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Lerian SILOC is a financial institution’s participant-side connectivity to SILOC, the deferred multilateral net settlement system of the Central Bank of Brazil (BACEN), operated by the clearinghouse Nuclea. SILOC nets many interbank credit-order transactions and settles only the resulting net position on Nuclea’s settlement account at the STR, BACEN’s Reserve Transfer System. Two products settle through SILOC: boleto (Cobrança) and cards. Lerian SILOC gives an institution one direct path to SILOC. It owns the single messaging-gateway connection to Nuclea’s SILOC over the national financial-system network, relays the card-domain settlement traffic to Lerian SLC (Lerian’s card-settlement service), and administers participants, regulated certificates, and settlement-coverage capabilities.

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What Lerian SILOC does — and does not — do

Lerian SILOC carries messages and administers the participant’s connection. It holds no position and executes no transfer.
  • The netting and the final settlement of the net position are performed by SILOC and Nuclea, not by Lerian SILOC.
  • The STR deposit leg — the monetary settlement at BACEN — is executed by the separate STR rail, Lerian SPB, not by SILOC.
  • Lerian SILOC computes no cycle and performs no monetary arithmetic. It routes bytes and emits facts.
The service is single-institution: it connects one financial institution to SILOC, with no multi-tenancy.

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Who it serves

Lerian SILOC serves financial institutions that are direct or indirect SILOC participants under their own ISPB. The service opens and maintains their gateway connection to Nuclea, relays the card-domain settlement family to Lerian SLC, keeps a directory of the participants it settles for, and holds the regulated certificate references the connection requires.

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Glossary

TermMeaning
Lerian SILOCA financial institution’s native, participant-side connectivity to SILOC — gateway connection, card-domain relay, and administration.
SILOC — Sistema de Liquidação Diferida das Transferências Interbancárias de Ordens de CréditoBACEN’s deferred multilateral net settlement system, operated by Nuclea.
NucleaThe clearinghouse that operates SILOC and settles its net position at the STR/BACEN.
LDL — Liquidação Diferida LíquidaDeferred multilateral net settlement, SILOC’s settlement model.
Deferred net settlementSettling only the net position of many transactions at fixed daily cycle times, rather than each transaction individually.
STR — Sistema de Transferência de ReservasBACEN’s Reserve Transfer System, where SILOC’s net position is finally settled; the deposit leg is executed by the separate STR rail.
ParticipantAn institution in SILOC, classified as direct, indirect, or settling institution.
ISPBBACEN’s 8-digit participant identifier.
NUOp — Número Único da OperaçãoBACEN’s globally unique per-operation identifier, used as the deduplication key.
Boleto (Cobrança) and CardsThe two products that settle through SILOC; card settlement is handled by the sibling Lerian SLC service.
For how Lerian SILOC sits alongside the other native rails and the provider interfaces, see Native Messaging.