architecture.iuml

@startuml
!theme bluegray
skinparam componentStyle rectangle

'-----------components----------
rectangle "<size:20><&browser></size> Admin Frontend" as AF
rectangle "<size:20><&phone></size> Mobile App" as MA
rectangle "<size:20><&browser></size> Web Wallet" as WW
rectangle "<size:20><&laptop></size> Other App" as OA

package "Galoy Server"{
[Admin GQL API] as AA
[Client GQL API] as GA
[Ledger ❹] as LG
[Server Backend] as SB
}

together {
[Ride the Lightning] as RTL
component LND [
<b>LND

- Hot Wallet
- Lightning Node ]
  }
  component Specter[
  <b>Specter
- Cold Storage
- Multisig Coordinator ]

component bitcoind[
**bitcoind** ]

cloud "lightning network" as lightning
cloud "Bitcoin network" as btcnet

'-----------connections----------
'Galoy Server Connections
AF -u-> AA
MA --> GA
WW --> GA
OA --> GA
'For better formatting
GA -[hidden]r- AA

SB - GA
LG <- SB : updates

LG ...> LND
LG ...> Specter

SB --> LND : <size:22>❶</size>\npayments\nrebalance
SB --> Specter : <size:22>❷</size> rebalance
LND -- lightning
RTL -r-> LND : manages
Specter --> bitcoind : depends on
LND --> bitcoind : <size:22>❸</size>\ndepends on
bitcoind -- btcnet

legend
<size:22>❶</size> Galoy gets payment information from LND. On-chain as well as Lightning.

<size:22>❷</size> Backend rebalances between LND and Specter.

<size:22>❸</size> LND connected to bitcoind RPC & zeromq.

<size:22>❹</size> Ledger keeps track of user wallets. Audits BTC hot & cold wallet.
endlegend
@enduml