Updated the mempool to keep more than 50 non-included operations when receiving a new block. In particular, this should result in fewer endorsements being missed.

Docker Images

  • File scripts/ is now deprecated and may be removed starting from version 10.0. If you have a script that downloads this file (with wget for instance), your script should now download scripts/ instead and rename it into (with wget -O for instance).

  • File scripts/ may also be removed starting from version 10.0.

Version 9.1


  • Fixed a performance issue that caused the node to freeze for several minutes and memory usage to rise to unexpected levels.

  • Reintroduced the following RPCs in the Florence RPC plugin. These RPCs were already present in the Edo protocol plugin and were removed by mistake when moving the functionality they offer to the Florence protocol:

    • ../<block_id>/context/contracts/<contract_id>/storage/normalized

    • ../<block_id>/context/contracts/<contract_id>/script/normalized

    • ../<block_id>/context/big_maps/<big_map_id>/<script_expr>/normalized

    • ../<block_id>/helpers/scripts/run_code/normalized (deprecated alias of ../<block_id>/helpers/scripts/run_code)

    • ../<block_id>/helpers/scripts/trace_code/normalized (deprecated alias of ../<block_id>/helpers/scripts/trace_code)

Version 9.0


  • Fixed a bug where the mempool could crash with an assertion failure.

Version 9.0~rc2


  • Fixed a performance regression of the storage backend. This in particular impacted RPCs that query the context. This regression was introduced in 9.0~rc1.

  • Removed protocol PsFLorBA, the variant of Florence with baking accounts, which was rejected in favor of PsFLoren.

  • The cap on the number of expected connections that was introduced in 9.0~rc1 can now be bypassed with --disable-config-validation.


  • Added the fixes to the baker that were released in 8.3 but that were not present in 9.0~rc1 (which was published before 8.3).


  • Improved operation injection to better deal with cases where parameters (fees, gas limit, …) are partially given by the user.

Version 9.0~rc1


  • Added Florence, the current protocol proposal on Mainnet. This is the version of Florence without baking accounts (PsFLoren).

  • Added a new version of the protocol environment (v2). It is used by Florence.

  • Added built-in network configurations for Edo2net (which runs Edo2, the current Mainnet protocol) and Florencenet (which runs Florence). Their corresponding aliases for --network are edo2net and florencenet.

  • Capped the number of expected connections to 100 on the command-line interface.

  • Fixed a bug that caused the execution of the prevalidator when the node was not bootstrapped.

  • Enforced loading of non-embedded protocols before starting the node to allow the prevalidator to start correctly.

  • Optimized I/O and CPU usage by removing an unnecessary access to the context during block validation.

  • Fixed a bug where any event would allocate more memory than needed when it was not to be printed.

  • Added a new RPC for Alpha: helpers/scripts/normalize_type.

  • Replace Edonet by Edo2net in built-in network configuration. The alias to give to --network is now edo2net.

  • Removed the built-in configuration for Delphinet. You can no longer configure your node with --network delphinet.

  • The --network option now also accepts the name of a file containing the configuration for a custom network, or a URL from which such a file can be downloaded.

  • Fixed JSON encoding of timestamps before epoch (1970). Pretty-printing and encoding of dates before epoch in human-readable form (as part of a JSON value) that failed in the past will now succeed. Binary form (used when nodes exchange data) was unaffected by the bug. This may impact some RPC representations of timestamps.

  • Some RPCs now send their response in chunked transfer encoding. Additionally, the implementation allows for more concurrency internally: it allows RPC requests to be treated even if a request is currently being treated. This leads to some improved response times on some RPC requests.

  • Added a way to optionally specify an expected peer identity for all command line options accepting a point as argument (such as --peer). This identity can be given using the usual b58 format. The RPC patch /network/points/<point> {"peer_id": <peer_id>} set the expected identity and get /network/points/<point> tells whether an expected peer_id has been set.

  • Added a checking of the well-formedness of addresses in the config files when the node starts. If this check fails, the node stops with an explanation.

  • Fixed the targeted number of connections which did not respect the constraints expressed with –connections settings.

  • RPC: the semantics of ban and unban has changed:

    • instead of just affecting the banned/unbanned point, they affect all associated cryptographic identities;

    • additionally, ban now removes the cryptographic identity / point from the whitelist, which was not previously the case.

