This document describes the format used to serialize Elements block headers.
The relevant C++ serialization code is in src/primitives/block.h
Notes:
-
Fields in the following tables are serialized in the order they are listed, from top to bottom.
-
The Byte Order column shows the Endianness of the serialized bytes.
-
In the LiquidV1 chain, Dynamic Federations (DynaFed) has been active since block height
1517040.
Inherited from Bitcoin, Elements encodes the lengths of vectors using an encoding "known inside the Bitcoin Core codebase as the CompactSize encoding, though it has historically been referred to in external protocol documentation as VarInt."
- If the length of the vector is less than 253, then 1 byte is used to encode the value itself.
- If the length is 253 up to 65535 (uint16 max), then the length is encoded as
0xFD+ 2 bytes for the value. - If the length is 65536 up to 4294967295 (uint32 max), then the length is encoded as
0xFE+ 4 bytes for the value. - If the length is larger than 4294967295, then the length is encoded as
0xFF+ 8 bytes for the value.
All values above are encoded in little endian.
Link to Elements source: src/serialize.h
Pre-DynaFed Headers
Before block height
1517039, DynaFed was not yet active on LiquidV1.
| Field | Required | Size | Data Type | Byte Order | Notes |
|---|---|---|---|---|---|
| Version | Yes | 4 bytes | int32_t |
little endian | Normally 0x2000000 (decimal 536870912) unless additional version bits signalling |
| Previous Block Hash | Yes | 32 bytes | uint256 |
little endian | Hashes are serialized in reverse byte order |
| Merkle Root | Yes | 32 bytes | uint256 |
little endian | |
| Timestamp | Yes | 4 bytes | uint32_t |
little endian | Unix time |
| Block Height | No | 4 bytes | uint32_t |
little endian | Included when option -con_blockheightinheader=1, which is active for LiquidV1 |
| Proof | Yes 1 | Variable | CProof |
Required when -con_signed_blocks=1, which was active for LiquidV1 pre-dynafed |
|
| Bits | Yes 2 | 4 bytes | uint32_t |
little endian | Required when -con_signed_blocks=0 |
| Nonce | Yes 2 | 4 bytes | uint32_t |
little endian | Required when -con_signed_blocks=0 |
- Proof is only required for signed blockchains.
- Bits and Nonce are required for Proof of Work blockchains. See Bitcoin docs.
| Field | Required | Size | Data Type | Notes |
|---|---|---|---|---|
| Challenge | Yes | Variable | CScript |
Block "public key" |
| Solution | Yes | Variable | CScript |
Satisfying witness to the challenge, or nothing |
DynaFed Headers
DynaFed has been active on LiquidV1 from block height 1517040 onwards.
| Field | Required | Size | Data Type | Byte Order | Notes |
|---|---|---|---|---|---|
| Version | Yes | 4 bytes | int32_t |
little endian | Dynafed version is 0xa0000000 (2684354560) which is the normal version 0x20000000 bitwise OR'd with the dynafed mask 0x80000000 1 |
| Previous Block Hash | Yes | 32 bytes | uint256 |
little endian | Hashes are serialized in reverse byte order |
| Merkle Root | Yes | 32 bytes | uint256 |
little endian | |
| Timestamp | Yes | 4 bytes | uint32_t |
little endian | Unix time |
| Block Height | No | 4 bytes | uint32_t |
little endian | Included when option -con_blockheightinheader=1, which is active for LiquidV1 |
| DynaFed Parameters | Yes | Variable | DynafedParams |
||
| Signblock Witness | Yes | Variable | vector<vector<unsigned char>> |
The witness is not serialized for hashes or weight calculation |
- Elements removes the DynaFed mask during deserialization. The DynaFed version mask is
0x80000000.
| Field | Required | Size | Data Type | Notes |
|---|---|---|---|---|
| Current | Yes | DynaFedParamEntry |
The active DynaFed parameters at this height | |
| Proposed | Yes | DynaFedParamEntry |
The proposed DynaFed parameters for the next epoch |
In DynaFed, the chain is initialized with a dynamic epoch length. This is the number of blocks that Dynamic Federation voting and enforcement are in effect for. In Liquid this value is 20160 blocks, approximately 2 weeks. When DynaFed is active, the Current parameters will always either be a Full set of all fields in the DynaFedParamEntry (given below), or a set of Compact parameters indicating no change since the previous Full parameters. During a normal non-proposing epoch, the Proposed parameters will be Null, indicating that no change in the Federation is being proposed for the next epoch. During a proposing epoch, block producers will include their intended parameters in the Proposed field, either as Full parameters or Compact parameters committing to their previous proposal.
