> ## Documentation Index > Fetch the complete documentation index at: https://aomi.dev/docs/llms.txt > Use this file to discover all available pages before exploring further. # SVM > Configure Solana RPC providers and understand how Aomi stages, signs, guards, and broadcasts SVM transactions. Aomi applies the same execution model to EVM and SVM requests, while preserving the transaction rules of each virtual machine. On Solana, the runtime routes a request by cluster, assembles instructions into a legacy or versioned transaction, applies the App's guards, requests the permitted signature, and submits through the selected broadcaster. `providers.toml` connects each recognized Solana cluster to an RPC endpoint. It also defines an optional fallback for transient transport failures. This configuration controls network access. It does not choose who may sign, change an App's program allowlist, or select the broadcaster for a transaction. ```mermaid theme={null} flowchart LR A["Request with cluster"] --> B["Primary RPC and simulation"] B --> C["Wallet policy and App guards"] C --> D["Selected broadcaster"] B -. "transport failure" .-> E["First fallback RPC"] ``` Read [Solana bundle](/docs/concepts/solana-bundle) for the instruction assembly, simulation, signing, and submission lifecycle. This page focuses on provider configuration and the network-specific boundaries around that lifecycle. ## Configure Solana providers Declare one `[solana.]` table for each cluster you want to configure. `rpc_url` is required. The remaining fields have defaults. ```toml providers.toml theme={null} [api-keys] helius_api_key = "{HELIUS_API_KEY}" [solana.mainnet-beta] kind = "rpc" rpc_url = "https://mainnet.helius-rpc.com/?api-key={HELIUS_API_KEY}" fallback_urls = ["https://api.mainnet-beta.solana.com"] retry_policy = "single_fallback" [solana.devnet] kind = "rpc" rpc_url = "https://api.devnet.solana.com" [solana.localnet] kind = "rpc" rpc_url = "http://localhost:8899" local = true ``` The fields have direct effects: * **`rpc_url`** selects the primary RPC for the cluster. It supports `{ENV_VAR}` placeholders. * **`fallback_urls`** supplies ordered alternatives. With the current `single_fallback` policy, Aomi tries only the first URL after a transient transport failure. * **`retry_policy`** should remain `single_fallback`. * **`local`** marks a developer endpoint. It defaults to `true` for `localnet` and `false` for the public clusters. * **`kind`** should remain `rpc`. Aomi resolves placeholders and canonicalizes cluster names when it loads the file. Missing environment variables, unknown clusters, and duplicate aliases are startup errors. For example, `[solana.mainnet]` and `[solana.mainnet-beta]` refer to the same cluster, so you cannot declare both. Pass a specific file with `--providers ` or set `PROVIDERS_TOML`. Without either option, Aomi searches for `providers.toml` from the current directory upward. ## Add or change a Solana cluster Use these steps to point Aomi at another provider: 1. Choose one of the recognized clusters: `mainnet-beta`, `devnet`, `testnet`, or `localnet`. 2. Add or update its `[solana.]` table. 3. Set `rpc_url` to the primary endpoint. Use an environment placeholder for any credential in the URL. 4. Add one `fallback_urls` entry if the cluster needs provider failover. 5. Restart the process that loads `providers.toml`. `providers.toml` can change the provider for a recognized cluster. It cannot define a fifth SVM network. Supporting another SVM network requires a new cluster implementation so parsing, wallet routing, guards, and transaction submission agree on its identity. When a cluster has no explicit table, Aomi resolves its RPC in this order: 1. The legacy `SOLANA__RPC_URL` environment variable. 2. A Helius URL derived from `HELIUS_API_KEY` for mainnet or devnet. 3. The public cluster default. A non-empty `rpc_url` in `[solana.]` always takes priority. A blank value falls through to the same resolution order instead of creating an unusable RPC client. ## Supported clusters | Wallet selector | MCP `chain_context.cluster` | Accepted provider section names | Public default | | --------------- | -------------------------------- | ----------------------------------------- | ------------------------------------- | | Solana | `solana:mainnet` | `mainnet`, `mainnet-beta`, `mainnet_beta` | `https://api.mainnet-beta.solana.com` | | Solana Devnet | `solana:devnet` | `dev`, `devnet` | `https://api.devnet.solana.com` | | Solana Testnet | `solana:testnet` | `test`, `testnet` | `https://api.testnet.solana.com` | | Localnet | Not available through hosted MCP | `local`, `localhost`, `localnet` | `http://localhost:8899` | Every wallet request carries a canonical cluster identifier. Aomi rejects an unknown label instead of silently routing the request to a different network. The hosted wallet selector and MCP endpoint expose mainnet, devnet, and testnet. Localnet remains available to a locally configured runtime. ## Stage a Solana transaction An App can stage Solana work in two forms: * **`svm_stage_ix`** accepts instructions composed by the App. Aomi can inspect each program ID and instruction discriminator before it creates the wallet request. * **`svm_stage_tx`** accepts a venue-built base64 transaction, such as a `VersionedTransaction` returned by a swap service. Solana and EVM pending transactions use separate identifiers. A selector such as `svm:tx-1` cannot resolve to an EVM request. ## Request kinds The request kind determines what the wallet does after review: | Kind | Wallet action | Result | | ---------------------- | ---------------------------------------------------- | ---------------------------------------------- | | `solana_sign` | Sign without submitting | Signed transaction bytes return to the runtime | | `solana_sign_message` | Sign raw Ed25519 message bytes | Signature returns for verification | | `solana_send` | Sign and submit through the cluster RPC | Confirmed transaction signature | | `solana_sign_and_send` | Prefer the wallet's combined sign-and-send operation | Transaction signature | Aomi accepts legacy and versioned Solana transactions. In the browser, a connected Solana wallet handles attended requests. In the CLI, `aomi tx sign` can use a local Solana keypair. ## Choose the broadcaster The staged transaction records who submits it. The model cannot change this choice after assembly: * **`wallet`** asks the connected wallet to sign and submit. This is the standard attended flow. * **`venue`** returns the signed bytes to the App's submit tool so the venue can broadcast them. * **`aomi`** lets the runtime submit through the configured cluster RPC after it verifies the signed bytes and expected wallet. Pending Solana transactions execute sequentially. A transaction that reaches `confirmed` remains committed even if a later transaction fails. Solana does not roll back an earlier transaction across a multi-transaction sequence. ## Guards A guarded App can restrict three parts of a Solana request: * **Programs.** Every instruction's `program_id` must be allowed. * **Instruction discriminators.** Each inspectable Anchor discriminator must be allowed. * **Clusters.** The request must name an allowed cluster. The guard fails closed when it cannot inspect required data. A venue-built transaction staged through `svm_stage_tx` cannot be checked against program and discriminator allowlists. Guarded Apps should compose instructions through `svm_stage_ix` when those checks are required. ## Simulation boundaries Aomi can simulate a staged Solana transaction against cloned accounts and programs, with cluster RPC simulation as a fallback. Solana simulation is a tool result rather than a universal wallet-request gate. Your wallet remains the final review surface for an attended request. Provider failover also has a narrow scope. Aomi retries the first fallback RPC only for a transport-class failure. A structured RPC error, invalid transaction, signing error, or decoding error returns immediately because a different endpoint should not change its meaning. ## Next Follow instruction assembly, simulation, signing, and submission. Configure EVM providers and understand fork simulation and broadcast routing. See how wallet policy controls who may sign on either virtual machine.
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