docs: update keychain TypeScript signers

[amilz]

Problem

The keychain TypeScript docs used the deprecated class-based signer constructors and lacked a first-class example for the Kit client plugin.

Changes

• Migrate backend examples to the create*Signer factory functions (createVaultSigner, createAwsKmsSigner, createPrivySigner, createTurnkeySigner, createFireblocksSigner). createFireblocksSigner is async and inits internally, so the manual .init() call is removed.
• Add a "Using with a Kit Client (keychainSigner plugin)" section covering keychainSigner/keychainPayer/keychainIdentity from @solana/keychain-kit-plugin, plus the @solana/kit-plugin-signer path for an existing signer.
• Add @solana/keychain-utila and @solana/keychain-kit-plugin to the install list.

Scope is /en/ only; other locales regenerate on merge.

Closes TOO-540

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
solana-com-docs	Ready	Preview, Comment	Jun 18, 2026 4:16pm

5 Skipped Deployments

Project	Deployment	Actions	Updated (UTC)
solana-com	Skipped		Jun 18, 2026 4:16pm
solana-com-accelerate	Skipped		Jun 18, 2026 4:16pm
solana-com-breakpoint-2	Skipped		Jun 18, 2026 4:16pm
solana-com-media	Skipped		Jun 18, 2026 4:16pm
templates	Skipped		Jun 18, 2026 4:16pm

[greptile-apps]

Greptile Summary

This PR updates the Keychain TypeScript docs by migrating all backend examples from deprecated class-based constructors (new VaultSigner(), etc.) to the recommended create*Signer factory functions, and adds a new section documenting the @solana/keychain-kit-plugin integration (keychainSigner / keychainPayer / keychainIdentity).

• All five backend examples (vault, aws-kms, privy, turnkey, fireblocks) are updated to factory functions; createFireblocksSigner is correctly shown as async, removing the now-unnecessary .init() call.
• A new "Using with a Kit Client" section demonstrates keychainSigner, keychainPayer, keychainIdentity, and the @solana/kit-plugin-signer path; the installation block gains pnpm add @solana/keychain-kit-plugin.
• The third code snippet in the new section omits import { createClient } from "@solana/kit", which would cause a runtime/compile error for anyone copying the block directly.

Confidence Score: 4/5

Safe to merge after fixing one copy-paste error in a code snippet.

The third code block in the new Kit client section calls createClient() without importing it, which would produce an immediate compile or runtime error for any developer copying that snippet. Everything else — factory function migrations, Fireblocks async init removal, install instructions — looks correct and consistent with the rest of the file.

apps/docs/content/docs/en/tools/keychain/getting-started/typescript.mdx — specifically the 'Already have a SolanaSigner?' code block around line 152.

Important Files Changed

Filename	Overview
apps/docs/content/docs/en/tools/keychain/getting-started/typescript.mdx	Migrates class-based signer constructors to factory functions and adds a new Kit client plugin section; the "Already have a SolanaSigner?" code example is missing a createClient import, causing a copy-paste error.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[Developer wants a signer] --> B{Kit client needed?}
    B -- No --> C[createKeychainSigner / create*Signer]
    B -- Yes --> D{New signer or existing?}
    D -- New --> E["keychainSigner / keychainPayer / keychainIdentity\n(@solana/keychain-kit-plugin)"]
    D -- Existing --> F["signer(mySigner)\n(@solana/kit-plugin-signer)"]
    C --> G[SolanaSigner]
    E --> H["createClient().use(plugin)"]
    F --> H
    G --> I[signTransactionMessageWithSigners]
    H --> J[client.payer / client.identity]

Loading

%%{init: {'theme': 'base', 'themeVariables': {"darkMode": true, "background": "#0d1117", "primaryColor": "#21262d", "primaryTextColor": "#e6edf3", "primaryBorderColor": "#8b949e", "lineColor": "#8b949e", "textColor": "#e6edf3", "edgeLabelBackground": "#161b22", "actorBkg": "#21262d", "actorBorder": "#8b949e", "actorTextColor": "#e6edf3", "actorLineColor": "#8b949e", "signalColor": "#8b949e", "signalTextColor": "#e6edf3", "noteBkgColor": "#373320", "noteBorderColor": "#d4a72c", "noteTextColor": "#f0e6c0", "labelBoxBkgColor": "#21262d", "labelBoxBorderColor": "#8b949e", "labelTextColor": "#e6edf3", "loopTextColor": "#e6edf3", "activationBkgColor": "#30363d", "activationBorderColor": "#8b949e"}}}%%
flowchart TD
    A[Developer wants a signer] --> B{Kit client needed?}
    B -- No --> C[createKeychainSigner / create*Signer]
    B -- Yes --> D{New signer or existing?}
    D -- New --> E["keychainSigner / keychainPayer / keychainIdentity\n(@solana/keychain-kit-plugin)"]
    D -- Existing --> F["signer(mySigner)\n(@solana/kit-plugin-signer)"]
    C --> G[SolanaSigner]
    E --> H["createClient().use(plugin)"]
    F --> H
    G --> I[signTransactionMessageWithSigners]
    H --> J[client.payer / client.identity]

Loading

_{Reviews (2): Last reviewed commit: "docs: add @solana/kit-plugin-signer inst..." | Re-trigger Greptile}

[linear]

TOO-540