Methodology

The main source for creating this analysis is Flipside's avalanche.core. tables. - BTC.b Contract address on Avalanche: 0x152b9d0fdc40c096757f570a51e494bd4b943e50 (Decimals: 8) - Avalanche Bridge: Bitcoin Contract Address: 0xf5163f69f97b221d50347dd79382f11c6401f1a1 - Layer0 Bridge Contract Address: 0x2297aebd383787a160dd0d9f71508148769342e3 To extract the data related to the BTC.b bridges, I have used avalanche.core.fact_event_logs table and filtered the 'origin_from_address' column to the contract address of BTC.b bridge (0xf5163f69f97b221d50347dd79382f11c6401f1a1). (since the bridged bitcoins are transferred to the bridgers from this address). by filtering the 'event_name' to "Transfer", we see there are 2 seperate events. one of them is related to the transferring of bridged BTC to bridger, another one is related to the generated fee from this transaction. So, we have to exclude the Fee-related event. For this, I have used 'event_index' column in order to only extract the event that belong to the first emitted event by this transaction (which is related to the actual transfer of bridged BTC to the bridger). Bridger wallet address is extractable from 'event_inputs:to' column and from 'event_inputs:value/pow(10,8)' we can extract the adjusted volume of bridged BTC to the Avalanche chain. To extract the data related to the Layer0 bridge, I have also used the event_logs table and filtered the 'origin_to_address' column to the contract address of Layer0 bridge (0x2297aebd383787a160dd0d9f71508148769342e3), contract_address column should be BTC.b contract address and the event_name should be "Transfer". From the 'Topics' array [1], we can extract the init16 value of destination chain_id. Based on the [Layer0 Docs](https://layerzero.gitbook.io/docs/technical-reference/mainnet/supported-chain-ids), we can identify the blockchain name related to each chain_id to extract the destination of BTC.b bridges via Layer0.

External Sources:

https://www.coindesk.com/markets/2023/01/19/bitcoin-bridged-to-avalanche-surpasses-btc-locked-in-lightning-network/ https://www.coindesk.com/markets/2023/03/03/record-btcb-mint-lifts-bitcoin-on-avalanche-tally-above-8k/ https://layerzero.gitbook.io/docs/

Avalanche BTC.b Bridgooors