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@faremeter/payment-solana

v0.21.0

Published

Solana payment scheme implementations for x402 protocol (SPL token transfers)

Vulnerabilities

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Links

Maintainers

faremeter-distfaremeter-distalexanderguyalexanderguy

Keywords

faremetertypescriptsdkapix402ai

Readme

@faremeter/payment-solana

Solana payment scheme implementations for the x402 protocol, supporting SPL token transfers.

Installation

pnpm install @faremeter/payment-solana

Features

  • SPL token payments (USDC, etc.)
  • Devnet, testnet, and mainnet support
  • Automatic fee payer handling
  • Transaction verification
  • Works with any SPL token

API Reference

Functions

isAccountNotFoundError

Checks if an error indicates a token account was not found.

This handles various error formats from Solana RPC responses, including TokenAccountNotFoundError and AccountNotFoundError names, as well as message-based detection.

| Function | Type | | ------------------------ | ------------------------- | | isAccountNotFoundError | (e: unknown) => boolean |

Parameters:

  • e: - The error to check

Returns:

True if the error indicates the account does not exist

getTokenBalance

Retrieves the SPL token balance for an account.

Looks up the associated token account (ATA) for the given wallet and mint, then fetches the token balance. Returns null if the account does not exist.

| Function | Type | | ----------------- | ------------------------------------------------------------------------------------ | | getTokenBalance | (args: GetTokenBalanceArgs) => Promise<{ amount: bigint; decimals: any; } or null> |

Parameters:

  • args: - The asset, account, and RPC client

Returns:

The balance amount and decimals, or null if the account does not exist

Constants

TOKEN_2022_PROGRAM_ADDRESS

| Constant | Type | | ---------------------------- | -------------------------------------------------------- | | TOKEN_2022_PROGRAM_ADDRESS | Address<"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb"> |

Interfaces

GetTokenBalanceArgs

Arguments for retrieving an SPL token balance.

| Property | Type | Description | | -------------- | -------------------------------- | ------------------------------------------------------------- | | asset | Base58Address | The SPL token mint address | | account | Base58Address | The wallet address to check the balance for | | rpcClient | Rpc<GetTokenAccountBalanceApi> | Solana RPC client with token balance API support | | tokenProgram | Address or undefined | The token program address (defaults to TOKEN_PROGRAM_ADDRESS) |

Related Packages

License

LGPL-3.0-only