TYPE 0x0506 · ANCHOR FAMILY

ANCHOR_ORACLE

Oracle anchor. Verifies an oracle pubkey and outcome count. Used for DLC oracle attestations, price feed anchoring, and event outcome commitments.

Anchor Invertible

Ladder Diagram

Fields

Field	Data Type	Size	Side	Description
outcome_count	NUMERIC	1-4 B	Conditions	Number of possible outcomes (must be > 0)

Public key folded into Merkle leaf via merkle_pub_key (PubkeyCountForBlock = 1). No key field in conditions.

No witness fields required. The outcome count is committed in conditions.

Wire Format Breakdown

0x0506 0 2 PUBKEY · 33B NUMERIC · 3B Conditions = 44 bytes

0x0506 0 0 Witness = 4 bytes (empty block)

Total 48 bytes

Evaluation Logic

1.Extract PUBKEY field for oracle_key (verified via Merkle leaf)

2.If no pubkey field present → ERROR

3.Read outcome_count from NUMERIC field

4.If outcome_count ≤ 0 → UNSATISFIED

5.Otherwise → SATISFIED

Return Values

Condition	Result
Missing pubkey field (no oracle key)	ERROR
Missing NUMERIC field	ERROR
outcome_count ≤ 0	UNSATISFIED
Pubkey present + outcome_count > 0	SATISFIED

JSON Wire Format

Conditions (oracle with 3 possible outcomes)

{
  "type": "ANCHOR_ORACLE",
  "inverted": false,
  "fields": [
    { "type": "PUBKEY", "hex": "02f1a2b3...oracle public key...33 bytes" },
    { "type": "NUMERIC", "value": 3 }
  ]
}

Anchors an oracle attestation with 3 possible outcomes (e.g., home win, draw, away win). The oracle key identifies who will sign the outcome.

Use Cases

DLC Oracle Attestations

Anchor Discreet Log Contract oracle parameters on-chain. The oracle key identifies the attestor, and the outcome count defines the event space. Contract execution branches are determined by which outcome the oracle signs.

Price Feed Anchoring

Commit a price oracle's key and the number of price buckets on-chain. Enables trustless price-dependent contracts where the oracle attests to which price range was reached, without revealing the exact price.

Event Outcome Commitment

Anchor the parameters for any real-world event with discrete outcomes. Sports results, election outcomes, or weather events can be committed with a specific oracle and outcome count, enabling conditional contract execution.

← ANCHOR_SEAL DATA_RETURN →