> For the complete documentation index, see [llms.txt](https://developers.polymath.network/classic-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.polymath.network/classic-sdk/beta/external-modules/_procedures_approveerc20_.approveerc20.md). # ApproveErc20 Procedure to approve spending funds on an ERC20 token. If no token address is specified, it defaults to POLY ## Type parameters ▪ **ReturnType** ## Hierarchy * Procedure‹[ApproveErc20ProcedureArgs](broken://pages/-M-tw-cAZcAsJc106P8M)› ↳ **ApproveErc20** ## Index ### Constructors * [constructor](broken://pages/-M-tw-a2eG0e1oSUiy25#constructor) ### Properties * [args](broken://pages/-M-tw-a2eG0e1oSUiy25#protected-args) * [context](broken://pages/-M-tw-a2eG0e1oSUiy25#protected-context) * [type](broken://pages/-M-tw-a2eG0e1oSUiy25#type) ### Methods * [addProcedure](broken://pages/-M-tw-a2eG0e1oSUiy25#addprocedure) * [addSignatureRequest](broken://pages/-M-tw-a2eG0e1oSUiy25#addsignaturerequest) * [addTransaction](broken://pages/-M-tw-a2eG0e1oSUiy25#addtransaction) * [prepare](broken://pages/-M-tw-a2eG0e1oSUiy25#prepare) * [prepareTransactions](broken://pages/-M-tw-a2eG0e1oSUiy25#preparetransactions) ## Constructors ### constructor \+ **new ApproveErc20**(`args`: [ApproveErc20ProcedureArgs](broken://pages/-M-tw-cAZcAsJc106P8M), `context`: [Context](broken://pages/-M-tw-_Q7PZbtE8P8eVD)): [*ApproveErc20*](broken://pages/-M-tw-a2eG0e1oSUiy25) *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:40*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L40) **Parameters:** | Name | Type | | --------- | ---------------------------------------------------------------- | | `args` | [ApproveErc20ProcedureArgs](broken://pages/-M-tw-cAZcAsJc106P8M) | | `context` | [Context](broken://pages/-M-tw-_Q7PZbtE8P8eVD) | **Returns:** [*ApproveErc20*](broken://pages/-M-tw-a2eG0e1oSUiy25) ## Properties ### `Protected` args • **args**: [*ApproveErc20ProcedureArgs*](broken://pages/-M-tw-cAZcAsJc106P8M) *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:34*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L34) ### `Protected` context • **context**: [*Context*](broken://pages/-M-tw-_Q7PZbtE8P8eVD) *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:36*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L36) ### type • **type**: [*ProcedureType*](broken://pages/-M-tw-awanLJUxGQ6Ike) = ProcedureType.ApproveErc20 *Overrides void* *Defined in* [*src/procedures/ApproveErc20.ts:10*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/ApproveErc20.ts#L10) ## Methods ### addProcedure ▸ **addProcedure**<**A**, **R**>(`Proc`: [ProcedureClass](broken://pages/-M-tw-c9gj9AYLarSHLB)‹A, R›): *(Anonymous function)* *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:91*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L91) Appends a Procedure into the TransactionQueue's queue. This defines what will be run by the TransactionQueue when it is started. **Type parameters:** ▪ **A** ▪ **R**: *any* **Parameters:** | Name | Type | Description | | ------ | ----------------------------------------------------------- | ---------------------------------------------------------------- | | `Proc` | [ProcedureClass](broken://pages/-M-tw-c9gj9AYLarSHLB)‹A, R› | A Procedure that will be run in the Procedure's TransactionQueue | **Returns:** *(Anonymous function)* whichever value is returned by the Procedure ### addSignatureRequest ▸ **addSignatureRequest**<**A**>(`request`: [SignatureRequest](/classic-sdk/beta/external-modules/_types_index_.md#signaturerequest)‹A›): *(Anonymous function)* *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:179*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L179) Appends a signature request into the TransactionQueue's queue. This defines what will be run by the TransactionQueue when it is started. **Type parameters:** ▪ **A** **Parameters:** | Name | Type | Description | | --------- | ------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------ | | `request` | [SignatureRequest](/classic-sdk/beta/external-modules/_types_index_.md#signaturerequest)‹A› | A signature request that will be run in the Procedure's TransactionQueue | **Returns:** *(Anonymous function)* a PostTransactionResolver that resolves to the signed data ### addTransaction ▸ **addTransaction**<**A**, **R**, **V**>(`method`: [LowLevelMethod](/classic-sdk/beta/external-modules/_types_index_.md#lowlevelmethod)‹A› | [FutureLowLevelMethod](broken://pages/-M-tw-cUEz2WxGIRd4IU)‹V, A›, `__namedParameters`: object): *(Anonymous function)* *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:137*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L137) Appends a method or future method into the TransactionQueue's queue. This defines what will be run by the TransactionQueue when it is started. **Type parameters:** ▪ **A** ▪ **R**: *any\[]* ▪ **V**: *any* **Parameters:** ▪ **method**: [*LowLevelMethod*](/classic-sdk/beta/external-modules/_types_index_.md#lowlevelmethod)*‹A› |* [*FutureLowLevelMethod*](broken://pages/-M-tw-cUEz2WxGIRd4IU)*‹V, A›* A method (or future method) that will be run in the Procedure's TransactionQueue. A future method is a transaction that doesn't exist at prepare time (for example a transaction on a module that hasn't been attached but will be by the time the previous transactions are run) ▪`Default value` **\_\_namedParameters**: *object*= {} | Name | Type | Default | | ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------- | | `fees` | undefined \| [Fees](broken://pages/-M-tw-cRf8gW2vbD2nnc) | - | | `resolvers` | object | (\[] as unknown) as ResolverArray | | `tag` | undefined \| [Any](broken://pages/-M-tw-avmNLFQXnbxhC_#any) \| [GetTokens](broken://pages/-M-tw-avmNLFQXnbxhC_#gettokens) \| [ApproveErc20](broken://pages/-M-tw-avmNLFQXnbxhC_#approveerc20) \| [TransferErc20](broken://pages/-M-tw-avmNLFQXnbxhC_#transfererc20) \| [ReserveSecurityToken](broken://pages/-M-tw-avmNLFQXnbxhC_#reservesecuritytoken) \| [CreateSecurityToken](broken://pages/-M-tw-avmNLFQXnbxhC_#createsecuritytoken) \| [CreateCheckpoint](broken://pages/-M-tw-avmNLFQXnbxhC_#createcheckpoint) \| [CreateErc20DividendDistribution](broken://pages/-M-tw-avmNLFQXnbxhC_#createerc20dividenddistribution) \| [SetErc20TaxWithholding](broken://pages/-M-tw-avmNLFQXnbxhC_#seterc20taxwithholding) \| [SetEtherTaxWithholding](broken://pages/-M-tw-avmNLFQXnbxhC_#setethertaxwithholding) \| [SetDefaultExcluded](broken://pages/-M-tw-avmNLFQXnbxhC_#setdefaultexcluded) \| [EnableDividends](broken://pages/-M-tw-avmNLFQXnbxhC_#enabledividends) \| [EnableCappedSto](broken://pages/-M-tw-avmNLFQXnbxhC_#enablecappedsto) \| [EnableTieredSto](broken://pages/-M-tw-avmNLFQXnbxhC_#enabletieredsto) \| [EnableGeneralPermissionManager](broken://pages/-M-tw-avmNLFQXnbxhC_#enablegeneralpermissionmanager) \| [EnableGeneralTransferManager](broken://pages/-M-tw-avmNLFQXnbxhC_#enablegeneraltransfermanager) \| [EnableCountTransferManager](broken://pages/-M-tw-avmNLFQXnbxhC_#enablecounttransfermanager) \| [EnablePercentageTransferManager](broken://pages/-M-tw-avmNLFQXnbxhC_#enablepercentagetransfermanager) \| [DisableController](broken://pages/-M-tw-avmNLFQXnbxhC_#disablecontroller) \| [FreezeIssuance](broken://pages/-M-tw-avmNLFQXnbxhC_#freezeissuance) \| [DisableFeature](broken://pages/-M-tw-avmNLFQXnbxhC_#disablefeature) \| [ReclaimDividendFunds](broken://pages/-M-tw-avmNLFQXnbxhC_#reclaimdividendfunds) \| [WithdrawTaxWithholdings](broken://pages/-M-tw-avmNLFQXnbxhC_#withdrawtaxwithholdings) \| [PushDividendPayment](broken://pages/-M-tw-avmNLFQXnbxhC_#pushdividendpayment) \| [PullDividendPayment](broken://pages/-M-tw-avmNLFQXnbxhC_#pulldividendpayment) \| [SetDividendsWallet](broken://pages/-M-tw-avmNLFQXnbxhC_#setdividendswallet) \| [AddDelegate](broken://pages/-M-tw-avmNLFQXnbxhC_#adddelegate) \| [ChangePermission](broken://pages/-M-tw-avmNLFQXnbxhC_#changepermission) \| [ControllerTransfer](broken://pages/-M-tw-avmNLFQXnbxhC_#controllertransfer) \| [ControllerRedeem](