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use crate::{
commons::{
crypto::KeyPair,
errors::SubjectError,
identifier::{DigestIdentifier, KeyIdentifier},
},
signature::Signed,
Derivable, Event, DigestDerivator,
};
use borsh::{BorshDeserialize, BorshSerialize};
use json_patch::{patch, Patch};
use serde::{Deserialize, Serialize};
use super::{evaluation::SubjectContext, request::EventRequest, value_wrapper::ValueWrapper};
/// A struct representing a TAPLE subject.
#[derive(Debug, Deserialize, Serialize, Clone, BorshSerialize, BorshDeserialize)]
pub struct Subject {
/// The key pair associated with the subject, if any.
pub keys: Option<KeyPair>,
/// The identifier of the subject.
pub subject_id: DigestIdentifier,
/// The identifier of the governance contract associated with the subject.
pub governance_id: DigestIdentifier,
/// The current sequence number of the subject.
pub sn: u64,
/// The version of the governance contract that created the subject.
pub genesis_gov_version: u64,
/// The identifier of the public key of the subject owner.
pub public_key: KeyIdentifier,
/// The namespace of the subject.
pub namespace: String,
/// The name of the subject.
pub name: String,
/// The identifier of the schema used to validate the subject.
pub schema_id: String,
/// The identifier of the public key of the subject owner.
pub owner: KeyIdentifier,
/// The identifier of the public key of the subject creator.
pub creator: KeyIdentifier,
/// The current status of the subject.
pub properties: ValueWrapper,
/// Indicates whether the subject is active or not.
pub active: bool,
}
/// A struct representing the data associated with a TAPLE subject.
#[derive(Debug, Deserialize, Serialize, Clone)]
pub struct SubjectData {
/// The identifier of the subject.
pub subject_id: DigestIdentifier,
/// The identifier of the governance contract associated with the subject.
pub governance_id: DigestIdentifier,
/// The current sequence number of the subject.
pub sn: u64,
/// The identifier of the public key of the subject owner.
pub public_key: KeyIdentifier,
/// The namespace of the subject.
pub namespace: String,
/// The name of the subject.
pub name: String,
/// The identifier of the schema used to validate the subject.
pub schema_id: String,
/// The identifier of the public key of the subject owner.
pub owner: KeyIdentifier,
/// The identifier of the public key of the subject creator.
pub creator: KeyIdentifier,
/// The current status of the subject.
pub properties: ValueWrapper,
/// Indicates whether the subject is active or not.
pub active: bool,
}
impl From<Subject> for SubjectData {
fn from(subject: Subject) -> Self {
Self {
subject_id: subject.subject_id,
governance_id: subject.governance_id,
sn: subject.sn,
public_key: subject.public_key,
namespace: subject.namespace,
schema_id: subject.schema_id,
owner: subject.owner,
creator: subject.creator,
properties: subject.properties,
active: subject.active,
name: subject.name,
}
}
}
impl Subject {
// // TODO: Probablemente borrar
// pub fn from_genesis_request(
// event_request: EventRequest,
// init_state: String,
// ) -> Result<Self, SubjectError> {
// let EventRequestType::Create(create_request) = event_request.request.clone() else {
// return Err(SubjectError::NotCreateEvent)
// };
// // TODO: Pasar que tipo de esquema criptográfico se quiere usar por parametros
// let keys = KeyPair::Ed25519(Ed25519KeyPair::new());
// let public_key = KeyIdentifier::new(keys.get_key_derivator(), &keys.public_key_bytes());
// let subject_id = generate_subject_id(
// &create_request.namespace,
// &create_request.schema_id,
// create_request.public_key.to_str(),
// create_request.governance_id.to_str(),
// 0, // Ta mal
// )?;
// Ok(Subject {
