Methodology & Standards

Environmental Assessment Methodology

How Toucan Protocol estimates the network-attributed environmental footprint of Solana wallet activity and transactions.

Fundamental Attribution Principle

Toucan Protocol does not physically measure the power drawn by an end-user's phone or computer. Instead, it assesses the network-attributed impact—the proportional share of the entire Solana validator network's electrical power and carbon footprint required to validate, execute, and store your transactions.

Calculation Formulas

1. Estimated Network Energy

Energy (Wh) = Transactions × 0.00792 Wh

Each finalized Solana transaction requires approximately 0.00792 Watt-hours of network electrical consumption across all cluster validators.

2. Estimated Network Carbon

Carbon (gCO₂e) = Transactions × 0.00251 gCO₂e

Network carbon intensity accounts for the global geographical distribution and grid emissions factors of Solana validator hardware.

Configuration Constants

Revision: 2026-09-07

All constants are centralized in /lib/climate-config.ts so they can be versioned transparently as Solana's validator efficiency improves over time.

METRIC	VALUE	UNIT	BENCHMARK SOURCE
Energy / Transaction	0.00792	Wh	Solana Climate Dashboard / CCRI
Carbon / Transaction	0.00251	gCO₂e	Solana Climate Dashboard / CCRI

Human-Understandable Equivalence Models

Raw Watt-hours and grams of carbon can be abstract. We normalize these numbers against audited everyday mechanical and electrical equivalents:

LED Light Bulb Runtime

Reference assumption: 9W LED bulb producing ~800 lumens equivalent to a 60W incandescent bulb.

Source: U.S. Department of Energy (DOE) - Lighting Choices to Save You Money

Smartphone Full Charges

Includes typical 80% charging cradle/adapter efficiency and 3,500mAh nominal lithium-ion cell capacity.

Source: Lawrence Berkeley National Laboratory / Energy Star Battery Charger Standards

Electric Vehicle Travel

Standard real-world combined city/highway efficiency: ~160 Wh/km (approx 257 Wh/mile).

Source: International Energy Agency (IEA) Global EV Outlook & EPA Fuel Economy Guidelines

Boiling Water for Tea/Coffee

Assumes heating 250 ml tap water from 20°C to 100°C with 90% electric element thermal transfer efficiency.

Source: Engineering ToolBox - Specific Heat Capacity of Water & Electric Kettle Efficiency

Limitations & Scope

Network Average vs. Individual Complexity: Calculation utilizes network average transaction metrics. High-compute transactions and simple SOL transfers are evaluated against the cluster average.
Not a Carbon Offset or Certification: Toucan Protocol makes zero certification claims. Generating a receipt does not imply carbon neutral status or the retirement of certified voluntary carbon credits.
Scan Caps: To protect public zero-cost infrastructure, wallet scanning is capped at 10,000 transactions (50,000 for deep scans).

Audited External Citations

Toucan Protocol builds upon open methodology published by the Solana Foundation and independent climate auditors:

Solana ClimateLive Dashboard

Solana FoundationEnergy Reports

CCRICarbon Ratings Institute