Stake-weighted Quality of Service (swQoS) is a core mechanism in Solayer’s architecture that governs the allocation of network resources. This system dynamically distributes block space and transaction processing capacity based on the SOL delegated to validators.

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Key Concepts

  1. Proportional Resource Allocation: Validators receive network resources proportional to their delegated SOL.
  2. Sybil Attack Resistance: Higher delegations provides increased resistance against Sybil attacks.
  3. Commercial Benefits: RPC infrastructure operators and validator nodes gain advantages in transaction inclusion and capacity.

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Technical Implementation

The swQoS system operates on the following principles:
  1. Packet Transmission Rights: A validator’s right to transmit packets to the epoch leader is directly proportional to their delegations.
  2. Priority Queueing: Transactions from larger validators receive priority in block inclusion.

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Example Scenario

Consider two validators:
  • Validator A: 2% of staked SOL
  • Validator B: 0.2% of staked SOL
In this scenario:
  • Validator A can submit up to 2% of packets to the block producer
  • Validator B is limited to 0.2% of packet submissions
swQoS Diagram

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Transaction Weighting

In the swQoS system:
  1. Each transaction carries a “weight” based on delegations.
  2. Higher-weight transactions have a greater probability of inclusion in the next block.
  3. Increased delegations correlates with higher quality of service and improved resilience against potential malicious activities from lower-delegation validators.
This mechanism ensures a fair, proportional distribution of network resources, incentivizing higher commitments while maintaining network security and efficiency.