Transactions
Users use a Meson-enabled wallet that will handle connecting to the Meson network
Mixnet
Once their transactions are ready, these transactions will be bundled up to be sent through the Meson network in order to cover the originator of the transaction
Blockchain
Once the transaction has propagated through the Meson network, it is then delivered to the transaction's blockchain destination. External observers of these blockchains won't be able to see who sent the transaction, just that the transaction came from the Meson network