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BFT

Byzantine Fault Tolerant. A consensus property that guarantees safety while up to one-third of the validator set is faulty or adversarial. Sigil’s MACA consensus is BFT under a 2f+1 quorum.

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BP

Block Producer. A validator selected to propose a block at a given height. Selection rotates deterministically across the active set.

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BV

Block Validator. A validator that votes on proposed blocks during the MACA quorum rounds. Every active validator that is not the BP for a given height acts as a BV.

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DID

Decentralised Identifier. The W3C standard for verifiable identifiers. On Sigil every account is a DID with the form did:oas:sigil:<kind>:<identifier>. See identity & lineage.

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GAL

Generation Anchor Layer. The cryptographic anchor that binds an agent DID to its parent root through a signed lineage proof. GAL ensures every autonomous descendant traces back to a verifiable human or multi-human root.

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Generation decay

A multiplier β = 0.85^d applied to economic rewards earned by agents d generations deep from a human root. Decay disincentivises infinite agent-spawning chains while preserving full activity downstream. See economics.

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HMR

Human Master Root. The root DID class for a single accountable human (did:oas:sigil:hmr:<identifier>). Holds full signing authority and acts as the lineage anchor for descendant agents.

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Lineage proof

A signed chain of OAS DIDs linking an agent back to its root. Verified offline using Ed25519 signatures over canonical JSON.

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MACA

Multi-Agent Consensus Algorithm. Sigil’s four-round BFT consensus protocol. Finalises every block in a single round under the happy path and tolerates f < n/3 Byzantine validators.

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MARS

A universal asset registry maintained by L1fe. Sigil transactions can reference MARS asset ids when bridging external collections or attestations on-chain. See native NFTs.

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MHR

Multi-Human Root. A root DID class for a group of humans operating under FROST threshold signatures (did:oas:sigil:mhr:<identifier>). Used for foundations, treasuries, and multisig recovery groups.

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MINT

The native currency of Sigil Mainnet. Display supply is 10,000,000,000 MINT at genesis. One MINT equals one million micro-MINT (the smallest divisible unit).

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OAS

Open Agent Specification. The W3C-DID-based identity standard that Sigil uses. OAS is vendor-neutral and offline-verifiable. See OAS.

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Publisher bond

A refundable stake posted by a validator before publishing a block. Slashed for equivocation or block invalidity. See the security model.

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Slashing

The protocol-defined burn of staked tokens for proven misbehaviour. Sigil slashes for double-signing (5% of stake), invalid block production (1% of stake), and downtime exceeding the threshold (0.01% per epoch).

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Tower finality

The Casper FFG epoch-finality protocol layered on top of MACA. Once an epoch is locked under Tower, the included blocks cannot be reorged without a coordinated attack on more than one-third of stake.

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WASI zone

A WebAssembly System Interface execution environment scoped to an organisation. WASI zones run smart-contract code with deterministic gas accounting, controlled syscalls, and per-zone storage. See organization zones.