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/**
* Web Ledger module tests
* Verifies spec compliance with https://webledgers.org/
*/
import { describe, it } from 'node:test';
import assert from 'node:assert';
import {
createLedger,
getBalance,
setBalance,
credit,
debit,
listBalances,
compact
} from '../src/webledger.js';
const CONTEXT = 'https://w3id.org/webledgers';
describe('Web Ledger', () => {
describe('createLedger', () => {
it('should create spec-compliant ledger with required fields', () => {
const ledger = createLedger();
assert.strictEqual(ledger['@context'], CONTEXT);
assert.strictEqual(ledger.type, 'WebLedger');
assert.strictEqual(ledger.defaultCurrency, 'satoshi');
assert.ok(Array.isArray(ledger.entries));
assert.strictEqual(ledger.entries.length, 0);
assert.ok(typeof ledger.created === 'number');
assert.ok(typeof ledger.updated === 'number');
});
it('should accept custom options', () => {
const ledger = createLedger({
name: 'Alice Credits',
description: 'Pod credits for alice.pod',
id: 'https://alice.example/.well-known/webledgers/webledgers.json',
defaultCurrency: 'USD'
});
assert.strictEqual(ledger.name, 'Alice Credits');
assert.strictEqual(ledger.description, 'Pod credits for alice.pod');
assert.strictEqual(ledger.id, 'https://alice.example/.well-known/webledgers/webledgers.json');
assert.strictEqual(ledger.defaultCurrency, 'USD');
});
});
describe('getBalance / setBalance', () => {
it('should return 0 for unknown URI', () => {
const ledger = createLedger();
assert.strictEqual(getBalance(ledger, 'did:nostr:abc123'), 0);
});
it('should set and get balance', () => {
const ledger = createLedger();
setBalance(ledger, 'did:nostr:abc123', 5000);
assert.strictEqual(getBalance(ledger, 'did:nostr:abc123'), 5000);
});
it('should create spec-compliant Entry', () => {
const ledger = createLedger();
setBalance(ledger, 'did:nostr:abc123', 100);
const entry = ledger.entries[0];
assert.strictEqual(entry.type, 'Entry');
assert.strictEqual(entry.url, 'did:nostr:abc123');
assert.strictEqual(entry.amount, '100');
});
it('should update existing entry', () => {
const ledger = createLedger();
setBalance(ledger, 'did:nostr:abc123', 100);
setBalance(ledger, 'did:nostr:abc123', 200);
assert.strictEqual(ledger.entries.length, 1);
assert.strictEqual(getBalance(ledger, 'did:nostr:abc123'), 200);
});
it('should handle array amount format', () => {
const ledger = createLedger();
ledger.entries.push({
type: 'Entry',
url: 'did:nostr:multi',
amount: [
{ currency: 'satoshi', value: '50000' },
{ currency: 'USD', value: '25.00' }
]
});
assert.strictEqual(getBalance(ledger, 'did:nostr:multi'), 50000);
});
});
describe('credit / debit', () => {
it('should credit a new URI', () => {
const ledger = createLedger();
const bal = credit(ledger, 'did:nostr:user1', 1000);
assert.strictEqual(bal, 1000);
assert.strictEqual(getBalance(ledger, 'did:nostr:user1'), 1000);
});
it('should accumulate credits', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 1000);
const bal = credit(ledger, 'did:nostr:user1', 500);
assert.strictEqual(bal, 1500);
});
it('should debit when sufficient balance', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 1000);
const result = debit(ledger, 'did:nostr:user1', 300);
assert.strictEqual(result.success, true);
assert.strictEqual(result.balance, 700);
});
it('should fail debit when insufficient balance', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 100);
const result = debit(ledger, 'did:nostr:user1', 200);
assert.strictEqual(result.success, false);
assert.strictEqual(result.balance, 100);
// Balance unchanged
assert.strictEqual(getBalance(ledger, 'did:nostr:user1'), 100);
});
it('should fail debit on zero balance', () => {
const ledger = createLedger();
const result = debit(ledger, 'did:nostr:nobody', 1);
assert.strictEqual(result.success, false);
assert.strictEqual(result.balance, 0);
});
});
describe('listBalances / compact', () => {
