@zkmpa/group
Version:
Group management for zkMPA (Zero-Knowledge Multi-Party Approval)
70 lines • 2.37 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.GroupImpl = void 0;
const group_1 = require("@semaphore-protocol/group");
class GroupImpl {
constructor(config) {
this.id = config.id;
this.config = config;
this.semaphoreGroup = new group_1.Group();
this.memberSet = new Set();
}
addMember(commitment) {
const commitmentStr = commitment.toString();
if (this.memberSet.has(commitmentStr)) {
throw new Error(`Member ${commitmentStr} already exists in group ${this.id}`);
}
this.semaphoreGroup.addMember(commitment);
this.memberSet.add(commitmentStr);
}
removeMember(commitment) {
const index = this.indexOf(commitment);
if (index === -1) {
throw new Error(`Member ${commitment} not found in group ${this.id}`);
}
this.semaphoreGroup.removeMember(index);
this.memberSet.delete(commitment.toString());
}
getMerkleRoot() {
return this.semaphoreGroup.root;
}
getMerkleProof(commitment) {
const index = this.indexOf(commitment);
if (index === -1) {
throw new Error(`Member ${commitment} not found in group ${this.id}`);
}
const proof = this.semaphoreGroup.generateMerkleProof(index);
// Create path indices from index
const pathIndices = [];
let currentIndex = index;
for (let i = 0; i < proof.siblings.length; i++) {
pathIndices.push(currentIndex % 2);
currentIndex = Math.floor(currentIndex / 2);
}
return {
siblings: proof.siblings.map((s) => s.toString()),
pathIndices
};
}
getMembers() {
return this.semaphoreGroup.members;
}
indexOf(commitment) {
return this.semaphoreGroup.indexOf(commitment);
}
exportState() {
return {
id: this.id,
config: this.config,
merkleRoot: this.getMerkleRoot().toString(),
merkleTreeDepth: this.semaphoreGroup.depth,
members: this.getMembers().map(m => m.toString()),
memberCount: this.getMembers().length
};
}
getSemaphoreGroup() {
return this.semaphoreGroup;
}
}
exports.GroupImpl = GroupImpl;
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