TYPE 0x0504 · ANCHOR FAMILY

ANCHOR_RESERVE

Reserve and federation anchor. Verifies an N-of-M threshold guardian set with a committed guardian set hash. Used to anchor federated sidechain parameters and multi-guardian reserve configurations.

Anchor Invertible

Ladder Diagram

Fields

Field	Data Type	Size	Side	Description
threshold_n	NUMERIC	1-4 B	Conditions	Required number of guardian signatures (first NUMERIC field)
threshold_m	NUMERIC	1-4 B	Conditions	Total number of guardians (second NUMERIC field)
guardian_set_hash	HASH256	32 B	Conditions	Hash committing to the full guardian pubkey set

No witness fields required. The threshold parameters and guardian set hash are committed in conditions.

Wire Format Breakdown

0x0504 0 3 NUMERIC · 3B NUMERIC · 3B HASH256 · 32B Conditions = 48 bytes

0x0504 0 0 Witness = 4 bytes (empty block)

Total 52 bytes

Evaluation Logic

1.Extract 2 NUMERIC fields: threshold_n (first) and threshold_m (second)

2.If fewer than 2 NUMERIC fields → ERROR

3.Extract HASH256 field for guardian_set_hash

4.If no HASH256 field present → ERROR

5.If threshold_n > threshold_m → UNSATISFIED

6.Otherwise → SATISFIED

Return Values

Condition	Result
Fewer than 2 NUMERIC fields	ERROR
Missing HASH256 field	ERROR
threshold_n > threshold_m	UNSATISFIED
n ≤ m with hash present	SATISFIED

JSON Wire Format

Conditions (3-of-5 guardian reserve)

{
  "type": "ANCHOR_RESERVE",
  "inverted": false,
  "fields": [
    { "type": "NUMERIC", "value": 3 },
    { "type": "NUMERIC", "value": 5 },
    { "type": "HASH256", "hex": "c7d8e9f0...guardian set hash...32 bytes" }
  ]
}

Anchors a 3-of-5 threshold guardian set. The hash commits to the ordered list of all 5 guardian pubkeys.

Use Cases

Federated Sidechain Anchors

Anchor the federation parameters of a sidechain on the main chain. The threshold and guardian set hash define who controls the peg, providing an auditable on-chain record of the federation configuration.

Multi-guardian Reserves

Commit reserve custody parameters on-chain. An N-of-M guardian set controls the reserve, with the hash binding to the specific guardian pubkeys. Enables transparent proof-of-reserves with verifiable custody thresholds.

← ANCHOR_POOL ANCHOR_SEAL →