  • RPC: the following RPCs are now deprecated:

    • GET: /network/peers/<peer_id>/ban

    • GET: /network/peers/<peer_id>/unban

    • GET: /network/peers/<peer_id>/trust

    • GET: /network/peers/<peer_id>/untrust

    • GET: /network/points/<point>/ban

    • GET: /network/points/<point>/unban

    • GET: /network/points/<point>/trust

    • GET: /network/points/<point>/untrust

  • RPC: the following RPCs are added and replace those above:

    • PATCH: /network/peers/<peer_id> payload { acl: [ban,trust,open] }

    • PATCH: /network/point/<point> payload { acl: [ban,trust,open], peer_id: <peer_id> } where

      • {acl : ban}: blacklist the given address/peer and remove it from the whitelist if present

      • {acl: trust}: trust a given address/peer permanently and remove it from the blacklist if present.

      • {acl: open}: removes an address/peer from the blacklist and whitelist.

  • Added RPC DELETE /network/greylist to clear the greylist tables. RPC GET /network/greylist/clear is now deprecated.


  • Fixed the return code of errors in the client calls to be non-zero.

  • Added a new multisig command to change keys and threshold: set threshold of multisig contract ....

  • Added a command to perform protocol migrations in persistent mockup mode: migrate mockup to <protocol_hash>.

  • Added the --version flag.

  • Fixed commands --mode mockup config show and --mode mockup config init which returned the default values rather than the actual ones.

  • Replaced command check that <bytes> was signed by <pkh> by check that bytes <bytes> were signed by <pkh> to differentiate from new command check that message <string> was signed by <pkh>.

  • Added wallet support for PVSS keys.

  • Added support for all protocol constants in Mockup mode.

  • Mockup mode now uses Alpha instead of an arbitrary protocol when none is specified. It also warns that it takes this default behavior.

Baker / Endorser / Accuser

  • Added the --version flag.

  • Fixed the operation ordering in the baker so that the most profitable operations are applied first.

Protocol Compiler And Environment

  • Added the --version flag.


  • Added the --version flag.

  • Added support for some base encodings including arbitrary precision integers, n-bit sized integers, and floating point numbers.


  • Sapling: fixed dummy address generator (the last 5 bits are now correctly set to 0 instead of the first 5 bits).

  • Fixed a bug that caused some file descriptors to be leaked to external processes.

Version 8.3

Baker / Endorser / Accuser

  • Fixed a bug where the baker would not consider all of the operations when a costly one was encountered.

  • Fixed a bug where the most profitable operations would not be applied first.

Version 8.2


  • Override PtEdoTez activation by PtEdo2Zk in mainnet network.

  • Make size limits on p2p messages explicit in low-level encodings.

  • Add new RPCs for Edo: helpers/scripts/normalize_{data,script,type} and a XXX/normalized variant to each protocol RPC XXX outputting Michelson expressions.

Baker / Endorser / Accuser

  • Replace PtEdoTez by PtEdo2Zk.


  • Update external opam dependencies. In particular, switch to hacl-star.0.3.0-1 which performs better.

Version 8.1


  • Fix a performance regression affecting serialization of tz3 signatures by reverting the P256 implementation to uecc.

  • Fixup allowing nodes in --history-mode full to answer to all new messages to the distributed database protocol.


  • As a consequence of moving back to uecc, revert for now the ability to sign with tz3 addresses.


  • Allow building from sources with older version of git (used to require 2.18)

  • Downgrade mirage-crypto dependency to avoid failure on startup with illegal instruction on some hardware.

Version 8.0


  • Added two new bootstrap peers for Mainnet and one for Edonet.

  • Fixes a bug where any event would allocate more memory than needed when it were not to be printed.

  • Improved how the node stores buffered messages from peers to consume less memory.

  • Enforce loading of non-embedded protocols before starting the node allowing the prevalidator to start correctly.

  • Optimized the I/O and CPU usage by removing an unnecessary access to the context during block validation.

Docker Images

  • Bump up base image to alpine:12. In particular, it changes rust and python versions to 1.44.0 and 3.8.5 respectively.


  • Recommend rust version 1.44.0 instead of 1.39.0.

Version 8.0~rc2


  • Snapshots exported by a node using version 8 cannot be imported by a node running version 7. This is because the new snapshots contain additional information required by protocol Edo. On the other hand, snapshots exported by a node using version 7 can be imported by a node running version 8.

  • Added a new version (version 1) of the protocol environment. The environment is the set of functions and types that the economic protocol can use. Protocols up to Delphi used environment version 0. The Edo protocol uses environment version 1.

  • Added the Edo protocol: the node, client and codec now comes linked with Edo, and the Edo daemons (baker, endorser and accuser) are available.

  • Added a built-in configuration for Edonet, a test network that runs Edo. You can configure your node to use this test network with --network edonet.

  • Removed the built-in configuration for Carthagenet, which ends its life on December 12th 2020. You can no longer configure your node with --network carthagenet.

