pub struct RefundMaybeWithDerivedMetadataBuilder<'a> {
refund: RefundContents,
secp_ctx: Option<&'a Secp256k1<secp256k1::All>>,
pub struct RefundMaybeWithDerivedMetadataBuilder<'a> {
refund: RefundContents,
secp_ctx: Option<&'a Secp256k1<secp256k1::All>>,