[Bug] Indexing Error because of 2D BigInt Arrays

Bug report

Hello, thanks in advance for the support.

I have an indexing error when i try to sync my subgraph to subgraph studio (look at the picture)

This error is somehow related to a problem with graph-ts that can't interpret the 2D Array of BigInts inside of the following event :

- event: Exchange(indexed address,indexed address,address[11],uint256[5][5],address[5],uint256,uint256)
          handler: handleExchange

This event is specific to the following Curve Contract : 0x16c6521dff6bab339122a0fe25a9116693265353
This 2D Array is crucial to decode and analyse the data from this bridge, so i can't delete it from my subgraph or do it another way.
Just below also the typescript code that initialize this entity and the entity itself :

import { Exchange as ExchangeEvent } from "../generated/CurveRouter/CurveRouter"
import { Exchange } from "../generated/schema"
import { Bytes } from "@graphprotocol/graph-ts"

export function handleExchange(event: ExchangeEvent): void {
  let entity = new Exchange(
    event.transaction.hash.concatI32(event.logIndex.toI32())
  )
  entity.sender = event.params.sender
  entity.receiver = event.params.receiver
  entity.swap_params = event.params.swap_params
  entity.route = event.params.route.map<Bytes>((address) => address as Bytes);
  entity.pools = event.params.pools.map<Bytes>((address) => address as Bytes);
  entity.in_amount = event.params.in_amount
  entity.out_amount = event.params.out_amount

  entity.blockNumber = event.block.number
  entity.blockTimestamp = event.block.timestamp
  entity.transactionHash = event.transaction.hash

  entity.save()
}

type Exchange @entity(immutable: true) {
  id: Bytes!
  sender: Bytes! # address
  receiver: Bytes! # address
  route: [Bytes!]! # address[11]
  swap_params: [[BigInt!]!]! # uint256[5][5]
  pools: [Bytes!]! # address[5]
  in_amount: BigInt! # uint256
  out_amount: BigInt! # uint256
  blockNumber: BigInt!
  blockTimestamp: BigInt!
  transactionHash: Bytes!
}

Relevant log output

Error: failed to process trigger: block #20268517 (0x21c0…fc31), transaction 4035dca11776d0fd55d48120ff116936975f7709a59e9c9843b2a7d2c55b14a0: error while executing at wasm backtrace: 0: 0x3c9e - <unknown>!src/curve-router/handleExchange: Entity Exchange[0x4035dca11776d0fd55d48120ff116936975f7709a59e9c9843b2a7d2c55b14a057000000]: field `swap_params` is of type [[BigInt!]!], but the value `[[0, 2, 1, 30, 3], [1, 0, 1, 10, 2], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]]` contains a [BigInt] at index 0: Entity Exchange[0x4035dca11776d0fd55d48120ff116936975f7709a59e9c9843b2a7d2c55b14a057000000]: field `swap_params` is of type [[BigInt!]!], but the value `[[0, 2, 1, 30, 3], [1, 0, 1, 10, 2], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0]]` contains a [BigInt] at index 0

To view more details about this indexing error, please view the documentation.

IPFS hash

QmSk6FugeKhGvzGCtqXxnG1SWgpc7rna3VQ6U8F3ooPTfe

Subgraph name or link to explorer

No response

Some information to help us out

• Tick this box if this bug is caused by a regression found in the latest release.
• Tick this box if this bug is specific to the hosted service.
• I have searched the issue tracker to make sure this issue is not a duplicate.

OS information

macOS

Comienza con el punto de entrada handleExchange que falla, mostrado en el backtrace de WASM, y con las definiciones de eventos y entidades de graph-ts del informe. Reproduce la asignación uint256[5][5] utilizando los datos del evento proporcionados y, después, sigue cómo se validan los arrays BigInt anidados durante las escrituras de entidades. Se considera completado cuando este evento se indexa correctamente mientras se conserva swap_params para la entidad Exchange.