  • The bootstrap pipeline no longer tries to concurrently download steps from other peers. The result is actually a more efficient bootstrap, because those concurrent downloads resulted in multiple attempts to download the same block headers. It also resulted in more memory usage than necessary.

  • Added six messages to the distributed database protocol and bumped its version from 0 to 1. These new messages allow to request for: a peer’s checkpoint, the branch of a given protocol and a block’s predecessor for a given offset. These messages are not yet used but will be useful for future optimizations.

  • You can now specify the data directory using environment variable TEZOS_NODE_DIR. If you both set this environment variable and specify --data-dir, the latter will be used.

  • Added new RPC /config to query the configuration of a node.

  • Changed signal handling and exit codes for most binaries. The codes’ significance are detailed in the user documentation.

  • Command tezos-node --version now exits with exit code 0 instead of 1.

  • Fixed the synchronisation threshold which was wrongly capped with an upper bound of 2 instead of a lower bound of 2 when --connections was explicitely specified while the synchronisation threshold itself was not specified.


  • Added client command import keys from mnemonic, which allows to import a key from a mnemonic following the BIP39 standard.

  • When the client asks for a password, it no longer tries to hide its input if the client was not run from a terminal, which allows for use in a script.

  • You can now specify the base directory using environment variable TEZOS_CLIENT_DIR. If you both set this environment variable and specify --base-dir, the latter will be used.

  • Fixed command set delegate for <SRC> to <DLGT> to accept public key hashes for the <DLGT> field.

  • Fixed the rpc command that did not use the full path of the URL provided to --endpoint. Before this, --endpoint http://localhost:8732/node/rpc would have been equivalent to --endpoint http://localhost:8732.

  • Fixed an issue where the client would try to sign with a key for which the private counterpart was unknown even though a remote signer was connected.

Baker / Endorser / Accuser

  • Fixed a crash (assertion error) that could happen at exit, in particular if a baker were connected.

Docker Images

  • Docker images are now available for arm64. Image tags stay the same but now refer to “multi-arch” manifests.

Version 8.0~rc1


  • Fixed some cases where the node would not stop when interrupted with Ctrl+C.

  • The node’s mempool relies on a new synchronisation heuristic. The node’s behaviour, especially at startup, may differ slightly; log messages in particular are likely to be different. More information is available in the whitedoc.

  • The new synchronisation heuristic emits an event when the synchronisation status changes. This can be used to detect when the chain is stuck for example. More information is available in the whitedoc.

  • Node option --bootstrap-threshold is now deprecated and may be removed starting from version 9.0. Use --synchronisation-threshold instead.

  • Fixed an issue which prevented using ports higher than 32767 in the client configuration file.

  • The tezos-node run command now automatically generates an identity file as if you had run tezos-node identity generate if its data directory contains no identity file.

  • Improved various log messages and errors.

  • When bootstrapping, do not greylist peers in rolling mode whose oldest known block is newer than our head.

  • Made the timestamp in log messages more precise (added milliseconds).

  • Fixed encoding of P2P header message length for larger lengths.

  • Added -d as a short-hand for the --data-dir option of the node.

  • Added a built-in activator key for the built-in sandbox network. This allows to spawn a sandbox without the need for a custom genesis protocol.

  • Greylist the identity and address of peers that send malformed messages.

  • Fixed some cases where the context was not closed properly when terminating a node or if the baker failed to bake a block.

  • Removed the “get operation hashes” and “operation hashes” messages of the distributed database protocol. Those messages were never used.

  • Reduced the amount of log messages being kept in memory (that can be queried using RPCs) before they are discarded to reduce the total memory footprint.

  • Fixed a case where the /workers/prevalidator RPC could fail if there were too many workers.

  • Fixed how protocol errors are displayed. Before, there were printed using the cryptic consequence of bad union message.

  • Pruned blocks can now be queried using RPC /chains/<chain>/blocks/<block>. The metadata field will be empty in the response, leaving only the header.

  • Fixed handling of pre-epoch timestamps, in particular in RPCs.

  • Time is now output with millisecond precision when calling RPCs.

  • Fixed the /chains/<chain>/blocks RPC which sometimes did not return all blocks.

  • Improved the performance of the progress indicator when importing snapshots.

  • Improved performance of tezos-node snapshot export.

  • Fixed the node which sent too many “get current branch” messages to its peers on testchain activation.


  • The tezos-client config show command now takes into account the command line arguments.

  • Fixed an issue which caused tezos-client rpc get /errors as well as tezos-codec dump encodings to fail because of duplicate encodings. As a result, some protocol encodings whose name was not prefixed by the protocol name are now prefixed by it. If you have tools which rely on encoding names you may have to update them.

