POPPOP NFT Platform

Solo-built NFT trading/exchange platform on the Beatoz chain using batch-oriented smart contracts and a batch execution server.

Role: Solo builder · architecture, implementation, and operational tooling
Period: 2024.03 - 2025.08
Context: Beatoz Labs

01 / Executive summary

Solo-built NFT trading/exchange platform on the Beatoz chain using batch-oriented smart contracts and a batch execution server.

DECISION / ASystem challenge

What made the system difficult.

Required a reliable batch execution flow across multiple transaction types while keeping on-chain operations safe and observable.

DECISION / BEngineering response

How boundaries and flows answered it.

Implemented batch functions in Solidity (trade/cancel/refund/settlement/gift/barcode) and a gRPC-based batch server with queueing, retries, and operational safeguards.

02 / System path

The path of responsibility through the system.

TM-Contract-V2

Smart Contract Layer

Responsibilities

— Batch trade functions
— Fee tracking
— Rollback support

TM-BatchServer

Backend API Layer

Responsibilities

— gRPC batch endpoints
— Queue-based execution
— Retry & monitoring

03 / Technology field

01Solidity02Node.js03gRPC04Hardhat05OpenZeppelin06Bull07Redis

04 / Detailed record

Overview

Solo-built NFT trading/exchange platform on the Beatoz chain.
Designed around on-chain batch execution + an off-chain batch execution server.

Key Components

TM-Contract-V2 (Smart Contracts)

Transaction-type state transitions (purchase/exchange/refund/settlement/gift, etc.)
Batch execution inputs/validation flows
Fee tracking structure (FeeTracker) + event-based auditability
Operational recovery paths (rollback flows)

TM-BatchServer (Batch Execution Server)

gRPC-based batch API
Queue/polling based execution per transaction type
Gas/nonce awareness + failure classification + retry policy, with logs for observability

05 / Factual evidence

ACTUAL PROJECT ASSET / NOT GENERATED

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