In order for a Proposed entry to be locked-in, at the end of the proposing epoch at least 4/5 blocks in that epoch must agree on the same Proposed parameters. If that condition is satisfied, then in the following epoch those Proposed parameters will become the Current parameters. There is a configurable total_valid_epochs consensus setting that defines how many epochs a given fedpegscript is valid for. In Liquid, this value is 2, meaning that once Proposed parameters become Current (ie. a successful transition), the fedpegscript of the previous epoch is valid for a grace period of 1 more epoch.
| Field | Required | Size | Data Type | Byte Order | Notes |
|---|---|---|---|---|---|
| Entry Type | Yes | 1 byte | unsigned char |
0 -> Null params, 1 -> Compact params, 2 -> Full Params |
|
| Signblock Script | Entry Types 1 & 2 | CScript |
"scriptPubKey" used for block signing | ||
| Signblock Witness Limit | Entry Types 1 & 2 | 4 bytes | uint32_t |
little endian | Maximum size in bytes of the size of a blocksigning witness |
| Elided Root | Entry Type 1 only | 32 bytes | uint256 |
Only non-zero when Entry Type is 1 (pruned/compact). This hash commits to the pruned fields, which are considered unchanged since the last Full params entry. | |
| Fed Peg Program | Entry Type 2 only | CScript |
The "scriptPubKey" of the fedpegscript | ||
| Fed Peg Script | Entry Type 2 only | CScript |
The witnessScript for witness v0, or otherwise undefined. | ||
| Extension Space | Entry Type 2 only | vector<vector<unsigned char>> |
Interpreted as pairs of Pegout Authorization Keys (PAKs) on LiquidV1 |
| Block Height | Block Hash | Link to header hex |
|---|---|---|
1517039 |
33a0890bea61d70b9dd1bd23f12e447730336906a44cdea621cba6d65fe90013 |
blockstream.info |
4 bytes - version (0x20000000 | 0x02000000 - 25th bit dynafed signalling)
00000022
32 bytes - previous block hash
f66be8726f4afecc9a7b087a78cd25edd53485755d26e456d546bcc0613a30f9
32 bytes - Merkle root
58427ea62f97951868724d09a55fd7808093f4b8c3a01cd96d4203f02759e877
4 bytes - timestamp (1633382159)
0f6f5b61
4 bytes - block height (1517039)
ef251700
proof
challenge
1 byte - compactsize identifier (253 = 2 byte length)
fd
2 bytes - number of bytes of challenge (513)
0102
513 bytes - challenge
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
solution
1 byte - compactsize identifier (253 = 2 byte length)
fd
2 bytes - number of bytes of challenge (790)
1603
790 bytes - solution
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
| Block Height | Block Hash | Link to header hex |
|---|---|---|
1517040 |
1f8d44d6a34987f59cd19061d0af7b8734ab9129737397a95fc85ba38309ca3d |
blockstream.info |
4 bytes - version (0x20000000 | 0x80000000)
000000a0
32 bytes - previous block hash
1300e95fd6a6cb21a6de4ca40669333077442ef123bdd19d0bd761ea0b89a033
32 bytes - Merkle root
b4a1253a088ffa22a87ac183bd9bceff1ec5d74f15c3cab5e8cf6f2eefbb216c
4 bytes - timestamp (1633462198)
b6a75c61
4 bytes - block height (1517040)
f0251700
current dynafed params entry
1 byte - dynafed param entry type (2 = full)
02
signblock script
1 byte - number of bytes of script (34)
22
34 bytes - signblock script
0020e51211e91d9cf4aec3bdc370a0303acde5d24baedb12235fdd2786885069d91c
4 bytes - signblock witness limit (1416)
88050000
fedpeg program
1 byte - number of bytes of script (23)
17
23 bytes - fedpeg program
a9149e10aa3d2f248e0e42f9bab31e858240e7ed40e487
fedpeg script
1 byte - compactsize identifier (253 = 2 byte length)
fd
2 bytes - number of bytes of script (628)
7402
628 bytes - fedpeg script
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
extension space
1 byte - number of items in vector (40)
28
1 byte - number of bytes of first item (66)
42
66 bytes - pair of public keys
02555f97c44ad9286ef060a02b00e8e6be2626ed3eb9230705d3ca2f977daae61e03cddbc847f64f898b883d717a7f637bedf9ac2ecd243721eada223f1b1790f75b
1 byte - number of bytes of second item (66)
42
66 bytes - pair of public keys
033fad80bd2b818d1ca8a8d4a25dafcf5e740be07db6788be1f2f15266e3c6805d0253ff3f140ef8f594d54996eab810a82550c79204279920d95681afe699d00da5
... 37 similar omitted pairs of public keys ...
