@solana/kit · General

Solana error #12

FAILED_TO_SEND_TRANSACTIONS

Appears as Solana error #12; Decode this error by running `npx @solana/errors decode -- 12 '…'`

Message

Failed to send transactions$causeMessages

Placeholders (causeMessages) are filled from the error’s context. Paste the base64 argument below to see the real values.

What it means

Early, uncategorised errors: blockhash expiry, nonces, number parsing, and failures to send or sign.

What to do

  • Most of these come from transaction lifecycle helpers. Check the blockhash or nonce you built the transaction with, then the signer and RPC you used to send it.
@solana/errors 8.4.0 source ↗All General codes →

Decode it locally instead

npx @solana/errors decode -- 12 '<base64 context>'

In development, import from @solana/kit as usual and the full message is thrown. In production the message is stripped to keep bundles small; the error object still carries error.context with the same values this page decodes, and isSolanaError(err, SOLANA_ERROR__FAILED_TO_SEND_TRANSACTIONS) lets you branch on it.

Other General codes

1BLOCK_HEIGHT_EXCEEDED2INVALID_NONCE3NONCE_ACCOUNT_NOT_FOUND4BLOCKHASH_STRING_LENGTH_OUT_OF_RANGE5INVALID_BLOCKHASH_BYTE_LENGTH6LAMPORTS_OUT_OF_RANGE7MALFORMED_BIGINT_STRING8MALFORMED_NUMBER_STRING

Decode another error

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