Transaction meta is not exposed on SorobanEvent

[esteblock]

Summary: The SDK needs to expose rpc.Api.TransactionInfo. This is the only way to obtain resultMetaXdr: xdr.TransactionMeta;, which is necessary for retrieving the result of a transaction.

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When a transaction emits a Soroban Event, the Subql SDK only exposes a SorobanEvent type:

subql-stellar/packages/types/src/stellar/interfaces.ts

Lines 43 to 47 in b794f8a

	export type SorobanEvent = Omit<SorobanRpcEventResponse, 'ledger'> & {
	ledger: StellarBlock | null;
	transaction: StellarTransaction | null;
	operation: StellarOperation | null;
	};

export type StellarTransaction = Omit<
  Horizon.ServerApi.TransactionRecord,
  'effects' | 'ledger' | 'operations' | 'precedes' | 'self' | 'succeeds'
> & {
  effects: StellarEffect[];
  ledger: StellarBlock | null;
  operations: StellarOperation[];
  events: SorobanEvent[];
};

The SorobanEvent only includes a Horizon API, not a Stellar RPC.

From
https://developers.stellar.org/docs/data/horizon/api-reference/resources/transactions/object
we can see that the transaction meta transaction_meta_xdr can only be obtained from a Stellar RPC Transaction object.

The only rpc.Api exposed in the Subql SDK is the export type SorobanRpcEventResponse = rpc.Api.EventResponse;, which is insufficient.

We need to expose rpc.Api.TransactionInfo:

https://github.com/stellar/js-stellar-sdk/blob/38115a16ed3fbc5d868ae8b1ab3042cf8a0c3399/src/rpc/api.ts#L151

This is the only way we can retrieve the resultMetaXdr object, which is required to understand the results of a specific transaction.