A transaction hash is a unique identifier for every transaction recorded on the blockchain. People use these to find details regarding a specific transaction or transfer.
Here is how to navigate:
Start by copying your wallet address from the fomo app. Go to Settings, then Account, then scroll down. You will see your Solana address and your EVM address. Copy the one that matches the network the transaction or transfer you are trying to find.
Paste your wallet address into the search bar of the blockchain explorer for that network. This will load your account page. Here is where to go and what to look for on each network:
For Solana, use solscan.io. Select the Transfers tab. The hash is in the Signature column.
For Base, use basescan.org. Select the Token Transfers (ERC-20) tab. The hash is in the Transaction Hash column.
For BNB Chain, use bscscan.com. Select the Token Transfers (BEP-20) tab. The hash is in the Transaction Hash column.
For Monad, use monad.socialscan.io. The hash is in the Txn Hash column on the Transactions tab.
Transactions settle as transfers, so this is the easier tab to navigate to find what you are looking for. Find the transfer you are looking for by matching the time, amount, and token. Each hash has a copy icon next to it that copies the entire unique transaction hash.
For Ethereum, use etherscan.io. Select the Transfers tab. The hash is in the Transaction Hash column.