extensions/erc20approvalgassponsor

type Erc20ApprovalFacilitatorExtension struct {
	Signer Erc20ApprovalGasSponsoringSigner
	// Optional network-aware signer resolver. When provided, this takes precedence
	// over Signer and allows different settlement signers per network.
	SignerForNetwork func(network string) Erc20ApprovalGasSponsoringSigner
}

type Erc20ApprovalGasSponsoringSigner interface {
	evm.FacilitatorEvmSigner
	SendTransactions(ctx context.Context, transactions []TransactionRequest) ([]string, error)
}

type Erc20ApprovalGasSponsoringSimulator interface {
	Erc20ApprovalGasSponsoringSigner
	SimulateTransactions(ctx context.Context, transactions []TransactionRequest) (bool, error)
}

type Extension struct {
	Info   interface{}            `json:"info"`
	Schema map[string]interface{} `json:"schema"`
}

type Info struct {
	// From is the address of the sender (token owner).
	From string `json:"from"`
	// Asset is the address of the ERC-20 token contract.
	Asset string `json:"asset"`
	// Spender is the address being approved (Canonical Permit2).
	Spender string `json:"spender"`
	// Amount is the approval amount (uint256 as decimal string). Typically MaxUint256.
	Amount string `json:"amount"`
	// SignedTransaction is the RLP-encoded signed approve transaction as a hex string (0x-prefixed).
	SignedTransaction string `json:"signedTransaction"`
	// Version is the schema version identifier.
	Version string `json:"version"`
}

type ServerInfo struct {
	Description string `json:"description"`
	Version     string `json:"version"`
}

type TransactionRequest struct {
	// Serialized is a pre-signed raw transaction hex (0x-prefixed).
	// When non-empty, the signer broadcasts it as-is via sendRawTransaction.
	Serialized string
	// Call is an unsigned contract write for the signer to sign and execute.
	// Used when Serialized is empty.
	Call *WriteContractCall
}

type WriteContractCall struct {
	Address  string
	ABI      []byte
	Function string
	Args     []interface{}
	// DataSuffix is appended to the ABI-encoded calldata when non-empty
	DataSuffix []byte
}