In the context of MultiversX, the "metachain" is a core component of its network architecture, responsible for coordinating activity across the blockchain's multiple shards. MultiversX achieves scalability through adaptive state sharding, where the network is divided into smaller sections (shards) that process transactions and smart contracts in parallel.
The metachain acts as a central coordinator, ensuring consistency, fairness, and security across all shards. Specifically, it handles:
- Cross-shard communication and data aggregation
- Meta-consensus and validation of blocks from all shards
- Critical operations such as calculating randomness sources for node shuffling and determining which nodes are redistributed among shards. This helps enhance network security and prevents collusion within shards12.
As a result, the metachain plays a fundamental role in maintaining the integrity and seamless operation of the entire MultiversX blockchain ecosystem
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