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Example code of crystaldaking/finance-core

Informations about the package finance-core

Crystal Finance Core

crystaldaking/finance-core is a framework-agnostic PHP 8.5 financial core for applications that need safe money arithmetic, network-aware assets, double-entry ledgering, explainable fees, audit context, domain events, and idempotency primitives.

It can be used in PSPs, crypto acquiring systems, internal finance platforms, corporate accounting tools, reconciliation workers, CLI jobs, and plain PHP services. It is not a Laravel package, PSP application, database schema, report engine, tax engine, or UI.

Payment workflows, provider integrations, webhooks, refunds, chargebacks, payouts, and settlement flows belong in a future package such as crystaldaking/payments-core.

Installation

Core Principles

Money

$usdtTron and $usdtEthereum cannot be added together because they are different assets.

Fees

Ledger

Idempotency

Concrete Redis, SQL, cache, and lock implementations live outside this package.

Quality

The QA suite validates Composer metadata, coding style, PHPStan max level, Psalm strict analysis, PHPUnit unit tests, and architecture boundaries. The hardening suite adds line coverage and mutation testing:

Examples

The examples/ directory contains executable real-life usage scenarios:

examples/06-platform-fee-ledger-posting.php is the integration proof: it combines money, fees, ledger posting, audit context, a domain event, and an idempotency fingerprint in one merchant finance scenario.

See examples/README.md for the full runnable scenario list.

Release Governance

All versions of finance-core with dependencies

PHP Build Version
Package Version
Requires php Version ^8.5
brick/math Version ^0.17
psr/clock Version ^1.0
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