Struct ergotree_ir::ergo_tree::ErgoTreeHeader
source · pub struct ErgoTreeHeader { /* private fields */ }Expand description
Currently we define meaning for only first byte, which may be extended in future versions. 7 6 5 4 3 2 1 0
| | | | | | | | |
Bit 7 == 1 if the header contains more than 1 byte (default == 0) Bit 6 - reserved for GZIP compression (should be 0) Bit 5 == 1 - reserved for context dependent costing (should be = 0) Bit 4 == 1 if constant segregation is used for this ErgoTree (default = 0) (see https://github.com/ScorexFoundation/sigmastate-interpreter/issues/264) Bit 3 == 1 if size of the whole tree is serialized after the header byte (default = 0) Bits 2-0 - language version (current version == 0)
Currently we don’t specify interpretation for the second and other bytes of the header. We reserve the possibility to extend header by using Bit 7 == 1 and chain additional bytes as in VLQ. Once the new bytes are required, a new version of the language should be created and implemented. That new language will give an interpretation for the new bytes.
Implementations§
source§impl ErgoTreeHeader
impl ErgoTreeHeader
sourcepub fn sigma_serialize<W: SigmaByteWrite>(&self, w: &mut W) -> Result<(), Error>
pub fn sigma_serialize<W: SigmaByteWrite>(&self, w: &mut W) -> Result<(), Error>
Serialization
sourcepub fn sigma_parse<R: SigmaByteRead>(
r: &mut R
) -> Result<Self, ErgoTreeHeaderError>
pub fn sigma_parse<R: SigmaByteRead>( r: &mut R ) -> Result<Self, ErgoTreeHeaderError>
Deserialization
source§impl ErgoTreeHeader
impl ErgoTreeHeader
sourcepub fn new(header_byte: u8) -> Result<Self, ErgoTreeHeaderError>
pub fn new(header_byte: u8) -> Result<Self, ErgoTreeHeaderError>
Parse from byte
sourcepub fn serialized(&self) -> u8
pub fn serialized(&self) -> u8
Serialize to byte
sourcepub fn v0(constant_segregation: bool) -> Self
pub fn v0(constant_segregation: bool) -> Self
Return a header with version set to 0 and constant segregation flag set to the given value
sourcepub fn v1(constant_segregation: bool) -> Self
pub fn v1(constant_segregation: bool) -> Self
Return a header with version set to 1 (with size flag set) and constant segregation flag set to the given value
sourcepub fn is_constant_segregation(&self) -> bool
pub fn is_constant_segregation(&self) -> bool
Returns true if constant segregation flag is set
sourcepub fn version(&self) -> &ErgoTreeVersion
pub fn version(&self) -> &ErgoTreeVersion
Returns ErgoTree version
Trait Implementations§
source§impl Clone for ErgoTreeHeader
impl Clone for ErgoTreeHeader
source§fn clone(&self) -> ErgoTreeHeader
fn clone(&self) -> ErgoTreeHeader
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moresource§impl Debug for ErgoTreeHeader
impl Debug for ErgoTreeHeader
source§impl PartialEq for ErgoTreeHeader
impl PartialEq for ErgoTreeHeader
source§fn eq(&self, other: &ErgoTreeHeader) -> bool
fn eq(&self, other: &ErgoTreeHeader) -> bool
This method tests for
self and other values to be equal, and is used
by ==.impl Eq for ErgoTreeHeader
impl StructuralEq for ErgoTreeHeader
impl StructuralPartialEq for ErgoTreeHeader
Auto Trait Implementations§
impl RefUnwindSafe for ErgoTreeHeader
impl Send for ErgoTreeHeader
impl Sync for ErgoTreeHeader
impl Unpin for ErgoTreeHeader
impl UnwindSafe for ErgoTreeHeader
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