mempool

This is an optional section used by the mempool indexer plugin. It uses contracts and datasources aliases as well as the database connection.

Mempool configuration has two sections: settings and indexers (required).

{% page-ref page="../advanced/mempool-plugin.md" %}

Settings

This section is optional so are all the setting keys.

mempool:
  settings:
    keep_operations_seconds: 172800
    expired_after_blocks: 60
    keep_in_chain_blocks: 10
    mempool_request_interval_seconds: 10
    rpc_timeout_seconds: 10
  indexers:
    ...

keep_operations_seconds

How long to store operations that did not get into the chain. After that period, such operations will be wiped from the database. Default value is 172800 seconds (2 days).

expired_after_blocks

When level(head) - level(operation.branch) >= expired_after_blocks and operation is still on in chain it's marked as expired. Default value is 60 blocks (~1 hour).

Since the main purpose of this plugin is to index mempool operations (actually it's a rolling index), all the operations that were included in the chain are removed from the database after specified period of time. Default value is 10 blocks (~10 minutes).

mempool_request_interval_seconds

How often Tezos nodes should be polled for pending mempool operations. Default value is 10 seconds.

rpc_timeout_seconds

Tezos node request timeout. Default value is 10 seconds.

Indexers

You can index several networks at once, or index different nodes independently. Indexer names are not standardized, but for clarity it's better to stick with some meaningful keys:

 mempool:
   settings:
     ...
   indexers:
     mainnet:
       filters:
         kinds:
           - transaction
         accounts:
           - contract_alias
       datasources:
         tzkt: tzkt_mainnet
         rpc: 
           - node_mainnet
     edonet:
     florencenet:

Each indexer object has two keys: filters and datasources (required).

Filters

An optional section specifying which mempool operations should be indexed. By default all transactions will be indexed.

kinds

Array of operations kinds, default value is transaction (single item).
The complete list of values allowed:

activate_account
ballot
delegation*
double_baking_evidence
double_endorsement_evidence
endorsement
origination*
proposal
reveal*
seed_nonce_revelation
transaction*

* — manager operations.