it('should list non-zero balances', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:a', 100);
credit(ledger, 'did:nostr:b', 0);
credit(ledger, 'did:nostr:c', 50);
const list = listBalances(ledger);
assert.strictEqual(list.length, 2);
assert.ok(list.find(e => e.url === 'did:nostr:a' && e.amount === 100));
assert.ok(list.find(e => e.url === 'did:nostr:c' && e.amount === 50));
});
it('should compact zero-balance entries', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:a', 100);
credit(ledger, 'did:nostr:b', 50);
debit(ledger, 'did:nostr:b', 50);
assert.strictEqual(ledger.entries.length, 2);
compact(ledger);
assert.strictEqual(ledger.entries.length, 1);
assert.strictEqual(ledger.entries[0].url, 'did:nostr:a');
});
});
describe('multi-currency', () => {
it('should credit and debit with specific currency', () => {
const ledger = createLedger();
const bal = credit(ledger, 'did:nostr:user1', 1000, 'tbtc3');
assert.strictEqual(bal, 1000);
assert.strictEqual(getBalance(ledger, 'did:nostr:user1', 'tbtc3'), 1000);
// Default balance should be 0 (no satoshi credits)
assert.strictEqual(getBalance(ledger, 'did:nostr:user1'), 0);
});
it('should track multiple currencies independently', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 1000, 'tbtc3');
credit(ledger, 'did:nostr:user1', 5000, 'tbtc4');
assert.strictEqual(getBalance(ledger, 'did:nostr:user1', 'tbtc3'), 1000);
assert.strictEqual(getBalance(ledger, 'did:nostr:user1', 'tbtc4'), 5000);
});
it('should debit specific currency', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 1000, 'tbtc3');
credit(ledger, 'did:nostr:user1', 5000, 'tbtc4');
const result = debit(ledger, 'did:nostr:user1', 300, 'tbtc3');
assert.strictEqual(result.success, true);
assert.strictEqual(result.balance, 700);
// tbtc4 unchanged
assert.strictEqual(getBalance(ledger, 'did:nostr:user1', 'tbtc4'), 5000);
});
it('should fail debit when currency balance insufficient', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 100, 'tbtc3');
const result = debit(ledger, 'did:nostr:user1', 200, 'tbtc3');
assert.strictEqual(result.success, false);
assert.strictEqual(result.balance, 100);
});
it('should migrate simple string to array on currency credit', () => {
const ledger = createLedger();
// First set a simple balance
setBalance(ledger, 'did:nostr:user1', 500);
assert.strictEqual(getBalance(ledger, 'did:nostr:user1'), 500);
// Now add a currency-specific balance — should migrate to array
credit(ledger, 'did:nostr:user1', 1000, 'tbtc3');
assert.strictEqual(getBalance(ledger, 'did:nostr:user1', 'tbtc3'), 1000);
// Old satoshi balance should be preserved in array
const entry = ledger.entries.find(e => e.url === 'did:nostr:user1');
assert.ok(Array.isArray(entry.amount));
const satEntry = entry.amount.find(a => a.currency === 'satoshi');
assert.strictEqual(parseInt(satEntry.value), 500);
});
it('should use array format in entries', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:user1', 1000, 'tbtc3');
const entry = ledger.entries.find(e => e.url === 'did:nostr:user1');
assert.ok(Array.isArray(entry.amount));
assert.strictEqual(entry.amount[0].currency, 'tbtc3');
assert.strictEqual(entry.amount[0].value, '1000');
});
});
describe('URI format support', () => {
it('should work with did:nostr URIs', () => {
const ledger = createLedger();
credit(ledger, 'did:nostr:de7ecd1e2976a6adb2ffa5f4db81a7d812c8bb6698aa00dcf1e76adb55efd645', 100);
assert.strictEqual(getBalance(ledger, 'did:nostr:de7ecd1e2976a6adb2ffa5f4db81a7d812c8bb6698aa00dcf1e76adb55efd645'), 100);
});
it('should work with WebID URIs', () => {
const ledger = createLedger();
credit(ledger, 'https://alice.example/profile/card#me', 500);
assert.strictEqual(getBalance(ledger, 'https://alice.example/profile/card#me'), 500);
});
it('should work with mailto URIs', () => {
const ledger = createLedger();
credit(ledger, 'mailto:alice@example.com', 200);
assert.strictEqual(getBalance(ledger, 'mailto:alice@example.com'), 200);
});
});
});