@gala-chain/api ∙ API

---

API > DryRunDto

Class: DryRunDto

Contents

• Description
• Remarks
• Extends
• Constructors
• new DryRunDto()
• Properties
• callerPublicKey
• dto
• method
• prefix
• signature
• signerAddress
• signerPublicKey
• signing
• uniqueKey
• Methods
• isSignatureValid()
• serialize()
• sign()
• signed()
• validate()
• validateOrReject()
• deserialize()

Description

Input for the DryRun chaincode method defined on the GalaContract class. Use a DryRunDto and the DryRun chaincode method to simulate the execution of a chaincode contract method. The results of the DryRun will not be written chain. Instead, the Read/Write set that would have resulted from the transaction will be returned to the consuming client for analysis.

Remarks

Authorization is not checked for DryRun execution. This allows application, administrative, game server identities etc. to simulate a transaction result without prompting the end user to sign the input first. This helps avoid replay attacks (as the unique id would not be written to chain in a DryRun) and also allows applications to present certain outcomes to the end user before they decide to sign and authorize the transaction.

Example use case: Executing a DryRun on a given method, and then processing the results for FeeChannelPaymentReceipt or FeeUserPaymentReceipt objects can yield the exepcted/estimated fee prior to executing a transaction. The estimated fee can then be presented to an end user for them to decide whether or not they want to authorize the transaction.

Extends

• ChainCallDTO

Constructors

new DryRunDto()

new DryRunDto(): DryRunDto

Inherited from

ChainCallDTO.constructor

Properties

callerPublicKey

readonly callerPublicKey: string

Description

The identity used for the transaction simulation.

Source

chain-api/src/types/dtos.ts:337

---

dto

dto?: ChainCallDTO

Description

A input to be used for the DryRun execution. For example, if the method to be DryRun is TransferToken, then a TransferTokenDto should be provided here.

Source

chain-api/src/types/dtos.ts:349

---

method

readonly method: string

Description

The contract method intended for DryRun execution.

Example

"TransferToken"

Source

chain-api/src/types/dtos.ts:329

---

prefix

prefix?: string

Inherited from

ChainCallDTO.prefix

Source

chain-api/src/types/dtos.ts:159

---

signature

signature?: string

Inherited from

ChainCallDTO.signature

Source

chain-api/src/types/dtos.ts:150

---

signerAddress

signerAddress?: string

Inherited from

ChainCallDTO.signerAddress

Source

chain-api/src/types/dtos.ts:166

---

signerPublicKey

signerPublicKey?: string

Inherited from

ChainCallDTO.signerPublicKey

Source

chain-api/src/types/dtos.ts:173

---

signing

signing?: SigningScheme

Inherited from

ChainCallDTO.signing

Source

chain-api/src/types/dtos.ts:183

---

uniqueKey

uniqueKey?: string

Inherited from

ChainCallDTO.uniqueKey

Source

chain-api/src/types/dtos.ts:140

Methods

isSignatureValid()

isSignatureValid(publicKey): boolean

Parameters

▪ publicKey: string

Inherited from

ChainCallDTO.isSignatureValid

Source

chain-api/src/types/dtos.ts:257

---

serialize()

serialize(): string

Returns

string

Inherited from

ChainCallDTO.serialize

Description

Serialze this object to string in a determinsitic fashion. See Hyperledger Fabric's documentation on JSON Determinism for more details.

Source

chain-api/src/types/dtos.ts:207

---

sign()

sign(privateKey, useDer): void

Parameters

▪ privateKey: string

▪ useDer: boolean= false

Inherited from

ChainCallDTO.sign

Source

chain-api/src/types/dtos.ts:235

---

signed()

signed(privateKey, useDer): DryRunDto

Creates a signed copy of current object.

Parameters

▪ privateKey: string

▪ useDer: boolean= false

Inherited from

ChainCallDTO.signed

Source

chain-api/src/types/dtos.ts:251

---

validate()

validate(): Promise\<ValidationError[]>

Inherited from

ChainCallDTO.validate

Source

chain-api/src/types/dtos.ts:185

---

validateOrReject()

validateOrReject(): Promise\<void>

Inherited from

ChainCallDTO.validateOrReject

Source

chain-api/src/types/dtos.ts:189

---

deserialize()

static deserialize\<T>(constructor, object): T

Type parameters

▪ T

Parameters

▪ constructor: ClassConstructor\<Inferred\<T, ChainCallDTO>>

ClassConstructor that extends ChainCallDTO

▪ object: string | Record\<string, unknown> | Record\<string, unknown>[]

serialized string or plain object to be instantiated via the provided ClassConstructor

Returns

An instantiated class created with the provided ClassConstructor

Inherited from

ChainCallDTO.deserialize

Description

Instantiate a class instance from a serialized object using the provided ClassConstructor.

Source

chain-api/src/types/dtos.ts:228