# Sessions
Two `logosctl` sessions, Alice and Bob, each with a funded wallet open in `lez_core`, the way an app or an agent talks to Logos. Alice pays Bob, then shields some of her funds into a private account. The devnet runs in dev mode, so the shielded transfer's proof takes a second instead of minutes.
`logos-devnet.toml` here gives the example a devnet of its own on port 3042, next to a shared one on 3040. If something else holds 3042, `logos-devnet up --port <another>` picks another one, and it's remembered.
## What you need
`logos-devnet`, Docker, `logosctl` (the Logos Core CLI) on your `PATH`, and `jq`.
## Run it
From this directory:
```bash
logos-devnet up
```
That starts the devnet and both sessions. Each one gets its own `logosctl` daemon with `lez_core` installed from the catalog, and a public account the faucet funded with 10B lepta. The commands below talk to whichever session `LOGOSCTL_CONFIG_DIR` names, which `logos-devnet session env <name>` sets:
```bash
call() { logosctl --json call lez_core "$@" | tail -1 | jq -r .result; }
source <(logos-devnet session env bob)
bob=$(call account_id_from_base58 "str:${LOGOS_DEVNET_ACCOUNT#Public/}")
source <(logos-devnet session env alice)
alice=$(call account_id_from_base58 "str:${LOGOS_DEVNET_ACCOUNT#Public/}")
call get_balance "str:$alice" true # 10000000000
```
`lez_core` takes account ids as hex, so they're converted from the base58 `Public/` id the session prints. `get_balance` takes `true` for a public account and `false` for a private one, and answers in lepta.
Alice sends Bob 1000 lepta. Amounts go in as 16 little-endian bytes, in hex:
```bash
amount=e8030000000000000000000000000000
call transfer_public "str:$alice" "str:$bob" "str:$amount"
sleep 2
call get_balance "str:$bob" true # 10000001000
```
Then she shields 1000 lepta into a new private account of her own. Her session proves the transfer, and on a devnet without dev mode that takes minutes. Her wallet reads the private account's state once it has synced the new blocks:
```bash
private=$(call create_account_private)
call transfer_shielded_owned "str:$alice" "str:$private" "str:$amount"
sleep 2
head=$(curl -fsS "$LOGOS_DEVNET_SEQUENCER" -H 'content-type: application/json' \
call get_balance "str:$private" false # 1000
```
From a fresh devnet, all of it takes about 30 s, most of it starting the sessions.
`logos-devnet session rm alice` and `session rm bob` stop and delete the sessions, `logos-devnet down` stops the devnet, and deleting `.logos-devnet` removes it.