# Glossary

**Algorithmic Proof**

A mathematical or computational method used to verify the accuracy or trustworthiness of data without requiring third-party validation.

**Bearer Proof**

A cryptographic proof that verifies inclusion in a dataset without needing access to the entire set. It allows for secure, lightweight data ownership confirmation.

**Block Reward**

The amount of XL1 tokens given to a block producer for successfully generating a new block on the XYO Layer One Blockchain.

**Block Validator Node**

A type of XYO node that confirms the validity of new blocks before finalization. Validators are key to slashing dishonest actors and maintaining integrity.

**Block Producer Node**

A node that builds blocks by selecting transactions from the pending pool and producing the corresponding cryptographic payloads.

**Bound Witness**

A core concept in XYO’s Proof of Origin protocol, representing cryptographic validation of a data event or interaction between multiple parties.

**Bound Witness Tree (BWT)**

A rollup structure made up of multiple Bound Witnesses organized in a tree format. Enables fast validation by referencing a single root hash.

**Byzantine Action**

Malicious or faulty behavior in a distributed system that violates consensus rules—such as submitting invalid blocks.

**Chain of Chains**

The architecture that allows independent XYO Proof of Origin chains to unify into a shared state on the XYO Layer One Blockchain.

**Efficiency Node**

A supporting node that maintains reference data (e.g., balances) to speed up block validation and reduce redundant computations.

**Finalization**

The process by which a block is confirmed as immutable and beyond the slashing window. Ensures the chain’s state is considered reliable.

**Framing Cursor**

A pointer system that divides the blockchain into retrievable “frames” or segments for optimized navigation and data lookup.

**Gas Fee**

A fee paid in XL1 to cover the cost of executing transactions and smart contract operations on the blockchain.

**Genesis Era**

The initial token distribution phase for XL1.

**Lookback Window**

A mechanism that limits the amount of historical data nodes must actively maintain—focusing on recent transactions for scalability.

**Participation Transaction**

A transaction submitted by a node to prove it was actively contributing to the network, even if its actions left no visible record.

**Proof of Location**

An original XYO protocol validating that a specific piece of data originated from a trusted source or device.

**Proof of Origin**

An original XYO protocol validating that a specific piece of data originated from a trusted source or device.

**Proof of Participation**

A system that enables nodes to receive rewards for invisible work by allowing them to submit attestations of their activity.

**Proof of Perfect (PoP)**

An algorithm that ranks data points—like chain heads—by how close they are to being “perfect” in accuracy and trustworthiness.

**Priority Fee**

An optional XL1 fee offered to block producers to incentivize faster inclusion of a specific transaction.

**Rollup**

A technique that bundles multiple transactions into a single proof, reducing on-chain data load and increasing throughput.

**Slashing**

The penalty mechanism by which staked tokens are destroyed or reallocated due to bad behavior or protocol violations.

**Smart Contract**

A self-executing agreement encoded in software that runs on the blockchain and performs operations without intermediaries.

**Stake / Staking**

Locking tokens into the blockchain protocol to secure the network, participate in consensus, or earn rewards.

**Step Hash**

A structure that groups blocks into progressively larger clusters, enabling faster lookup and validation through logarithmic navigation.

**Step Reward**

A large-scale reward distributed at key block milestones from a shared pool, incentivizing validators and long-term contributors.

**Transaction Pool**

A list of unconfirmed transactions awaiting inclusion in the next block by block producers.

**Zero-Knowledge Proof (ZKP)**

A cryptographic method that allows verification of a claim without revealing the underlying data—used in Rollups for privacy and efficiency.