Function createUpdateMetadataFieldInstruction

createUpdateMetadataFieldInstruction(
    mintInterface: MintInterface,
    authority: PublicKey,
    payer: PublicKey,
    validityProof: ValidityProofWithContext | null,
    fieldType: "symbol" | "name" | "uri" | "custom",
    value: string,
    customKey?: string,
    extensionIndex?: number,
    maxTopUp?: number,
): TransactionInstruction
Create instruction for updating a light mint's metadata field.

Output queue is automatically derived from mintInterface.merkleContext.treeInfo (preferring nextTreeInfo.queue if available for rollover support).
Parameters
- mintInterface: MintInterface
  MintInterface from getMintInterface() - must have merkleContext and tokenMetadata
- authority: PublicKey
  Metadata update authority public key (must sign)
- payer: PublicKey
  Fee payer public key
- validityProof: ValidityProofWithContext | null
  Validity proof for the light mint (null for decompressed light mints)
- fieldType: "symbol" | "name" | "uri" | "custom"
  Field to update: 'name', 'symbol', 'uri', or 'custom'
- value: string
  New value for the field
- OptionalcustomKey: string
  Custom key name (required if fieldType is 'custom')
- extensionIndex: number = 0
  Extension index (default: 0)
- OptionalmaxTopUp: number
  Optional cap on rent top-up (units of 1k lamports; default no cap)
Returns TransactionInstruction
- Defined in v3/instructions/update-metadata.ts:264