diff --git a/contracts/stellar-id/src/lib.rs b/contracts/stellar-id/src/lib.rs index bd6b87b..412d7b6 100644 --- a/contracts/stellar-id/src/lib.rs +++ b/contracts/stellar-id/src/lib.rs @@ -573,15 +573,30 @@ impl StellarIdContract { .persistent() .set(&DataKey::Identity(subject.clone()), &identity); - let mut issuer_rec: Issuer = env + if let Some(mut issuer_rec) = env .storage() .persistent() - .get(&DataKey::Issuer(issuer.clone())) - .expect("Issuer not found"); - issuer_rec.credential_count += 1; - env.storage() - .persistent() - .set(&DataKey::Issuer(issuer.clone()), &issuer_rec); + .get::(&DataKey::Issuer(issuer.clone())) + { + issuer_rec.credential_count += 1; + env.storage() + .persistent() + .set(&DataKey::Issuer(issuer.clone()), &issuer_rec); + } else { + let chain = Self::resolve_delegation_chain(env.clone(), issuer.clone()); + if let Some(root_addr) = chain.get(chain.len() - 1) { + if let Some(mut root_rec) = env + .storage() + .persistent() + .get::(&DataKey::Issuer(root_addr.clone())) + { + root_rec.credential_count += 1; + env.storage() + .persistent() + .set(&DataKey::Issuer(root_addr), &root_rec); + } + } + } env.events().publish( (Symbol::new(&env, "credential_issued"),), @@ -694,15 +709,30 @@ impl StellarIdContract { .instance() .set(&DataKey::CredentialCount, &count); - let mut issuer_rec: Issuer = env + if let Some(mut issuer_rec) = env .storage() .persistent() - .get(&DataKey::Issuer(issuer.clone())) - .expect("Issuer not found"); - issuer_rec.credential_count += subjects.len() as u64; - env.storage() - .persistent() - .set(&DataKey::Issuer(issuer.clone()), &issuer_rec); + .get::(&DataKey::Issuer(issuer.clone())) + { + issuer_rec.credential_count += subjects.len() as u64; + env.storage() + .persistent() + .set(&DataKey::Issuer(issuer.clone()), &issuer_rec); + } else { + let chain = Self::resolve_delegation_chain(env.clone(), issuer.clone()); + if let Some(root_addr) = chain.get(chain.len() - 1) { + if let Some(mut root_rec) = env + .storage() + .persistent() + .get::(&DataKey::Issuer(root_addr.clone())) + { + root_rec.credential_count += subjects.len() as u64; + env.storage() + .persistent() + .set(&DataKey::Issuer(root_addr), &root_rec); + } + } + } env.events().publish( (Symbol::new(&env, "credentials_batch_issued"),), @@ -1466,7 +1496,9 @@ impl StellarIdContract { assert!(record.active, "Issuer is not active"); record.trust_level } else { - panic!("Not a registered issuer"); + let delegated_trust = Self::compute_delegated_trust(env.clone(), issuer.clone()); + assert!(delegated_trust > 0, "Not a registered issuer or active delegate"); + delegated_trust } } diff --git a/contracts/stellar-id/test_snapshots/tests/test_delegation_chain_trust_decay_and_revocation.1.json b/contracts/stellar-id/test_snapshots/tests/test_delegation_chain_trust_decay_and_revocation.1.json new file mode 100644 index 0000000..88ff3d0 --- /dev/null +++ b/contracts/stellar-id/test_snapshots/tests/test_delegation_chain_trust_decay_and_revocation.1.json @@ -0,0 +1,2299 @@ +{ + "generators": { + "address": 6, + "nonce": 0 + }, + "auth": [ + [ + [ + "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD2KM", + { + "function": { + "contract_fn": { + "contract_address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4", + "function_name": "initialize", + "args": [ + { + "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD2KM" + } + ] + } + }, + "sub_invocations": [] + } + ] + ], + [ + [ + "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD2KM", + { + "function": { + "contract_fn": { + "contract_address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4", + "function_name": "register_issuer", + "args": [ + { + "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD2KM" + }, + { + "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHK3M" + }, + { + "string": "Test Issuer" + }, + { + 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"v0": { + "topics": [ + { + "symbol": "fn_return" + }, + { + "symbol": "get_delegation_link" + } + ], + "data": { + "map": [ + { + "key": { + "symbol": "created_at" + }, + "val": { + "u64": 0 + } + }, + { + "key": { + "symbol": "delegate" + }, + "val": { + "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAK3IM" + } + }, + { + "key": { + "symbol": "max_depth" + }, + "val": { + "u32": 3 + } + }, + { + "key": { + "symbol": "parent" + }, + "val": { + "address": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAITA4" + } + }, + { + "key": { + "symbol": "revoked" + }, + "val": { + "bool": true + } + }, + { + "key": { + "symbol": "trust_fraction" + }, + "val": { + "u32": 8000 + } + } + ] + } + } + } + }, + "failed_call": false + } + ] +} \ No newline at end of file diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md index 25313ba..f00b743 100644 --- a/docs/ARCHITECTURE.md +++ b/docs/ARCHITECTURE.md @@ -74,7 +74,7 @@ Persistent storage entries have their own TTL and survive contract upgrades. Ins | `authorize_sub_issuer` | Parent issuer only | | `revoke_sub_issuer` | Parent issuer only | | `register_schema` | Active issuer only | -| `issue_credential` | Active registered issuer only | +| `issue_credential` | Active registered/delegated issuer only | | `revoke_credential` | Original issuer only | | `create_proposal` | Active registered issuer only | | `vote` | Active registered issuer only | @@ -86,21 +86,19 @@ Persistent storage entries have their own TTL and survive contract upgrades. Ins --- -| Event | Emitted When | -|---|---| -| `issuer_registered` | New issuer approved | -| `issuer_deactivated` | Issuer disabled | -| `sub_issuer_authorized` | Sub-issuer delegation granted | -| `sub_issuer_revoked` | Sub-issuer delegation removed | -| `schema_registered` | New schema created | -| `credential_issued` | Credential issued to subject | -| `credential_revoked` | Credential revoked | +## Transitive Credential Delegation Chain + +StellarID supports multi-hop hierarchical delegation chains with depth limits and trust decay. -## Reputation Score Formula +### Delegation Link +A `DelegationLink` defines `(parent, delegate, max_depth, trust_fraction)`. +### Trust Decay Calculation +Trust decays across delegate hops using fixed-point integer math: ``` -reputation = min(credential_count × 10 + (trust_level / 10), 1000) +delegated_trust = (root_trust × fraction_1 / 10000 × fraction_2 / 10000 × ... × fraction_k / 10000) ``` +where `trust_fraction` is expressed in basis points (max 10,000 = 100%). The score increases as more trusted issuers credential the subject. It caps at 1000 to prevent overflow. The score is re-computed on every new credential issuance.