Cleanup book (#1904)
* Cleanup book * Distinguish upstream from downstream validators * Add BroadcastStage to Fullnode/Tpu diagrams * First attempt to re-describe the runtime * Reorg book Push back details of the fullnode implementation
This commit is contained in:
Greg Fitzgerald
GitHub
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.------------------------.
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| Fullnode |
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| |
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.--------. | .----------------. |
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| |---->| | |
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| Client | | | JsonRpcService | |
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| |<----| | |
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`----+---` | `----------------` |
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| | ^ |
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| | | |
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| | .--+---. .-----. |
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| | | Bank |<--| Tvu | |
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| | `------` `-----` |
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| | ^ ^ |
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| | | | | .------------.
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| | .--+--. .--+--. | | |
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`-------->| Tpu +-->| Ncp |<-------->| Validators |
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| `-----` `-----` | | |
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| | `------------`
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`------------------------`
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.---------------------------.
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| Fullnode |
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| |
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.--------. | .----------------. |
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| |---->| | |
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| Client | | | JsonRpcService | |
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| |<----| | |
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`----+---` | `----------------` |
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| | ^ | .------------------.
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| | | .-----. | | Validators |
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| | | | Ncp |<---------->| |
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| | | `---+-` | | .------------. |
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| | | ^ | | | | | |
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| | | | v | | | Upstream | |
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| | .--+---. .-+---. | | | Validators | |
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| | | Bank |<--| Tvu |<--------------+ | |
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| | `------` `-----` | | `------------` |
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| | ^ | | |
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| | | | | .------------. |
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| | .--+--. .-----------. | | | | |
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`-------->| Tpu +-->| Broadcast +--------->| Downstream | |
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| `-----` | Stage | | | | Validators | |
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| `-----------` | | | | |
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| | | `------------` |
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`---------------------------` | |
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`------------------`
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32
art/tpu.bob
32
art/tpu.bob
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@ -1,19 +1,19 @@
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.----------------------------------------------------.
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| Tpu .------------. |
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| | PohService | |
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| `-------+----` |
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| ^ | |
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| | v |
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| .-------. .-----------. .-+-------. .-------. |
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.---------. | | Fetch | | SigVerify | | Banking | | Write | | .------------.
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| Clients |--->| Stage |->| Stage |->| Stage |-->| Stage +--->| Validators |
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`---------` | | | | | | | | | | `------------`
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| `-------` `-----------` `----+----` `---+---` |
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`---------------------------------|------------|-----`
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.------------------------------------------------------.
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| Tpu .------------. |
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| | PohService | |
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| `-------+----` |
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| ^ | |
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| | v |
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| .-------. .-----------. .-+-------. .--------. | .------------.
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.---------. | | Fetch | | SigVerify | | Banking | | Ledger | | | Broadcast |
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| Clients |--->| Stage |->| Stage |->| Stage |-->| Write +---->| Stage |
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`---------` | | | | | | | | Stage | | | |
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| `-------` `-----------` `----+----` `---+----` | `------------`
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`---------------------------------|------------|-------`
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| |
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v v
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.------. .--------.
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39
art/tvu.bob
39
art/tvu.bob
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@ -1,18 +1,21 @@
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.--------------------------------------------.
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| |
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| .------------------------------------|---------------------------------------.
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| | Tvu | |
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| | | |
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v | .-------. .------------. .----+---------. .--------. .---------. |
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.--------. | | Blob | | Retransmit | | Replicate | | Ledger | | Storage | |
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| Leader |----->| Fetch |-->| Stage |-->| Stage |-->| Write |-->| Stage | |
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`--------` | | Stage | | | | | | Stage | | | |
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| `-------` `----+-------` `----+---------` `--------` `---------` |
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| ^ | | |
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| | | | |
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`--------|----------|----------------|---------------------------------------`
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| | |
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| V v
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.+-----------. .------.
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| Validators | | Bank |
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`------------` `------`
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.--------.
