Service Providers in the OKTC Blockchain Ecosystem

The OKTC blockchain is designed to support a wide range of decentralized applications and services, with service providers playing a pivotal role in delivering seamless user experiences. In this guide, we explore what it means to be a service provider on the OKTC network, the technical architecture involved, and how to effectively interact with the blockchain using full nodes, REST APIs, and secure transaction signing.

Whether you're building a decentralized finance (DeFi) platform, a token management dashboard, or any other blockchain-powered solution, understanding the infrastructure and tools available is essential for reliability, scalability, and security.

What Are Service Providers?

Service providers are entities that offer blockchain-based services to end-users, typically involving interactions with tokens, transactions, or account management on the OKTC network. These services may include payment gateways, exchange platforms, staking interfaces, or custodial solutions.

Unlike wallet developers focusing on light-client implementations, service providers act as trusted intermediaries between users and the blockchain. They are responsible for ensuring accurate data retrieval, secure transaction handling, and reliable network connectivity.

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Core Architecture Overview

To deliver robust and scalable services on OKTC, three foundational components form the backbone of the system:

Full Nodes

Full nodes maintain a complete copy of the blockchain ledger and validate all transactions and blocks. By running a full node, service providers gain direct access to real-time blockchain data without relying on third-party APIs—ensuring greater control, privacy, and reliability.

REST Server

The REST server acts as a bridge between HTTP-based applications and the underlying blockchain node. It translates standard HTTP requests into queries or actions that the full node can process, enabling web and mobile apps to interact with the blockchain seamlessly.

REST API

The REST API defines the set of endpoints available through the REST server. These endpoints allow developers to retrieve account balances, submit transactions, query block data, and more—all via simple HTTP calls.

Together, these components enable service providers to build responsive, secure, and decentralized applications powered by OKTC.

How to Run a Full Node on OKTC

Running your own full node is a critical step for any serious service provider. It ensures data integrity, reduces dependency on external services, and improves performance.

Step 1: Install the OKTC Software

Begin by installing the official OKTC command-line interface (exchaincli) and node software. This toolkit allows you to synchronize with the network, manage keys, and interact directly with the blockchain.

You can find detailed installation instructions in the official developer documentation. The setup supports multiple operating systems and includes binaries for quick deployment.

Step 2: Configure and Launch the Node

After installation, configure your node settings—such as peer connections, logging levels, and database paths—based on your infrastructure needs. Then, start syncing with the mainnet.

Initial synchronization may take several hours depending on your hardware and network speed. Once complete, your node will be fully operational and ready to serve API requests.

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Running a full node gives you full autonomy over data access and transaction broadcasting—critical for high-availability services.

Interacting via the REST API

The OKTC REST API provides a developer-friendly way to interact with the blockchain without dealing with low-level protocols.

Key Features of the REST API

Query Account Balances: Retrieve token holdings for any address.
Submit Transactions: Broadcast signed transactions to the network.
Fetch Block Data: Access historical blocks, transaction details, and event logs.
Generate Unsigned Transactions: Prepare transaction payloads without signing them—ideal for integrating custom signing logic.

This flexibility allows service providers to implement secure key management systems, such as hardware security modules (HSMs) or multi-signature wallets, while still leveraging standard API interfaces.

For full endpoint documentation, refer to the official REST API reference guide.

Secure Transaction Signing with OKTC SDK

Proper transaction signing is crucial for maintaining security and preventing replay attacks or signature malleability.

Understanding the Signing Process

Every transaction on OKTC has a canonical JSON representation. When preparing a transaction for signing:

The chain ID must match the target network (e.g., exchain-65).
The account number identifies the sender’s account on-chain.
The sequence number ensures transaction order and prevents replay attacks.

These values must be accurate; otherwise, the network will reject the signature.

The SDK automatically includes:

fee: Specifies gas price and limits.
msgs: Contains the actual operations (e.g., send tokens).
memo: Optional note attached to the transaction.

Best Practices for Signing

Query Account Info First
Use the REST API to fetch the latest account_number and sequence from the blockchain before constructing a transaction.
Sort Keys Lexicographically
Before signing, ensure all JSON object keys are sorted alphabetically. Whitespace should also be stripped from the final string.
Use Non-Malleable Signatures
Signatures are encoded as 64-byte concatenations of ECDSA r and s values. The value of s is normalized to be less than its elliptic curve inverse to prevent malleability—similar to Ethereum but without recovery bytes since Tendermint requires explicit public keys.
Insert Signature & Broadcast
Once signed, insert the signature into the transaction structure and broadcast it using exchaincli or via the REST API’s /txs endpoint.

Example Workflow

{
  "tx": {
    "msg": [...],
    "fee": {...},
    "signatures": [
      {
        "signature": "Base64Encoded64ByteSignature",
        "pub_key": {
          "type": "tendermint/PubKeySecp256k1",
          "value": "PubKeyInBase64"
        }
      }
    ],
    "memo": ""
  },
  "mode": "sync"
}

This structure ensures compatibility with both CLI tools and REST clients.

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Frequently Asked Questions (FAQ)

What is the difference between a service provider and a wallet developer?

Service providers focus on delivering backend infrastructure and trust-layer services (e.g., exchanges, payment processors), often using full nodes. Wallet developers typically build light clients that rely on external nodes for data.

Why should I run my own full node?

Running your own node eliminates reliance on third-party services, improves data accuracy, enhances security, and reduces latency—especially important for high-volume applications.

How do I prevent invalid signature errors?

Ensure correct chain_id, account_number, and sequence. Always query fresh values from the blockchain before signing. Mismatched sequence numbers are a common cause of failure.

Can I generate unsigned transactions?

Yes. The REST API allows you to generate unsigned transaction payloads so you can apply custom signing logic—ideal for HSMs or air-gapped signing environments.

Is signature malleability an issue on OKTC?

No. OKTC uses normalized s values in ECDSA signatures (like Bitcoin and Ethereum) to prevent malleability. This ensures each transaction has a unique, verifiable signature.

Where can I find updated API documentation?

Official REST API specifications are regularly updated and accessible through developer portals focused on OKTC integration.

Core Keywords: OKTC blockchain, service providers, full node, REST API, transaction signing, blockchain integration, secure transactions, exchaincli

By aligning technical implementation with best practices in architecture and security, service providers can deliver reliable, scalable solutions on the OKTC network—empowering users with fast, secure, and transparent blockchain experiences.