mud-indexing

Development

Help users index MUD Store events, process on-chain table mutations, store in PostgreSQL or EF Core, normalise schemas, run continuous sync. Use when users mention MUD indexing, Store events, MUD PostgreSQL, MUD EF Core, StoreEventsLogProcessingService, or building an indexer for MUD World data.

QUICK START

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MUD Store Event Indexing with Nethereum

Every MUD table mutation emits a Store event. By processing these events, you can rebuild the complete state of any MUD World and store it in PostgreSQL with typed relational tables.

When to Use This Skill

User wants to index MUD World state off-chain
User needs to process Store events into a database
User wants PostgreSQL tables mirroring MUD schemas
User mentions StoreEventsLogProcessingService, MUD normalisation, or MUD repositories

Required Packages

dotnet add package Nethereum.Mud.Contracts

# For PostgreSQL normalisation:
dotnet add package Nethereum.Mud.Repositories.Postgres

# For EF Core (any database):
dotnet add package Nethereum.Mud.Repositories.EntityFramework

Quick Start: In-Memory

var storeEventsService = new StoreEventsLogProcessingService(web3, worldAddress);
var repository = new InMemoryTableRepository();
await storeEventsService.ProcessAllStoreChangesAsync(repository);
// repository now contains full current state

PostgreSQL Normalisation

var normaliser = new MudPostgresStoreRecordsNormaliser(connectionString, worldAddress);
await normaliser.UpsertAsync(repository);

Creates typed PostgreSQL tables: {namespace}__{tableName} with proper column types.

Query Normalised Tables

var queryService = new NormalisedTableQueryService(connectionString);
var tables = await queryService.GetAvailableTablesAsync();
var results = await queryService.QueryAsync("app__Player", limit: 100);
var count = await queryService.CountAsync("app__Player");

Continuous Sync

var processor = storeEventsService.CreateProcessor(
    repository,
    blockProgressRepository: new InMemoryBlockchainProgressRepository(),
    numberOfBlocksPerRequest: 1000);

await processor.ExecuteAsync(cancellationToken);

Processing from Transaction Receipt

var receipt = await playerService.SetRecordRequestAndWaitForReceiptAsync(key, value);
await StoreEventsLogProcessingService.ProcessAllStoreChangesFromLogs(repository, receipt);

Storage Decision Table

Strategy	Best For
`InMemoryTableRepository`	Development, testing
`MudEFCoreTableRepository`	Any EF Core database, simple persistence
PostgreSQL normalisation	Production, analytics, explorer UIs

For full documentation, see: https://docs.nethereum.com/docs/mud-framework/guide-mud-indexing