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| Leader |
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`--------`
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^
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.------------------------------------|---------------------------------------.
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| Tvu | |
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| | |
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| .-------. .------------. .----+---------. .--------. .---------. |
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.------------. | | Blob | | Retransmit | | Replicate | | Ledger | | Storage | |
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| Upstream +----->| Fetch |-->| Stage |-->| Stage |-->| Write |-->| Stage | |
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| Validators | | | Stage | | | | | | Stage | | | |
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`------------` | `-------` `----+-------` `----+---------` `--------` `---------` |
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| ^ | | |
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| | | | |
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`--------|----------|----------------|---------------------------------------`
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| | |
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| V v
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.+-----------. .------.
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| Ncp | | Bank |
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`------------` `------`
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@ -4,14 +4,7 @@
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- [Terminology](terminology.md)
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- [On-chain programs](programs.md)
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- [The Runtime](runtime.md)
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- [Fullnode](fullnode.md)
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- [Tpu](tpu.md)
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- [Tvu](tvu.md)
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- [Ncp](ncp.md)
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- [JsonRpcService](jsonrpc-service.md)
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- [Programming Model](programs.md)
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- [A Solana Cluster](cluster.md)
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- [Synchronization](synchronization.md)
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@ -21,6 +14,13 @@
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- [Ledger Replication](storage.md)
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- [Leader Rotation](leader-scheduler.md)
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- [Anatomy of a Fullnode](fullnode.md)
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- [Tpu](tpu.md)
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- [Tvu](tvu.md)
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- [Ncp](ncp.md)
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- [JsonRpcService](jsonrpc-service.md)
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- [The Runtime](runtime.md)
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## Appendix
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- [Appendix](appendix.md)
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@ -276,7 +276,7 @@ SigVerify
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@ -291,7 +291,7 @@ Banking
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@ -302,11 +302,16 @@ Bank
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@ -316,8 +321,13 @@ Ledger
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280
src/img/tvu.svg
280
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@ -1,4 +1,4 @@
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Leader
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Upstream
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Tvu
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Blob
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Fetch
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Stage
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Validators
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Tvu
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Blob
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<g>
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|
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Fetch
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Stage
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Ncp
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<g>
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|
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Retransmit
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Stage
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Leader
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<g>
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|
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Replicate
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</text>
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|
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<g>
|
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|
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<text x="417" y="172">
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Stage
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<g>
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Bank
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</text>
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</g>
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<g>
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Ledger
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</text>
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|
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<g>
|
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<text x="537" y="124">
|
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<text x="569" y="172">
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Write
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</text>
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<g>
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Stage
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</text>
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<g>
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<text x="673" y="156">
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Storage
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</text>
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<g>
|
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|
|
|
|||
|
Before Width: | Height: | Size: 7.7 KiB After Width: | Height: | Size: 8.1 KiB |
|
|
@ -1,3 +1,3 @@
|
|||
# Ncp
|
||||
# The Network Control Plane
|
||||
|
||||
The Network Control Plane implements a gossip network between all nodes on in the cluster.
|
||||
The Network Control Plane (Ncp) implements a gossip network between all nodes on in the cluster.
|
||||
|
|
|
|||
|
|
@ -1,6 +1,4 @@
|
|||
# The Solana SDK
|
||||
|
||||
## Introduction
|
||||
# Programming Model
|
||||
|
||||
With the Solana runtime, we can execute on-chain programs concurrently, and
|
||||
written in the client’s choice of programming language.
|
||||
|
|
@ -21,14 +19,14 @@ ELF and passes it the client's message for interpretation.
|
|||
Solana supports several kinds of persistent storage, called *accounts*:
|
||||
|
||||
1. Executable
|
||||
2. Writable by a client
|
||||
3. Writable by a program
|
||||
4. Read-only
|
||||
2. Owned by a client
|
||||
3. Owned by a program
|
||||
4. Credit-only
|
||||
|
||||
All accounts are identified by public keys and may hold arbirary data.
