Ed25519 Verify

Category: Asymmetric & Elliptic Curve · Node Type ID: asymmetric-ed25519-verify

Verifies Ed25519 signature (RFC 8032)

Overview

Verifies a 64-byte Ed25519 signature (RFC 8032 / FIPS 186-5) against the original message and the signer's 32-byte Ed25519 public key, emitting a boolean verdict on the Valid output port.

Uses a Judgement Error Profile so invalid signatures produce Valid = false as normal data unless Treat As Error is configured.

When to Use

Verifying Ed25519 signatures produced by Ed25519 Sign or RFC 8032 test vectors.

Parameter Configuration

Parameter (ID)	Type & Default	Visibility Condition	Description & Options
Treat As Error `errorOnValue`	`select` Default: `""` (empty)	Always visible	Judgement error reinterpretation: set to `false` (or `true`) to raise an error when `Valid` matches that value. `(empty)`: None (default; the result is plain data) `true`: true `false`: false
Error Code `errorCode`	`text` Default: `""` (empty) Supports Variable Reference (`$var`: `string`)	When `errorOnValue` is `true` or `false`	Custom error code when Treat As Error triggers.
Error Message `errorMessage`	`text` Default: `""` (empty) Supports Variable Reference (`$var`: `string`)	When `errorOnValue` is `true` or `false`	Custom error message when Treat As Error triggers.

Port I/O Specification

See Ports & Connections for general wiring rules, data type colors, and dynamic port creation.

Input Ports

Port Nature: Fixed Input Ports (3 total).

Port Name	Port ID	Data Type	Required	Visibility Condition	Description
`Public Key`	`publicKey`	`Bytes` (32B)	Required	Always visible	32-byte Ed25519 public key.
`Message`	`message`	`Bytes`	Required	Always visible	Original message bytes (`Uint8Array`).
`Signature`	`signature`	`Bytes` (64B)	Required	Always visible	64-byte Ed25519 signature ($R \parallel S$) to verify.

Output Ports

Port Nature: Fixed Output Ports (1 total).

Port Name	Port ID	Data Type	Visibility Condition	Description
`Valid`	`isValid`	`Bool`	Always visible	Boolean verification result (`true` if valid, `false` otherwise).

Error Cases

This node uses a Judgement Error Profile on its boolean output port isValid:

Default Behavior (Treat As Error = None): Verification or comparison mismatches do not raise a runtime error; instead, the node completes normally and emits false (or true) on isValid so downstream nodes or scripts can inspect the boolean result.
Reinterpretation as Error (Treat As Error = false or true): When the boolean verdict on isValid equals the configured errorOnValue setting, the engine transitions this node into an ERROR state using your custom Error Code and Error Message and halts downstream execution.

Examples

Verifying an Ed25519 Signature

Check a 64-byte Ed25519 signature against the 32-byte public key.

Connect Public Key, Message, and Signature to Ed25519 Verify; Valid outputs true.