{ "meta": { "title": "Bitcoin Node Relay-Policy & Template-Composition Matrix", "description": "Relay/mempool policy defaults of 6 Bitcoin node implementations (datacarrier/OP_RETURN, bare multisig, dust, full-RBF, inscription filtering) mapped to what each includes in a self-built block template.", "generated": "2026-07-17T16:01:59+00:00", "version": "1.0", "license": "https://creativecommons.org/licenses/by/4.0/", "license_name": "CC BY 4.0", "source": "https://d-central.tech/bitcoin-node-relay-policy/", "record_count": 6, "disclaimer": "Point-in-time snapshot (July 2026). These are DEFAULT relay/mempool POLICY settings (standardness, not consensus) — every value is configurable and defaults change between releases. Verified against each project's release notes/docs; re-verify at the source before relying on it. \"Template effect\" describes what a block you build with default policy would include/exclude, relevant when you run your own templates via Stratum V2 job declaration or DATUM." }, "rows": [ { "id": "bitcoin-core", "name": "Bitcoin Core", "version": "v30.x", "repo": "https://github.com/bitcoin/bitcoin", "datacarrier_default": "Enabled (relayed)", "datacarrier_size": "100,000 B (v30; ~unlimited)", "multi_opreturn": "Standard (multiple)", "bare_multisig": "Relayed", "dust_threshold": "3000 sat/kvB (~546 P2PKH)", "full_rbf": "On by default (v28+)", "truc_v3": "Yes (v3/TRUC, ephemeral dust, P2A)", "max_mempool": "300 MB", "filters_inscriptions": "No — relays", "template_effect": "Includes large and multiple OP_RETURN data (up to ~100 kB aggregate), bare multisig, TRUC/v3 packages and Taproot inscription/ordinal witness txs; excludes only true sub-dust and genuinely non-standard scripts.", "source": "Bitcoin Core 30.0 release notes; src/policy/policy.h (DEFAULT_ACCEPT_DATACARRIER=true, datacarriersize=100000, DEFAULT_PERMIT_BAREMULTISIG=true, DEFAULT_DUST_RELAY_TX_FEE=3000); PR #32406 (multiple OP_RETURN); PR #30493 (full-RBF default, v28)" }, { "id": "bitcoin-knots", "name": "Bitcoin Knots", "version": "v29.3.knots (v29-based)", "repo": "https://github.com/bitcoinknots/bitcoin", "datacarrier_default": "Enabled but capped", "datacarrier_size": "83 B (temporary; intent to revert to 42)", "multi_opreturn": "Non-standard (shared 83 B budget)", "bare_multisig": "Not relayed", "dust_threshold": "3000 sat/kvB + sub-dust fee penalty", "full_rbf": "On (always)", "truc_v3": "Yes (from v29 base)", "max_mempool": "300 MB", "filters_inscriptions": "Yes — filters", "template_effect": "Excludes inscriptions/ordinals, oversized or multiple OP_RETURN data (>83 B total), bare multisig and dust — a minimal-data-spam template of financial-looking transactions.", "source": "Knots v29.3.knots20260508 src/policy/policy.h (MAX_OP_RETURN_RELAY=83, DEFAULT_PERMIT_BAREMULTISIG=false, DEFAULT_DATACARRIER_FULLCOUNT=true, RBFPolicy::Always); v29.2.knots20251110 notes (42->83 temporary). Still Core-v29-based (did NOT rebase to v30)." }, { "id": "btcd", "name": "btcd", "version": "v0.24.x (Go)", "repo": "https://github.com/btcsuite/btcd", "datacarrier_default": "Enabled (hardcoded)", "datacarrier_size": "80 B (fixed, no runtime knob)", "multi_opreturn": "Non-standard (1 max)", "bare_multisig": "Relayed (<=3 keys)", "dust_threshold": "1000 sat/kvB min-relay (~546 P2PKH)", "full_rbf": "BIP125 opt-in only (no full-RBF)", "truc_v3": "No", "max_mempool": "No byte cap (fee/expiry-bounded)", "filters_inscriptions": "No — relays", "template_effect": "Legacy-Core-style, by hardcoded standardness rather than a policy toggle: includes one <=80 B OP_RETURN and bare multisig; excludes large/multiple OP_RETURN and TRUC — more restrictive than Core v30.", "source": "btcsuite/btcd mempool/policy.go, txscript/standard.go (MaxDataCarrierSize=80)" }, { "id": "bcoin", "name": "bcoin", "version": "v2.2.x (JS; low maint.)", "repo": "https://github.com/bcoin-org/bcoin", "datacarrier_default": "Enabled", "datacarrier_size": "80 B data / 83 B script (fixed)", "multi_opreturn": "Non-standard (1 max)", "bare_multisig": "Relayed", "dust_threshold": "1000 sat/kB (~546 P2PKH)", "full_rbf": "Opt-in RBF, off by default", "truc_v3": "No", "max_mempool": "~100 MB", "filters_inscriptions": "No — relays", "template_effect": "Legacy-Core-style templates (one <=80 B OP_RETURN, bare multisig; no oversized data or TRUC). Low ongoing maintenance.", "source": "bcoin-org/bcoin lib/protocol/policy.js (MAX_OP_RETURN 80/83, BARE_MULTISIG=true)" }, { "id": "libbitcoin", "name": "Libbitcoin", "version": "libbitcoin v4 (toolkit)", "repo": "https://github.com/libbitcoin/libbitcoin-node", "datacarrier_default": "N/A", "datacarrier_size": "", "multi_opreturn": "N/A", "bare_multisig": "N/A", "dust_threshold": "N/A", "full_rbf": "N/A", "truc_v3": "N/A", "max_mempool": "N/A (no policy mempool)", "filters_inscriptions": "N/A", "template_effect": "A full-validation C++ library/node toolkit, not a Core-style relay-policy node: it validates and stores/relays blocks and fee-qualifying txs but exposes no OP_RETURN / dust / bare-multisig / RBF policy knobs, so it offers no configurable template policy.", "source": "libbitcoin/libbitcoin-node README; libbitcoin-server FAQ" }, { "id": "floresta", "name": "Floresta", "version": "v0.9.x (Rust / utreexo)", "repo": "https://github.com/vinteumorg/Floresta", "datacarrier_default": "N/A", "datacarrier_size": "", "multi_opreturn": "N/A", "bare_multisig": "N/A", "dust_threshold": "N/A", "full_rbf": "N/A", "truc_v3": "N/A", "max_mempool": "N/A (no tx relay yet)", "filters_inscriptions": "N/A", "template_effect": "A utreexo compact-accumulator validation client with an integrated Electrum server; as of v0.9.x it has no transaction relay or policy mempool, so it does not build or relay policy templates at all.", "source": "vinteumorg/Floresta release notes (v0.8-0.9)" } ] }