broken://pages/-M-tw-avmNLFQXnbxhC_#controllerredeem) \| [PauseSto](broken://pages/-M-tw-avmNLFQXnbxhC_#pausesto) \| [UnpauseSto](broken://pages/-M-tw-avmNLFQXnbxhC_#unpausesto) \| [FinalizeSto](broken://pages/-M-tw-avmNLFQXnbxhC_#finalizesto) \| [SetController](broken://pages/-M-tw-avmNLFQXnbxhC_#setcontroller) \| [SetDocument](broken://pages/-M-tw-avmNLFQXnbxhC_#setdocument) \| [RemoveDocument](broken://pages/-M-tw-avmNLFQXnbxhC_#removedocument) \| [ModifyKycDataMulti](broken://pages/-M-tw-avmNLFQXnbxhC_#modifykycdatamulti) \| [ModifyInvestorFlagMulti](broken://pages/-M-tw-avmNLFQXnbxhC_#modifyinvestorflagmulti) \| [IssueMulti](broken://pages/-M-tw-avmNLFQXnbxhC_#issuemulti) \| [AllowPreMinting](broken://pages/-M-tw-avmNLFQXnbxhC_#allowpreminting) \| [RevokePreMinting](broken://pages/-M-tw-avmNLFQXnbxhC_#revokepreminting) \| [ChangeAllowBeneficialInvestments](broken://pages/-M-tw-avmNLFQXnbxhC_#changeallowbeneficialinvestments) \| [ModifyTimes](broken://pages/-M-tw-avmNLFQXnbxhC_#modifytimes) \| [ModifyFunding](broken://pages/-M-tw-avmNLFQXnbxhC_#modifyfunding) \| [ModifyAddresses](broken://pages/-M-tw-avmNLFQXnbxhC_#modifyaddresses) \| [ModifyTiers](broken://pages/-M-tw-avmNLFQXnbxhC_#modifytiers) \| [ModifyLimits](broken://pages/-M-tw-avmNLFQXnbxhC_#modifylimits) \| [ModifyOracles](broken://pages/-M-tw-avmNLFQXnbxhC_#modifyoracles) \| [BuyWithScRateLimited](broken://pages/-M-tw-avmNLFQXnbxhC_#buywithscratelimited) \| [BuyWithPolyRateLimited](broken://pages/-M-tw-avmNLFQXnbxhC_#buywithpolyratelimited) \| [BuyWithEthRateLimited](broken://pages/-M-tw-avmNLFQXnbxhC_#buywithethratelimited) \| [BuyTokens](broken://pages/-M-tw-avmNLFQXnbxhC_#buytokens) \| [BuyTokensWithPoly](broken://pages/-M-tw-avmNLFQXnbxhC_#buytokenswithpoly) \| [ChangeHolderCount](broken://pages/-M-tw-avmNLFQXnbxhC_#changeholdercount) \| [ChangeHolderPercentage](broken://pages/-M-tw-avmNLFQXnbxhC_#changeholderpercentage) \| [ModifyWhitelistMulti](broken://pages/-M-tw-avmNLFQXnbxhC_#modifywhitelistmulti) \| [SetAllowPrimaryIssuance](broken://pages/-M-tw-avmNLFQXnbxhC_#setallowprimaryissuance) \| [TransferSecurityTokens](broken://pages/-M-tw-avmNLFQXnbxhC_#transfersecuritytokens) \| [UnfreezeTransfers](broken://pages/-M-tw-avmNLFQXnbxhC_#unfreezetransfers) \| [FreezeTransfers](broken://pages/-M-tw-avmNLFQXnbxhC_#freezetransfers) \| [Signature](broken://pages/-M-tw-avmNLFQXnbxhC_#signature) \| [TransferReservationOwnership](broken://pages/-M-tw-avmNLFQXnbxhC_#transferreservationownership) \| [TransferOwnership](broken://pages/-M-tw-avmNLFQXnbxhC_#transferownership) | - | **Returns:** *(Anonymous function)* a PostTransactionResolver that resolves to the value returned by the resolver function, or undefined if no resolver function was passed ### prepare ▸ **prepare**(): *Promise‹*[*TransactionQueue*](broken://pages/-M-tw-_ttRjEt_eA5M8H)*‹Args, ReturnType››* *Inherited from void* *Defined in* [*src/procedures/Procedure.ts:52*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/Procedure.ts#L52) Mandatory method that builds a list of transactions that will be run **Returns:** *Promise‹*[*TransactionQueue*](broken://pages/-M-tw-_ttRjEt_eA5M8H)*‹Args, ReturnType››* ### prepareTransactions ▸ **prepareTransactions**(): *Promise‹void›* *Overrides void* *Defined in* [*src/procedures/ApproveErc20.ts:21*](https://github.com/PolymathNetwork/polymath-sdk/blob/550676f/src/procedures/ApproveErc20.ts#L21) Approve spend of an ERC20 token by another wallet. The token in question defaults to POLY if no address is supplied Note that if the amount has already been approved, the spending approval transaction will not be added to the queue and the procedure will return Note that the procedure will fail if the owner's token balance is less than the amount being approved. The only exception to this is when approving a POLY spend on a testnet. If that is the case, an extra transaction will be submitted to request the missing amount of tokens from the faucet **Returns:** *Promise‹void›*