1 byte - number of bytes of last item (66)
42
66 bytes - pair of public keys
032d9af13c8d5f5316fd27a14bafb8ec55684ef2e3b5c64b2645e088f570e5d2cb0239590f39508465decfd8a1bdc61b42333297e80588ed826ddd43678edfa6caae
proposed dynafed params entry
1 byte - dynafed param entry type (0 = null)
00
signblock witness
1 byte - number of items in vector (13)
0d
1 byte - number of bytes of first stack item (0)
00
1 byte - number of bytes of second stack item (71)
47
71 bytes - stack item
304402202b9ed0d3878eaab003014f788a9c64d9aae29ee34a77504be1c63f8362b69ed902200c2c8f4ea161b039c42122bfe4aacaa58ddecf7b135443ee90ba43b29621b0e701
... 4 similar omitted 71 byte stack items ...
1 byte - number of bytes of seventh stack item (72)
48
72 bytes - stack item
30450221008a4b2e6e19bf35c2fcd4d7a8aac71112c5167cab14c88d747c955106eed925460220087ef8246a3e7b3734bac9be4ec451f21fb075c3900844882c927b0434f5858f01
1 byte - number of bytes of eighth stack item (71)
47
71 bytes - stack item
30440220155bc86cd3881f3bcf1bdf9faf01f573ccd7f33e122ac60f65ddbcfa85530ff102207d1bbfb556215d1f1fb77f6ae5167755d549a7d3729ad25dcba45710a425876c01
1 byte - number of bytes of ninth stack item (72)
48
72 bytes - stack item
3045022100f22bd0d11599e644fd7f3dc2000b3b062c54289e6320de6db4b1498671f8f5f302203b8516986f326816addfea33e33cf60c17317ac3115d83e560063e9d51fbbdb501
1 byte - number of bytes of tenth stack item (72)
48
72 bytes - stack item
3045022100be32f27c8733c2cbc36a5b1be7f97dafd8b9d45a7e3aaef4b75c71f7f616f5b4022037f98b6970109646157db5e2cf8e0f6c40468ff846c4fe572aa43b6ef709acfe01
1 byte - number of bytes of eleventh stack item (72)
48
72 bytes - stack item
3045022100e795a36af35bf410e751e3ee003962382567985c9dc7bffaeb6b0ffc84f5ec0402204d90913c6a275ddf1ceae40462fdca00481951d903937d749a67a693c2d62c3101
1 byte - number of bytes of twelfth stack item (71)
47
71 bytes - stack item
3044022057900b7701dcc3f5bf5a21b221124abfd4dabb8555428fb20714e6512a9f562a022009f6bd4eb984c10a8a13a238271f43a7bafa7de102cd413820ab18ca603c6cf301
1 byte - compactsize identifier (253)
fd
2 bytes - number of bytes of thirteenth item (513)
0102
513 bytes - stack item
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
| Block Height | Block Hash | Link to header hex |
|---|---|---|
2197439 |
e889f779cd06228fc423b115fc913cbdaf213296b2a465f6869c98bc8d7fbe54 |
blockstream.info |
4 bytes - version (0x20000000 | 0x80000000)
000000a0
32 bytes - previous block hash
585732427571f441f406fc65376fb36fdf244c233e4d1e05717acbaed419b72f
32 bytes - merkle root
9612b230cbb31c872d317c0862bc83dbbeae0b48265138c08803a4d946583c3f
4 bytes - timestamp (1674644468)
f40bd163
4 bytes - block height (2197439)
bf872100
current dynafed params
1 byte - entry type (1 = compact)
01
signblock script
1 byte - length (34)
22
34 bytes - script
002080d146b4003a2f942bfc9a288c364cb3b7b0d72278d55f7fab93e1cad15331e6
4 bytes - signblock witness limit (1325)
2d050000
32 bytes - elided root
5615a639dc8fcb963288539533fb031fc8e174680a6c78c2d11f134f38fa47cf
proposed dynafed parameters
1 byte - entry type (2 = full)
02
signblock script
1 byte - length (34)
22
34 bytes - script
002080d146b4003a2f942bfc9a288c364cb3b7b0d72278d55f7fab93e1cad15331e6
4 bytes - signblock witness limit (1325)
2d050000
fedpeg program
1 byte - length (34)
22
34 bytes - script
0020333a4af67452308b9814ff59dc2fc3d0325fd7fdcb61d108e992b3956095f2fe
fedpeg script
1 byte - compactsize identifier (253 = 2 byte length)
fd
2 bytes - length (626)
7202
626 bytes - script
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
extension space
1 byte - number of items in vector (50)
32
1 byte - length
42
66 bytes - pair of public keys
02555f97c44ad9286ef060a02b00e8e6be2626ed3eb9230705d3ca2f977daae61e03cddbc847f64f898b883d717a7f637bedf9ac2ecd243721eada223f1b1790f75b
... 48 similar omitted pairs of public keys ...
