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feat: Privacy-preserving identity aggregator with anonymous XOR accumulator set membership proofs (#65) #71

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Merged
michaelvic123 merged 4 commits into from
Jul 30, 2026
Merged

feat: Privacy-preserving identity aggregator with anonymous XOR accumulator set membership proofs (#65) #71

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eecd3e9
feat: Privacy-preserving identity aggregator with anonymous XOR accum…
jotel-dev Jul 29, 2026
45df49f
Merge branch 'main' into issue-65-privacy-preserving-identity-aggregator
michaelvic123 Jul 30, 2026
24aea53
Merge branch 'main' into issue-65-privacy-preserving-identity-aggregator
michaelvic123 Jul 30, 2026
8073e18
Merge branch 'main' into issue-65-privacy-preserving-identity-aggregator
michaelvic123 Jul 30, 2026
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11 changes: 10 additions & 1 deletion contracts/stellar-id/src/lib.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -133,7 +133,7 @@ pub enum DataKey {
BridgeOperator(Address),
// bridged attestation (chain_id, uid) -> bool
BridgedAttestation(u64, BytesN<32>),
// subject -> Vec<u64> of bridged credential IDs
// subject -> Vec<u64> of their bridged credential IDs
SubjectBridgeCredentials(Address),
// credential_id -> BridgeAttestation
BridgeMetadata(u64),
Expand Down Expand Up @@ -535,6 +535,8 @@ impl StellarIdContract {
credential_hash,
};

Self::update_schema_accumulator(&env, schema_id, &subject, true);

env.storage()
.persistent()
.set(&DataKey::Credential(credential_id), &credential);
Expand Down Expand Up @@ -666,6 +668,8 @@ impl StellarIdContract {
credential_hash,
};

Self::update_schema_accumulator(&env, schema_id, &subject, true);

env.storage()
.persistent()
.set(&DataKey::Credential(credential_id), &credential);
Expand Down Expand Up @@ -814,6 +818,8 @@ impl StellarIdContract {
credential_hash,
};

Self::update_schema_accumulator(&env, schema_id, &subject, true);

env.storage()
.persistent()
.set(&DataKey::Credential(credential_id), &credential);
Expand Down Expand Up @@ -915,6 +921,7 @@ impl StellarIdContract {
assert!(!credential.revoked, "Credential already revoked");

credential.revoked = true;
Self::update_schema_accumulator(&env, credential.schema_id, &credential.subject, false);
env.storage()
.persistent()
.set(&DataKey::Credential(credential_id), &credential);
Expand Down Expand Up @@ -1572,6 +1579,8 @@ impl StellarIdContract {
credential_hash,
};

Self::update_schema_accumulator(env, request.schema_id, &request.subject, true);

env.storage()
.persistent()
.set(&DataKey::Credential(credential_id), &credential);
Expand Down
90 changes: 90 additions & 0 deletions contracts/stellar-id/test_snapshots/tests/test_batch_issue_credentials.1.json
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Original file line number Diff line number Diff line change
Expand Up @@ -935,6 +935,96 @@
4095
]
],
[
{
"contract_data": {
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaAccumulator"
},
{
"u32": 1
}
]
},
"durability": "persistent"
}
},
[
{
"last_modified_ledger_seq": 0,
"data": {
"contract_data": {
"ext": "v0",
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaAccumulator"
},
{
"u32": 1
}
]
},
"durability": "persistent",
"val": {
"bytes": "e412e48727de9cc3096c68f0557b8c8492821fa4839cf6d3dda380f73cfe6e4c"
}
}
},
"ext": "v0"
},
4095
]
],
[
{
"contract_data": {
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaHolderCount"
},
{
"u32": 1
}
]
},
"durability": "persistent"
}
},
[
{
"last_modified_ledger_seq": 0,
"data": {
"contract_data": {
"ext": "v0",
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaHolderCount"
},
{
"u32": 1
}
]
},
"durability": "persistent",
"val": {
"u32": 3
}
}
},
"ext": "v0"
},
4095
]
],
[
{
"contract_data": {
Expand Down
180 changes: 180 additions & 0 deletions ...r-id/test_snapshots/tests/test_batch_issue_credentials_updates_multiple_identities.1.json
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -991,6 +991,186 @@
4095
]
],
[
{
"contract_data": {
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaAccumulator"
},
{
"u32": 1
}
]
},
"durability": "persistent"
}
},
[
{
"last_modified_ledger_seq": 0,
"data": {
"contract_data": {
"ext": "v0",
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaAccumulator"
},
{
"u32": 1
}
]
},
"durability": "persistent",
"val": {
"bytes": "5f8d30e655a7ba0d7596bb3ddfb1d2d20390d23b1845000e1e118b3be1b3f040"
}
}
},
"ext": "v0"
},
4095
]
],
[
{
"contract_data": {
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaAccumulator"
},
{
"u32": 2
}
]
},
"durability": "persistent"
}
},
[
{
"last_modified_ledger_seq": 0,
"data": {
"contract_data": {
"ext": "v0",
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaAccumulator"
},
{
"u32": 2
}
]
},
"durability": "persistent",
"val": {
"bytes": "a7db5ae6ee3bfcddbf45dbc6cd9e84075756cbfca00ee0383d3ea949be26c13c"
}
}
},
"ext": "v0"
},
4095
]
],
[
{
"contract_data": {
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaHolderCount"
},
{
"u32": 1
}
]
},
"durability": "persistent"
}
},
[
{
"last_modified_ledger_seq": 0,
"data": {
"contract_data": {
"ext": "v0",
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaHolderCount"
},
{
"u32": 1
}
]
},
"durability": "persistent",
"val": {
"u32": 1
}
}
},
"ext": "v0"
},
4095
]
],
[
{
"contract_data": {
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaHolderCount"
},
{
"u32": 2
}
]
},
"durability": "persistent"
}
},
[
{
"last_modified_ledger_seq": 0,
"data": {
"contract_data": {
"ext": "v0",
"contract": "CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4",
"key": {
"vec": [
{
"symbol": "SchemaHolderCount"
},
{
"u32": 2
}
]
},
"durability": "persistent",
"val": {
"u32": 2
}
}
},
"ext": "v0"
},
4095
]
],
[
{
"contract_data": {
Expand Down
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