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crosschain.bridges.matched_transfers pairs outbound bridge transactions on the source chain with their corresponding inbound delivery transactions on the destination chain. Each row represents a single confirmed end-to-end bridge transfer with both legs reconciled, along with hydrated token amounts, USD values, spread, and latency metrics.
Only matched pairs are included — outbound transactions that could not be matched to an inbound delivery (e.g. in-flight, refunded, or missing data) are excluded from this view. Query the per-direction tables (crosschain.bridges.bridges_outbound_transfers, crosschain.bridges.messaging_protocols_outbound_messages, crosschain.bridges.bridge_aggregators_outbound_transfers) if you need to see unmatched outbound activity.

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Protocol Coverage

Matched transfers are produced for 17 bridge and messaging protocols, grouped by bridge_type:
Bridge TypeProtocols
bridgeacross_v3, debridge_dln, debridge_gate, gas_zip_lz_v2, mayan_mctp, mayan_swift, stargate_v2, usdt0
messaging_protocolaxelar, chainlink_ccip, circle_cctp_v1, circle_cctp_v2, hyperlane, layerzero_v2, socket_dl_v1, wormhole
bridge_aggregatorbungee_v3

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Match Types

The match_type column describes how the outbound and inbound legs were paired:
  • exact: deterministic join on a protocol-native identifier (e.g. deposit_id, LayerZero guid, CCTP nonce, Wormhole sequence, Axelar command_id, order hash).
  • composite: joined on a combination of recipient address, token, amount, and a source→destination chain pair within a time window, for protocols where no single global identifier is emitted on both sides.

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Spread & Latency

  • spread_percentage = (outbound_usd_amount - inbound_usd_amount) / outbound_usd_amount * 100. Nulled out when either USD amount is missing, the outbound amount is zero, or the absolute spread exceeds 25% (usually a sign of a mispriced token or mismatched pair).
  • latency_seconds = seconds elapsed from outbound to inbound block timestamp. Can be negative for intent-based protocols (Across, DeBridge DLN, Mayan Swift) where fillers front funds on the destination chain before the source-side transaction is finalized. Nulled out when outside the -3600s to 86400s range.

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Sample Queries

Average bridge latency and spread by protocol over the last 7 days. 
SELECT
    project,
    protocol,
    bridge_type,
    COUNT(*) AS matched_transfers,
    AVG(latency_seconds) AS avg_latency_seconds,
    MEDIAN(latency_seconds) AS median_latency_seconds,
    AVG(spread_percentage) AS avg_spread_pct,
    SUM(outbound_usd_amount) AS outbound_usd_volume
FROM crosschain.bridges.matched_transfers
WHERE outbound_block_timestamp >= CURRENT_TIMESTAMP - INTERVAL '7 days'
GROUP BY ALL
ORDER BY outbound_usd_volume DESC
Top cross-chain user flows (source → destination) by matched volume. 
SELECT
    CONCAT(source_chain, ' > ', destination_chain) AS flow,
    project,
    COUNT(*) AS transfers,
    COUNT(DISTINCT outbound_sender_address) AS unique_users,
    SUM(outbound_usd_amount) AS usd_volume
FROM crosschain.bridges.matched_transfers
WHERE outbound_block_timestamp >= CURRENT_TIMESTAMP - INTERVAL '30 days'
  AND outbound_usd_amount IS NOT NULL
GROUP BY ALL
ORDER BY usd_volume DESC
LIMIT 50

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Table Columns

Unique key: unique_id
Column NameData TypeDescription
projectVARCHARThe project or product name (e.g., across, stargate, layerzero).
protocolVARCHARThe specific protocol version identifier (e.g., across_v3, stargate_v2, layerzero_v2).
match_typeVARCHARHow the outbound and inbound legs were matched: exact (deterministic ID match) or composite (matched on recipient + amount within a time window).
bridge_typeVARCHARClassification of the protocol: bridge, messaging_protocol, or bridge_aggregator.
source_chainVARCHARThe chain where the bridge transfer originates (outbound side).
destination_chainVARCHARThe chain where the bridge transfer is delivered (inbound side).
outbound_token_addressVARCHARThe contract address of the token sent on the source chain.
outbound_token_symbolVARCHARToken ticker symbol on the source chain (e.g., USDC, ETH).
outbound_amount_rawVARCHARRaw outbound token amount, not adjusted for decimals.
outbound_amountFLOATDecimal-adjusted outbound token amount.
outbound_usd_amountFLOATUSD value of the outbound transfer at the time of the transaction. NULL if price unavailable or exceeds the $2B cap.
inbound_token_addressVARCHARThe contract address of the token received on the destination chain.
inbound_token_symbolVARCHARToken ticker symbol on the destination chain.
inbound_amount_rawVARCHARRaw inbound token amount, not adjusted for decimals.
inbound_amountFLOATDecimal-adjusted inbound token amount.
inbound_usd_amountFLOATUSD value of the inbound transfer at the time of the transaction. NULL if price unavailable or exceeds the $2B cap.
spread_percentageFLOATPercentage difference between outbound and inbound USD amounts: (outbound - inbound) / outbound * 100. NULL when either USD amount is missing, outbound is zero, or spread exceeds 25%.
outbound_block_timestampTIMESTAMP_NTZ(9)Timestamp of the outbound (source chain) transaction.
inbound_block_timestampTIMESTAMP_NTZ(9)Timestamp of the inbound (destination chain) transaction.
latency_secondsBIGINTTime in seconds from outbound to inbound delivery. Can be negative for intent-based protocols where fillers front funds. NULL when outside the -3600 to 86400 second range.
outbound_sender_addressVARCHARThe address that initiated the bridge transfer on the source chain (the user).
inbound_recipient_addressVARCHARThe address that received funds on the destination chain (the user).
outbound_transaction_hashVARCHARTransaction hash of the outbound bridge event on the source chain.
inbound_transaction_hashVARCHARTransaction hash of the inbound delivery event on the destination chain.
outbound_recipient_addressVARCHARThe bridge contract or relayer address that received the outbound transfer on the source chain.
inbound_sender_addressVARCHARThe bridge contract or relayer address that sent the inbound transfer on the destination chain.
outbound_block_numberBIGINTBlock height of the outbound transaction on the source chain.
inbound_block_numberBIGINTBlock height of the inbound transaction on the destination chain.
outbound_unique_idVARCHARUnique identifier for the outbound leg. Joins back to the unique_id column of the corresponding outbound source table (bridges_outbound_transfers, messaging_protocols_outbound_messages, or bridge_aggregators_outbound_transfers).
inbound_unique_idVARCHARUnique identifier for the inbound leg. Joins back to the unique_id column of the corresponding inbound source table (bridges_inbound_transfers, messaging_protocols_inbound_messages, or bridge_aggregators_inbound_transfers).
join_keyVARCHARThe protocol-specific key used to match outbound and inbound legs (e.g., deposit_id, guid, nonce, order_id).
unique_idVARCHARA unique identifier for this matched transfer record.
_created_atTIMESTAMP_NTZ(9)Timestamp when this record was created in Allium.
_updated_atTIMESTAMP_NTZ(9)Timestamp when this record was last updated in Allium.