1 byte - length
42
66 bytes - pair of public keys
02a04cad1256813f6a27259259911d25889c76aa783f7e89ab07e78b8f2288682e022709b399de547dc3850617092f2e47b0b6bf470a335f763c157c9ef11f7a2666
signblock witness
1 byte - number of items
0d
1 byte - length (0)
00
1 byte - length (72)
48
72 bytes - item
3045022100fd4ef1df91d8d452ef7a3ee2e857e25ed803d0c2ce29bfff56dd95d83ddb434b02206b797496a478fd564857fcc96e52cf92229fb86d95b1dcad87ba73409444f03501
1 byte - length (71)
47
71 bytes - item
3044022063ed103733c0615b573f063fc4d628aeac157f65d811d52654761b27e26a659a02205c4be52459c4f93a56c16efcdf16c12d4335e5f9f6d67aa727cdf0975bb6019301
1 byte - length (72)
48
72 bytes - item
3045022100f27d41105bc2d45a7b97e4687bcb0fc8f69ed86afddb04c85fbfc56db5680ae80220475a210835262b6e1c19d52a253f30fabf8180514c082e932bb536a9c0fda5c101
1 byte - length (72)
48
72 bytes - item
3045022100ac357a196dbfc868217e4a8e616e7d4a0130c09bd4fd6daa1bc1cc420d861d960220206e0d6dbe178fef544dd207d9a4bb97144a829b7ddd99d9e77588183332c4af01
1 byte - length (72)
48
72 bytes - item
3045022100d697104663cf618f6de31b58c3e1eaea60a81c3255c94b7e36743a564e7aac3d02207f7242fa81cda63a40ab4caa8a304cfb6ca70fd73929a853c39a3eb2b13bd40501
1 byte - length (72)
48
72 bytes - item
3045022100ade1bd5f077a510aad2a62fa0237a5f65f7146ae82e86a51a7aefff55932726a02203cb2bc6259cb9d42ef1d988732167c0569beff5f74504af17debeadab168c51401
1 byte - length (71)
47
71 bytes - item
304402205ffc0ea2db0d9b742ee60d53645c906bd2b44f32940228ca83e12fb7e4c820fa022029b21d81c0d8bce69d08ec89c6ef5eb3af13cbc3e823a475cece2de74d06fa4201
1 byte - length (72)
48
72 bytes - item
30450221009fa0b93828342be5e066b5bcfc57cfd4042206d09c57de24ece2243a88f2ec3702207671c838210b7135809d3d39f7481a394673662c1e0d8abcd0d8c6978f66aad801
1 byte - length (71)
47
71 bytes - item
304402201bd62398f9ad2c9edf422c6e91177290dcb24b7a6fb1980954b3febd6e1e7a02022015848f2f50797ab940422f62dc8b2db1d4f529a5c86e02104c0767290040242601
1 byte - length (72)
48
72 bytes - item
3045022100ac923a1ba600787f5c1a97bffb0c66c6bb73df29b14f223518abc460511c6e8f022050572cc69e12090708581d5db17a706bc0de4e5d158830ea11e639c450b9725301
1 byte - length (72)
48
72 bytes - item
3045022100ee51ef890fcc7728f0f27d2c5836929376da7b0fe0b23574248fdc9ccb92ec54022059d82e6dd431ac96e23985dba1dc4a79aedf113182096aecd4020ec65b35bd7d01
1 byte - compactsize identifier (253 = 2 byte length)
fd
2 bytes - length (513)
0102
513 bytes - item
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
| Block Height | Block Hash | Link to header hex |
|---|---|---|
2197441 |
b057a10a549fd95f1c8c30bccd3b564232d649b3ed8327c59f6ac523d0b586ad |
blockstream.info |
4 bytes - version (0x20000000 | 0x80000000)
000000a0
32 bytes - previous block hash
1c26ca99b0f2f531136eb9703efe4df80dd052d875c4d68dca48dc75d3b7aea0
32 bytes - Merkle root