// keys: Some(keys),
// subject_id,
// governance_id: create_request.governance_id.clone(),
// sn: 0,
// public_key,
// namespace: create_request.namespace.clone(),
// schema_id: create_request.schema_id.clone(),
// owner: event_request.signature.content.signer.clone(),
// creator: event_request.signature.content.signer.clone(),
// properties: init_state,
// active: true,
// name: create_request.name,
// })
// }
pub fn get_subject_context(&self, invoker: KeyIdentifier) -> SubjectContext {
SubjectContext {
governance_id: self.governance_id.clone(),
schema_id: self.schema_id.clone(),
is_owner: invoker == self.owner,
state: self.properties.clone(),
namespace: self.namespace.clone(),
}
}
pub fn from_genesis_event(
event: Signed<Event>,
init_state: ValueWrapper,
keys: Option<KeyPair>,
derivator: DigestDerivator
) -> Result<Self, SubjectError> {
let EventRequest::Create(create_request) = event.content.event_request.content.clone() else {
return Err(SubjectError::NotCreateEvent)
};
let subject_id = generate_subject_id(
&create_request.namespace,
&create_request.schema_id,
create_request.public_key.to_str(),
create_request.governance_id.to_str(),
event.content.gov_version,
derivator
)?;
Ok(Subject {
keys,
subject_id,
governance_id: create_request.governance_id.clone(),
sn: 0,
public_key: create_request.public_key,
namespace: create_request.namespace.clone(),
schema_id: create_request.schema_id.clone(),
owner: event.content.event_request.signature.signer.clone(),
creator: event.content.event_request.signature.signer.clone(),
properties: init_state,
active: true,
name: create_request.name,
genesis_gov_version: event.content.gov_version,
})
}
pub fn update_subject(
&mut self,
json_patch: ValueWrapper,
new_sn: u64,
) -> Result<(), SubjectError> {
let Ok(patch_json) = serde_json::from_value::<Patch>(json_patch.0) else {
return Err(SubjectError::ErrorParsingJsonString("Json Patch conversion fails".to_owned()));
};
let Ok(()) = patch(&mut self.properties.0, &patch_json) else {
return Err(SubjectError::ErrorApplyingPatch("Error Applying Patch".to_owned()));
};
self.sn = new_sn;
Ok(())
}
pub fn transfer_subject(
&mut self,
owner: KeyIdentifier,
public_key: KeyIdentifier,
keys: Option<KeyPair>,
sn: u64,
) {
self.owner = owner;
self.public_key = public_key;
self.keys = keys;
self.sn = sn;
}
pub fn get_state_hash(&self, derivator: DigestDerivator) -> Result<DigestIdentifier, SubjectError> {
Ok(
DigestIdentifier::from_serializable_borsh(&self.properties, derivator).map_err(|_| {
SubjectError::CryptoError(String::from("Error calculating the hash of the state"))
})?,
)
}
pub fn eol_event(&mut self) {
self.active = false;
}
pub fn state_hash_after_apply(
&self,
json_patch: ValueWrapper,
derivator: DigestDerivator
) -> Result<DigestIdentifier, SubjectError> {
let mut subject_properties = self.properties.clone();
let json_patch = serde_json::from_value::<Patch>(json_patch.0)
.map_err(|_| SubjectError::CryptoError(String::from("Error parsing the json patch")))?;
patch(&mut subject_properties.0, &json_patch).map_err(|_| {
SubjectError::CryptoError(String::from("Error applying the json patch"))
})?;
Ok(
DigestIdentifier::from_serializable_borsh(&subject_properties, derivator).map_err(|_| {
SubjectError::CryptoError(String::from("Error calculating the hash of the state"))
})?,
)
}
}
pub fn generate_subject_id(
namespace: &str,
schema_id: &str,
public_key: String,
governance_id: String,
governance_version: u64,
derivator: DigestDerivator
) -> Result<DigestIdentifier, SubjectError> {
let subject_id = DigestIdentifier::from_serializable_borsh((
namespace,
schema_id,
public_key,
governance_id,
governance_version,
), derivator)
.map_err(|_| SubjectError::ErrorCreatingSubjectId)?;
Ok(subject_id)
}