IB20.transferFromWithMemo

Signature

IB20.sol

function transferFromWithMemo(address from, address to, uint256 amount, bytes32 memo) external returns (bool);

Field	Value
Selector	`0x929c2539`
Canonical signature	`transferFromWithMemo(address,address,uint256,bytes32)`

Description

Same as transferFrom, plus emits Memo immediately after the standard Transfer event. A memo of bytes32(0) is permitted.

Parameters

Parameter	Description
`from`	Source address.
`to`	Destination address.
`amount`	Amount to transfer.
`memo`	Off-chain memo payload.

Returns

Always true on success.

Policy Interaction

TRANSFER_EXECUTOR_POLICY is checked against msg.sender on every call, including when msg.sender == from. Sender (from) and receiver (to) policies are also enforced. All three checks are bypassed during the factory bootstrap window; see IB20Factory.createB20.

TRANSFER_EXECUTOR_POLICY now applies even when msg.sender == from. Tokens that have configured a restrictive executor policy will block holder-initiated transfers unless the holder is explicitly authorized as an executor.

Revert Conditions

Revert	Condition
`ContractPaused(TRANSFER)`	The `TRANSFER` operation is paused.
`InvalidReceiver`	`to == address(0)`.
`InvalidSender`	`from == address(0)`.
`InsufficientAllowance`	The caller’s allowance from `from` is below `amount`.
`PolicyForbids(TRANSFER_EXECUTOR_POLICY, ...)`	`msg.sender` is not authorized by the executor policy.
`PolicyForbids(TRANSFER_SENDER_POLICY, ...)`	`from` is not authorized by the sender policy.
`PolicyForbids(TRANSFER_RECEIVER_POLICY, ...)`	`to` is not authorized by the receiver policy.
`InsufficientBalance`	`from`’s balance is below `amount`.

Example

Usage Example

IB20(target).transferFromWithMemo(from, to, amount, memo);

Specifications

Reference

Node Operators

Security

Signature

Description

Parameters

Returns

Policy Interaction

Revert Conditions

Example

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Signature

Description

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Example