1afe52dce37088b9d10080e968ef68f1598148ba3484572a84e8f92a1139cb8f
4 bytes - timestamp (1674644588)
6c0cd163
4 bytes - block height (2197441)
c1872100
current dynafed params entry
1 byte - dynafed param entry type (1 = compact)
01
signblock script
1 byte - length (34)
22
34 bytes - script
002080d146b4003a2f942bfc9a288c364cb3b7b0d72278d55f7fab93e1cad15331e6
4 bytes - signblock witness limit (1325)
2d050000
32 bytes - elided root
5740aa3ef1f3172562ff038ba03129cc294e99f6c76874d5ebd82367bbee6005
proposed dynafed parameters
1 byte - entry type (0 = null)
00
signblock witness
1 byte - number of items (13)
0d
1 byte - length (0)
00
1 byte - length (72)
48
72 bytes - item
3045022100fc3720634d5db81fea94fb9d9b9040103da9b5a82511f6fd20c92c64f64751e102200de3ab0e8f5f92518ddbda8e89a7a029b1118c6585da891f4b7a32383e74e35001
1 byte - length (71)
47
71 bytes - item
30440220036bfbc1b6abcef82e98d8c5dc6f3184913cea20713e072a894e46aaed5eb8bc02201f72486f4678e91d80e18e217b91b04d1912f27e0a96e9df0e3e59b26377b8bb01
1 byte - length (72)
48
72 bytes - item
3045022100fbb4c6125ed882943def6606fc594c330cb37ab1ccafbc3beb215640fe38c56e02205cb0fc03f083d25585afc46929c0ec9e9a92e8204679d30b0113758db28d11af01
1 byte - length (71)
47
71 bytes - item
3044022046f6b03990ae67629412ad6d82baefb6723a0d2b788c1bdcb4f210d171c76de602206b62a5ec8a145cc75e7f551c5caed2389a0c39deeae78e4726a06377280f97cb01
1 byte - length (72)
48
72 bytes - item
3045022100a2039c740998e4e9104a6dbb4792ca8880c20d3496741e10ffce81d30cfa0b2f02205a51515eca4e56de75cccb15237a1b6661abb63e963aee15f75662478fe506fa01
1 byte - length (72)
48
72 bytes - item
3045022100afe2ff3e0cdfd550d3ee976eeaacc724b80de9052edbbd9c78f794d353c9506f02202458326c2412dd261f08dff6b330552cf9372fa3f053d473a49bae29d9f22eaa01
1 byte - length (71)
47
71 bytes - item
3044022047fa73a69371dc70f8ee689f9d51a94bab0b733d6b3fbc29e82d37cb004427b802201446d330bf611dc1404f4c5146f23bd2c77572c832debbef21c661ad9e815f7f01
1 byte - length (71)
47
71 bytes - item
304402201182dca00bff9eb7424b309189d02449a0cb492c0669a3f91a22e3d90be6b86d0220147b07c34601c59e067fbd9ce4e7c773c57d64c8c8b2764149be95320d7a767b01
1 byte - length (71)
47
71 bytes - item
304402203d8ef69431bd0b969b065909d80038386839ce95c8ad7960e9530aa42cdd80d502204b2b54d634e77b89f36bb752e7e5d4294a78c07b2982e3337726d51d94bef33901
1 byte - length (72)
48
72 bytes - item
3045022100adb7b7ecfcdb89a474d9dd4f4fa6a6e85549fb0cb6d2519849e1a547576fe6ca0220493d29f4480324723c0af327aa2e21d8bcde23e88f419469f3ebcb0ba1d9816701
1 byte - length (72)
48
72 bytes - item
3045022100e129c209bb7703c36319c8a03dd2a81a1a3ef9408f5d57cc608942d2d71ee4d7022057913ee7325ca69682bb0439406217501fe4b78acbc748e58bbd24b467e35bf901
1 byte - compactsize identifier (253 = 2 byte length)
fd
2 bytes - length (513)
0102
513 bytes - item
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