The maximum depth of 4 nested cross-program invocations (CPIs) allowed within a single Solana transaction. Program A can call Program B, which can call Program C, which can call Program D, but no further nesting is permitted. This limit prevents unbounded recursion, stack overflows, and excessive compute consumption. The runtime enforces this limit and returns an error if exceeded.
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The maximum depth of 4 nested cross-program invocations (CPIs) allowed within a single Solana transaction. Program A can call Program B, which can call Program C, which can call Program D, but no further nesting is permitted. This limit prevents unbounded recursion, stack overflows, and excessive compute consumption. The runtime enforces this limit and returns an error if exceeded.
Usa primero la analogía corta para razonar mejor sobre el término cuando aparezca en código, docs o prompts.
Piensa en esto como parte del engranaje que mantiene funcionando el orden, la ejecución o el consenso de la red.
Ubica el término dentro de la capa de Solana en la que vive para razonar mejor sobre él.
Consenso, rotación de líderes, slots, epochs y el runtime.
Convierte el término de vocabulario en algo operacional para producto e ingeniería.
Este término desbloquea conceptos adyacentes rápido, así que funciona mejor cuando lo tratas como un punto de conexión y no como una definición aislada.
Usa este bloque compacto cuando quieras dar contexto sólido a un agente o asistente sin volcar toda la página.
Call Depth Limit (call-depth-limit) Categoría: Protocolo Base Definición: The maximum depth of 4 nested cross-program invocations (CPIs) allowed within a single Solana transaction. Program A can call Program B, which can call Program C, which can call Program D, but no further nesting is permitted. This limit prevents unbounded recursion, stack overflows, and excessive compute consumption. The runtime enforces this limit and returns an error if exceeded. Relacionados: Invocación Entre Programas (CPI), invoke(), Runtime
Usa contexto del glosario, relaciones entre términos, modelos mentales y builder paths para recibir respuestas estructuradas en vez de output genérico.
Opcional: pega código Anchor, Solana o Rust para que el Copilot mapee primitivas de vuelta al glosario.
El Copilot responderá usando el término actual, conceptos relacionados, modelos mentales y el grafo alrededor del glosario.
Estas ramas muestran qué conceptos toca este término directamente y qué existe una capa más allá de ellos.
A mechanism for one program to call another program's instructions during execution. CPIs enable composability—e.g., a DeFi program can call the Token Program to transfer tokens. CPI depth is limited to 4 levels. The caller passes accounts and instruction data, and the callee runs with the same transaction context.
The Solana SDK function used to execute a CPI without PDA signing: `invoke(instruction, account_infos)`. All required signers must have already signed the outer transaction. Use invoke when calling programs that only need signatures from user wallets, not from PDAs.
The component of the SVM responsible for loading programs, enforcing account access rules (ownership, writability, signer checks), managing compute budgets, and executing transactions. The runtime ensures programs can only modify accounts they own, charges rent, and enforces the 10MB per-transaction account data limit.
Estos son los siguientes conceptos que vale la pena abrir si quieres que este término tenga más sentido dentro de un workflow real de Solana.
Las entradas del glosario se vuelven útiles cuando están conectadas. Estos enlaces son el camino más corto hacia ideas adyacentes.
A mechanism for one program to call another program's instructions during execution. CPIs enable composability—e.g., a DeFi program can call the Token Program to transfer tokens. CPI depth is limited to 4 levels. The caller passes accounts and instruction data, and the callee runs with the same transaction context.
The Solana SDK function used to execute a CPI without PDA signing: `invoke(instruction, account_infos)`. All required signers must have already signed the outer transaction. Use invoke when calling programs that only need signatures from user wallets, not from PDAs.
The component of the SVM responsible for loading programs, enforcing account access rules (ownership, writability, signer checks), managing compute budgets, and executing transactions. The runtime ensures programs can only modify accounts they own, charges rent, and enforces the 10MB per-transaction account data limit.
Estas entradas viven junto al término actual y ayudan a que la página se sienta parte de un grafo de conocimiento más amplio en lugar de un callejón sin salida.
A clock mechanism that cryptographically proves the passage of time between events. PoH uses a sequential SHA-256 hash chain where each output becomes the next input, creating a verifiable ordering of events without requiring consensus. The leader produces ~400,000 hashes per slot (~400ms), and any validator can verify the sequence in parallel, enabling Solana's high throughput by removing the need for validators to agree on time.
Solana's custom BFT consensus algorithm built on top of Proof of History. Tower BFT uses PoH as a clock to reduce communication overhead in traditional PBFT from O(n²) to O(n). Validators vote on forks with exponentially increasing lockout periods—each consecutive vote doubles the lockout, making rollbacks progressively more expensive. A fork is finalized when it reaches supermajority (66.7%+ of stake).
A time window during which a designated leader validator can produce a block. Each slot lasts approximately 400 milliseconds. Slots are numbered sequentially from genesis and grouped into epochs of 432,000 slots (~2-3 days). Not every slot produces a block—a skipped slot means the leader was offline or too slow.
A set of entries produced by a leader during a single slot. A block contains transactions bundled into entries, each with a PoH hash proving ordering. Blocks are broken into shreds for network propagation via Turbine. Maximum block size is limited by compute units (48M CU cap per block) rather than byte size.