|
||||
When the client sends messages to programs, it requests access to storage
|
||||
using those keys. The runtime loads the account data and passes it to the
|
||||
program. The runtime also ensures accounts aren't written to if not owned
|
||||
by the client or program. Any writes to read-only accounts are discarded
|
||||
by the client or program. Any writes to credit-only accounts are discarded
|
||||
unless the write was to credit tokens. Any user may credit other accounts
|
||||
tokens, regardless of account permission.
|
||||
|
|
|
|||
100
src/runtime.md
100
src/runtime.md
|
|
@ -1,39 +1,29 @@
|
|||
# Runtime
|
||||
|
||||
The goal with the runtime is to have a general purpose execution environment
|
||||
that is highly parallelizable. To achieve this goal the runtime forces each
|
||||
Instruction to specify all of its memory dependencies up front, and therefore a
|
||||
single Instruction cannot cause a dynamic memory allocation. An explicit
|
||||
Instruction for memory allocation from the `SystemProgram::CreateAccount` is
|
||||
the only way to allocate new memory in the engine. A Transaction may compose
|
||||
multiple Instruction, including `SystemProgram::CreateAccount`, into a single
|
||||
atomic sequence which allows for memory allocation to achieve a result that is
|
||||
similar to dynamic allocation.
|
||||
The runtime is a concurrent transaction processor. Transactions specify their
|
||||
data dependencies upfront and dynamic memory allocation is explicit. By
|
||||
separating program code from the state it operates on, the runtime is able to
|
||||
choreograph concurrent access. Transactions accessing only credit-only
|
||||
accounts are executed in parallel whereas transactions accessing writable
|
||||
accounts are serialized. The runtime interacts with the program through an
|
||||
entrypoint with a well-defined interface. The userdata stored in an account is
|
||||
an opaque type, an array of bytes. The program has full control over its
|
||||
contents.
|
||||
|
||||
The transaction structure specifies a list of public keys and signatures for
|
||||
those keys and a sequential list of instructions that will operate over the
|
||||
states associated with the account keys. For the transaction to be committed
|
||||
all the instructions must execute successfully; if any abort the whole
|
||||
transaction fails to commit.
|
||||
|
||||
### State
|
||||
### Account structure
|
||||
|
||||
State is addressed by an Account which is at the moment simply the Pubkey. Our
|
||||
goal is to eliminate memory allocation from within the program itself. Thus
|
||||
the client of the program provides all the state that is necessary for the
|
||||
program to execute in the transaction itself. The runtime interacts with the
|
||||
program through an entry point with a well defined interface. The userdata
|
||||
stored in an Account is an opaque type to the runtime, a `Vec<u8>`, the
|
||||
contents of which the program code has full control over.
|
||||
|
||||
The Transaction structure specifies a list of Pubkey's and signatures for those
|
||||
keys and a sequential list of instructions that will operate over the state's
|
||||
associated with the `account_keys`. For the transaction to be committed all
|
||||
the instructions must execute successfully, if any abort the whole transaction
|
||||
fails to commit.
|
||||
|
||||
### Account structure Accounts maintain token state as well as program specific
|
||||
memory.
|
||||
Accounts maintain a token balance and program-specific memory.
|
||||
|
||||
# Transaction Engine
|
||||
|
||||
At its core, the engine looks up all the Pubkeys maps them to accounts and
|
||||
routs them to the `program_id` entry point.
|
||||
The engine maps public keys to accounts and routes them to the program's
|
||||
entrypoint.
|
||||
|
||||
## Execution
|
||||
|
||||
|
|
@ -41,48 +31,48 @@ Transactions are batched and processed in a pipeline
|
|||
|
||||
<img alt="Runtime pipeline" src="img/runtime.svg" class="center"/>
|
||||
|
||||
At the `execute` stage, the loaded pages have no data dependencies, so all the
|
||||
At the *execute* stage, the loaded pages have no data dependencies, so all the
|
||||
programs can be executed in parallel.
