About this release

This is a maintenance Lima release.

It:

• Fixes an issue where some nodes are stuck and could not sync beyond a certain point.

• Exports a function (aec_chain_state:grant_fees/5) in order to be used in the MDW while doing dry runs.

• Improves the transaction pool to not allow in paying_for transactions that are incorrectly authenticated.

• Improves node performance: use a dirty read when possible while checking a signed transaction

• Introduces some refactoring that is a prerequisite in order to accommodate contract clone primitives.

• Transaction lifecycle is: the transaction is being prepared and posted to a node, then if it is valid it lands in the mempool, it is gossiped to all peers in the network, it is picked by a miner and then included in a block. If a transaction stays in the pool for too long time (2 weeks) and is not included in a block, there might be an issue with it (ex. origin doesn't have enough tokens to spend) and it is garbage collected. There used to be a check ensuring GCed transactions do not end up in the mempool ever again. This PR disables this check.

• An optional setting for transaction garbage collect TTL is available for the node operator to set. It is mempool.tx_ttl and its default value is 2 weeks.

• The transaction pool is being protected by DDos attacks via a caching layer so only new transactions ever reach the pool. There is a new setting for the node operator to define the cache size in amount of transactions to keep. It is mempool.cache_size with a default value of 200.

• Introduced key-header index and fast implementation offind_key_headers_and_hash_at_height using it. This greatly improves performance of BLOCKHASH opcode for both AEVM and FATE.

• Fixes a bug when using HTTP API to fetch contract call data at an already GCed height.

Please join the mainnet by following the instructions in the documentation below, and let us know if you have any problems by opening a ticket. Troubleshooting of common issues is documented in the wiki.

Documentation

For an overview of the installation process for different platforms, building the package from source, configuration and operation of the Aeternity node please refer to Aeternity node documentation.