リップルコイン (XRP) トケノミクス

The token economics of XRP, the native asset of the XRP Ledger (XRPL), are defined by a fixed total supply, a unique initial allocation, and a programmatic escrow system designed to manage circulating supply. Unlike many other cryptocurrencies, XRP was entirely pre-mined and utilizes a deflationary mechanism through transaction fee burning.

Issuance Mechanism

The XRP token has a fixed total supply of 100 billion tokens.

• Pre-Mined Supply: All 100 billion XRP were created at the inception of the XRP Ledger when it was launched in 2012. There is no mining or staking mechanism to create new XRP, meaning the total supply is capped and will not increase.
• Deflationary Pressure: The circulating supply of XRP is subject to deflationary pressure because all transaction fees paid on the XRPL are permanently burned (destroyed) by the network. This mechanism ensures that the total supply of XRP gradually decreases over time.

Allocation Mechanism

The initial allocation of the 100 billion XRP supply was highly centralized, primarily distributed between the founding team and Ripple Labs Inc.

The 20 billion XRP allocated to the founding team was further broken down:

• Chris Larsen: 9.5 billion XRP (9.50% of total supply)
• Arthur Britto: 1.0 billion XRP (1.00% of total supply)
• Jed McCaleb: 9.5 billion XRP (9.50% of total supply)

Of the 80 billion XRP initially gifted to Ripple Labs Inc., the company regularly sold XRP to strengthen markets, improve network liquidity, and incentivize ecosystem development.

Locking Mechanism and Unlocking Time

To manage the release of the large allocation held by Ripple, a significant portion was placed into programmatic escrow contracts.

• Escrow Commitment: In 2017, Ripple placed 55 billion XRP (55.00% of the initial total supply) into escrow contracts.
• Monthly Release: These contracts are programmed to release 1 billion XRP to Ripple each month over a period of 55 months.
• Unspent XRP: Any XRP that Ripple does not spend or distribute within that month is placed back into new escrow contracts. This unspent amount is then scheduled for release in the first month in which no other escrow is currently scheduled to release. This system prevents Ripple from flooding the market with tokens and ensures a predictable, controlled release schedule.
• Current Status: As of early 2024, approximately 40.51 billion XRP were held in escrow, with the remaining supply circulating. The system will continue until all escrowed tokens become liquid.

Usage and Incentive Mechanism

XRP serves several critical utility functions within the XRP Ledger ecosystem, primarily focused on facilitating fast, low-cost value transfer and maintaining network integrity.

Primary Use Cases

1. Medium of Exchange and Bridge Currency: XRP is designed to be a highly efficient medium of exchange, particularly for cross-border payments. It acts as a bridge currency in Ripple’s On-Demand Liquidity (ODL) service, allowing financial institutions to source liquidity instantly without needing to pre-fund accounts in various fiat currencies globally.
2. Transaction Fees (Deflationary Mechanism): All transaction fees on the XRPL are paid in XRP and are burned. This is a core deflationary mechanism. Transaction costs are deterministic and extremely low, typically costing 10 drops (a drop is one millionth of an XRP).
3. Reserves and Anti-Spam: The XRPL requires accounts to hold a minimum reserve of 10 XRP to interact with the network. Additionally, accounts that own "Trust Lines" (used for holding non-XRP tokens) must hold an additional reserve of two XRP per Trust Line. These reserve requirements are designed to make Sybil attacks and spamming the ledger prohibitively expensive.
4. Decentralized Exchange (DEX) Liquidity: XRP is used in the XRPL's native decentralized exchange (DEX). The network employs an auto-bridging feature that uses XRP as an intermediary when trading two non-XRP currencies, optimizing the total exchange rate and increasing liquidity across currency pairs.

Incentives and Rewards

The XRPL's consensus mechanism, Proof-of-Association (PoA), does not offer direct financial rewards to validators or token holders.

• No Staking Rewards: Unlike Proof-of-Stake networks, XRP token holders and XRPL users do not earn fees, additional tokens, or any form of compensation (such as staking rewards or dividends) simply by holding XRP or interacting with the network.
• Validator Incentives: Validators are incentivized by supporting the decentralization and integrity of the network, similar to running a full node on Bitcoin or Ethereum, rather than receiving financial rewards.
• Ecosystem Funding: Ripple supports ecosystem growth through initiatives like XRPL Grants, which distributes XRP to developers building on the ledger.

Emerging DeFi Utility

While the XRPL does not natively support smart contracts with arbitrary logic, new mechanisms are being introduced to enhance utility:

• Automated Market Maker (AMM): An AMM functionality was voted into the protocol, allowing holders to earn a share of trade fees by providing liquidity to pools. The AMM design includes a mechanism where liquidity providers can bid LP tokens for an auction slot, granting a discount on trading fees for a 24-hour period, which incentivizes price balancing with external markets.
• Escrow Functionality: The XRPL natively supports escrow, allowing users to lock up XRP for conditional payments that unlock when certain conditions are met.