|
||||
|
||||
The runtime enforces the following rules:
|
||||
|
||||
1. The `program_id` code is the only code that will modify the contents of
|
||||
`Account::userdata` of Account's that have been assigned to it. This means
|
||||
that upon assignment userdata vector is guaranteed to be `0`.
|
||||
1. Only the *owner* program may modify the contents of an account. This means
|
||||
that upon assignment userdata vector is guaranteed to be zero.
|
||||
2. Total balances on all the accounts is equal before and after execution of a
|
||||
Transaction.
|
||||
3. Balances of each of the accounts not assigned to `program_id` must be equal
|
||||
to or greater after the Transaction than before the transaction.
|
||||
4. All Instructions in the Transaction executed without a failure.
|
||||
transaction.
|
||||
3. After the transaction is executed, balances of credit-only accounts must be
|
||||
greater than or equal to the balances before the transaction.
|
||||
4. All instructions in the transaction executed atomically. If one fails, all
|
||||
account modifications are discarded.
|
||||
|
||||
## Entry Point Execution of the program involves mapping the Program's public
|
||||
key to an entry point which takes a pointer to the transaction, and an array of
|
||||
loaded pages.
|
||||
Execution of the program involves mapping the program's public key to an
|
||||
entrypoint which takes a pointer to the transaction, and an array of loaded
|
||||
pages.
|
||||
|
||||
## System Interface
|
||||
## SystemProgram Interface
|
||||
|
||||
The interface is best described by the `Instruction::userdata` that the
|
||||
user encodes.
|
||||
* `CreateAccount` - This allows the user to create and assign an Account to a
|
||||
The interface is best described by the `Instruction::userdata` that the user
|
||||
encodes.
|
||||
|
||||
* `CreateAccount` - This allows the user to create and assign an account to a
|
||||
Program.
|
||||
* `Assign` - allows the user to assign an existing account to a `Program`.
|
||||
* `Move` - moves tokens between `Account`s that are associated with
|
||||
`SystemProgram`. This cannot be used to move tokens of other `Account`s.
|
||||
Programs need to implement their own version of Move.
|
||||
* `Assign` - allows the user to assign an existing account to a program.
|
||||
* `Move` - moves tokens between account's that are associated with
|
||||
* `Spawn` - spawn a new program from an account
|
||||
|
||||
## Notes
|
||||
|
||||
1. There is no dynamic memory allocation. Client's need to call the
|
||||
`SystemProgram` to create memory before passing it to another program. This
|
||||
Instruction can be composed into a single Transaction with the call to the
|
||||
1. There is no dynamic memory allocation. Client's need to use `CreateAccount`
|
||||
instructions to create memory before passing it to another program. This
|
||||
instruction can be composed into a single transaction with the call to the
|
||||
program itself.
|
||||
2. Runtime guarantees that when memory is assigned to the `Program` it is zero
|
||||
2. Runtime guarantees that when memory is assigned to the program it is zero
|
||||
initialized.
|
||||
3. Runtime guarantees that `Program`'s code is the only thing that can modify
|
||||
3. Runtime guarantees that a program's code is the only thing that can modify
|
||||
memory that its assigned to
|
||||
4. Runtime guarantees that the `Program` can only spend tokens that are in
|
||||
`Account`s that are assigned to it
|
||||
5. Runtime guarantees the balances belonging to `Account`s are balanced before
|
||||
4. Runtime guarantees that the program can only spend tokens that are in
|
||||
accounts that are assigned to it
|
||||
5. Runtime guarantees the balances belonging to accounts are balanced before
|
||||
and after the transaction
|
||||
6. Runtime guarantees that multiple instructions all executed successfully when
|
||||
a transaction is committed.
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
# Introduction to VDFs
|
||||
# Verifiable Delay Functions
|
||||
|
||||
A Verifiable Delay Function is conceptually a water clock where its water marks
|
||||
can be recorded and later verified that the water most certainly passed
|
||||
|
|
|
|||
Loading…
Reference in New Issue