  • Added client command multiple transfers from <src> using <transfers.json> to perform multiple operations from the same address in a single command.

  • Added option --endpoint to client and bakers. It replaces options --addr, --port and --tls which are now deprecated.

  • Added command rpc patch to the client, to perform RPCs using the PATCH HTTP method.

  • Make the client emit a more human-readable error if it failed to understand an error from the node.

  • Added client commands tezos-client convert script <script> from <input> to <output> and tezos-client convert data <data> from <input> to <output> to convert to and from michelson, JSON, binary and OCaml with type-checking.

  • The client now retries commands a few times if the node is not yet ready.

  • Added client command compute chain id from block hash <hash> and compute chain id from seed <seed> to compute the chain id corresponding to, respectively, a block hash or a seed.

  • Added the verbose-signing switch to a number of multisig commands.

  • The prepare multisig commands now display the Blake 2B hash.

  • Some client commands which use the default zero key tz1Ke2h7sDdakHJQh8WX4Z372du1KChsksyU in dry runs now display this key using an informative string the baker who will include this operation instead of the key itself.

  • Fixed an error which occurred in the client when several keys had the same alias.

  • Added support for some rpc {get,post,...} commands in the client’s mockup mode.

  • Added --mode mockup flag to config init for the client’s mockup mode, that writes the mockup’s current configuration to files.

  • Added --mode mockup flag to config show for the client’s mockup mode, that prints the mockup’s current configuration to standard output.

  • Added arguments --bootstrap-accounts and --protocol-constants to the client’s create mockup command. --bootstrap-accounts allows changing the client’s bootstrap accounts and --protocol-constants allows overriding some of the protocol’s constants. Use commands config {show,init} mockup (on an existing mockup) to see the expected format of these arguments.

  • The client no longer creates the base directory by default in mockup mode.

  • Fixed the argument --password-filename option which was ignored if it was present in the configuration file.

Baker / Endorser / Accuser

  • The baker now automatically tries to bake again in case it failed. It retries at most 5 times.

  • The baker now outputs an explicit error when it loses connection with the node.

  • Added command-line option --keep-alive for the baker. It causes the baker to attempt to reconnect automatically if it loses connection with the node.

Protocol Compiler And Environment

  • Prepare the addition of SHA-3 and Keccak-256 cryptographic primitives.

  • Prepare the introduction of the new protocol environment for protocol 008.

  • The protocol compiler now rejects protocols for which the OCaml compiler emits warnings.


  • Fixed tezos-codec dump encodings which failed due to two encodings having the same name.

Version 7.5


  • Fixed gas cost estimation for Delphi for contract origination and revelation.


  • Fixed the name of the big_map_diff encoding from <protocol_name> to <protocol_name>.contract.big_map_diff.

Version 7.4

  • Added the Delphi protocol.

  • Added the Delphinet built-in network configuration. The alias to give to --network is delphinet.

  • Updated the list of bootstrap peers for Carthagenet.

Version 7.3

  • Fixed a case where the number of open file descriptors was not correctly limited. This could result in the node crashing due to being out of file descriptors.

  • Set a limit to the length of some incoming messages which previously did not have one.

  • Fixed some value encodings which were missing cases.

Version 7.2

  • Fixed an error that could cause baking to fail when validating some smart contracts.

  • Fixed an issue in which prevented to use some options, such as --rpc-port.

Version 7.1

Source Compilation

  • The Makefile now ignores directories with no lib_protocol/TEZOS_PROTOCOL files when listing protocols to compile. This fixes an error where make complained that it had no rule to build TEZOS_PROTOCOL for directories that Git does not completely remove when switching branches.

  • One can now use opam 2.0.0 again. In version 7.0, an error saying that it did not know about option --silent was emitted.

  • The repository no longer contains file names which are longer than 140 characters. Longer file names prevented users from checking out version 7.0 on encrypted file systems in particular.

  • Fixed an issue causing make build-deps to sometimes fail after an update of the digestif external library.


  • Optimized the LAMBDA which is built when injecting manager operations.

  • Fixed a bug which caused the wrong entrypoint (set_delegate instead of remove_delegate) from being used in some cases when setting delegates.

  • Command activate account ... with can now be given a JSON value directly as an argument instead of only a filename.

  • Syntax for command call from <SRC> to <DST> has been fixed to match the one for proto_alpha. It should now be called as call <DST> from <SRC>.

Version 7.0


  • Node and client now come with all current and past protocols that are still in use on Mainnet or some active test networks.

