Stablecoin Activity Enriched (EVM)

Transfer-level stablecoin activity classification across 37 supported EVM chains

The stablecoins_evm.activity_enriched table classifies each stablecoin transfer into an activity category (for example DEX, CEX, bridge, lending, issuer).

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Why these enriched tables matter

Stablecoin analysis comes down to two fundamental questions:

1. Where are stablecoins right now? (balances)
2. How did they get there? (activity)

This activity-enriched table answers the second question by tracing the economic path of transfers across categories such as DEX trading, lending, borrowing, bridging, internal transfers, and payment-like flows.

What this dataset is designed to do

• Explain how stablecoin balances move through the ecosystem.
• Attribute transfer activity with transparent, reproducible logic.
• Provide a defensible foundation for flow analysis.

The goal is to turn stablecoin flow data from noise into structured economic insight.

Table schema

Column	Type	Description
blockchain	VARCHAR	Chain name
block_month	DATE	First day of month (partition column)
block_date	DATE	Transaction date
block_time	TIMESTAMP	Transaction timestamp
block_number	BIGINT	Block number
tx_hash	VARBINARY	Transaction hash
evt_index	BIGINT	Transfer event index
activity_evt_index	BIGINT	Matched activity event index (nullable)
trace_address	VARCHAR	Trace address (nullable)
token_standard	VARCHAR	Token standard (erc20)
token_address	VARBINARY	Token contract address
token_symbol	VARCHAR	Token symbol
currency	VARCHAR	ISO 4217 code
amount_raw	UINT256	Raw transfer amount
amount	DOUBLE	Decimals-adjusted amount
price_usd	DOUBLE	USD price used for valuation
amount_usd	DOUBLE	USD amount
from_address	VARBINARY	Sender
to_address	VARBINARY	Recipient
category	VARCHAR	Activity category
activity	VARCHAR	Activity label
project_address	VARBINARY	Matched project address (nullable)
project_name	VARCHAR	Matched project name (nullable)
project_version	VARCHAR	Matched project version (nullable)
unique_key	VARCHAR	Unique transfer identifier

Value possibilities

The category and activity columns are intentionally standardized so downstream models, dashboards, and monitoring can rely on deterministic value vocabularies.

category	Allowed activity values	Description
dex_swap	dex_swap	Direct swaps on decentralized exchanges and DEX aggregators (Uniswap, Curve, 1inch, etc.).
flashloan	flashloan_borrow, flashloan_repay	Atomic borrow-and-repay within a single transaction.
issuer	issuer_peg_rebalance	Peg stability module operations (e.g. Sky PSM, Spark PSM). Ethereum only.
yield	yield_deposit, yield_withdraw	Deposits and withdrawals from yield strategy contracts. Ethereum only.
cex	cex_deposit, cex_withdraw, cex_internal_transfer	Transfers to/from known centralized exchange wallets.
lending	lending_supply, lending_borrow, lending_repay, lending_withdraw	Supply, borrow, repay, and withdraw on lending protocols.
bridge	bridge_deposit, bridge_withdraw	Cross-chain transfers via bridge contracts.
dex_liquidity	dex_liquidity_supply, dex_liquidity_withdraw	Non-swap transfers to/from DEX contracts (liquidity adds/removes).
unidentified	unidentified_activity	Transfers not matched to any known activity pattern.

This mapping enables consistent flow segmentation, KPI rollups, and alerting logic without custom per-dashboard label handling.

As protocol coverage expands, new values may be added in backward-compatible fashion.

Methodology

Classification is done at the transfer level, not the transaction level.

1. Start from curated stablecoin transfer rows in stablecoins_evm.transfers.
2. Build candidate matches for each transfer against activity-specific datasets (for example DEX, bridge, CEX, flashloan, lending, and issuer signals) using transfer-level keys such as tx_hash, token identity, and amount context.
3. Resolve conflicts with a deterministic precedence order, so each transfer gets exactly one winning category.
4. Write unmatched transfers as unidentified to preserve full coverage instead of dropping rows.

Important interpretation details

• One transaction can map to multiple categories if it contains multiple stablecoin transfers.
• project_address, project_name, and project_version are populated only when a protocol/entity match exists.
• Priority rules improve consistency, but edge cases still exist when protocols emit similar transfer patterns in the same transaction.

Sample query

SELECT
    a.block_date
    , a.category
    , COUNT(*) AS transfers
    , SUM(a.amount_usd) AS volume_usd
FROM stablecoins_evm.activity_enriched AS a
WHERE a.blockchain = 'ethereum'
    AND a.block_date >= CURRENT_DATE - INTERVAL '30' DAY
GROUP BY a.block_date, a.category
ORDER BY a.block_date DESC, volume_usd DESC

Notes

• One transfer maps to one output row (highest-priority match wins).
• For performance, filter by blockchain and block_month.