  • Added option --network to tezos-node config init to select which network to connect to from a list of built-in networks (e.g. carthagenet). If you do not run config init or run it without the --network option, the node will use the default network (Mainnet).

  • Added option --network to tezos-node run and tezos-node snapshot import which causes the node to check that it is configured to use the given network.

  • Added network configuration field to select which network to connect to, similar to --network. This field also lets you specify an entirely custom, non-built-in network and is especially useful to run private networks. For instance, LabNet ( uses such a custom configuration.

  • The network configuration field also allows to specify user-activated upgrades and user-activated protocol overrides. In the past, those upgrades and overrides required you to upgrade the node; now, you can just edit the configuration file instead. You can also disable built-in upgrades by specifying the configuration explicitly.

  • The network configuration field also allows to specify the parameters of the genesis protocol, such as the activation key of proto_genesis. This allows to use the same genesis protocol for several test networks with different activation keys.

  • The network name is printed in the logs on startup.

For more information, see:


  • Added RPC /version which returns the version of the node, the version of the P2P protocol, the version of the distributed DB, the commit hash and the commit date. Other RPCs which returned version numbers (/network/version, /network/versions and /monitor/commit_hash) are deprecated: use /version instead.

  • RPCs which returned treated and completed fields now return durations (relative to the value of the pushed field) instead of timestamps.

  • Improved various log messages and errors.

  • Fixed a memory leak causing greylisted addresses to be stored several times unnecessarily.

  • Fixed a small memory leak causing each new worker to store a logger section name forever.

  • When exporting snapshots, you can now specify the block not only by its hash but also by its level or using an alias such as: caboose, checkpoint, save_point or head.

  • Fixed a bug which caused snapshots to fail if the checkpoint was a protocol transition block.

  • Added --status flag to upgrade storage. This flag causes the node to tell you whether a storage upgrade is available.

  • Allow more files to exist in the data directory when starting a node from an empty storage: version.json, identity.json, config.json and peers.json. Before, only identity.json was allowed.

  • Fixed a bug which caused the check of the version.json file to be performed incorrectly.

  • The external validator process now dynamically loads the new protocol after a protocol upgrade.

  • Sandbox mode may now be used with the external validator process. Before, it required --singleprocess.

  • The mempool RPC for preapplication now actually sorts operations when the flag is set.

  • Changed the format of the peer-to-peer protocol version number. Nodes which are running a version older than Mainnet December 2019 can no longer connect to nodes running this new version and should upgrade.

  • Added new peer-to-peer message type: Nack, that carries a list of alternative peers and can be returned by nodes with no room for your connection.

  • If maximum number of connections has been reached, before rejecting peers, authenticate them and memorize their point information.

  • Improved the behavior of the greylist of peers.

  • The node is now capable of recovering from some cases of storage corruption that could in particular occur if the disk became full or if the node was killed.

  • Fixed a bug which caused the peer-to-peer layer to send the wrong acknowledgement message in response to swap requests.

  • Nodes built for Docker images should now correctly contain the version number.

  • Removed non-read-only Babylon client commands as they are no longer useful.

  • If the node connects to a peer of another network (e.g. if a Mainnet node connects to a Carthagenet node), it now removes this peer from its list of known peers. This in particular means that it will no longer advertize this peer or try to connect to it again.

  • In private mode, do not try to discover the local network peers as they will not be trusted anyway.

  • Fixed a bug which caused the node to stop with a segmentation fault.


  • Added protocol command expand macros in to expand macros in Michelson code.

  • Added command tezos-admin-client protocol environment which displays the version of the environment used by a given protocol.

  • Greatly reduce the time the client takes to load.

  • Added option --mode mockup which can be used to run client commands, such as commands to typecheck Michelson code, without a running node.

  • Added commands create mockup for protocol and list mockup protocols to manage mockup environments used by --mode mockup.

  • Multisig commands can now be used both with contract aliases and addresses instead of only with aliases.

  • Added a timeout to signature operations using a remote signer, which could otherwise block the baker, endorser or accuser.


  • Added safety checks against code injection when compiling downloaded or injected protocols. This was mostly a security concern for nodes with publicly available RPCs.

  • Added new demo protocol: proto_demo_counter.

  • Prepared the shell to be able to handle multiple protocol environment versions.

Docker Script

  • Renamed script into You should still use and as they are now symbolic links to instead of

  • Removed script as Zeronet is using an older version of Babylon (PsBABY5H) for which the baker, endorser and accuser binaries are no longer available. If you need to connect to Zeronet, use the zeronet branch instead, which still has the script.


  • Remove outdated nginx.conf.