diff --git a/Cargo.lock b/Cargo.lock
index 4267c9b3..11be5763 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -717,7 +717,7 @@ checksum = "955d28af4278de8121b7ebeb796b6a45735dc01436d898801014aced2773a3d6"
 
 [[package]]
 name = "sentry_protos"
-version = "0.64.0"
+version = "0.64.1"
 dependencies = [
  "prost",
  "prost-types",
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/billing_config.proto b/proto/sentry_protos/billing/v1/services/contract/v2/billing_config.proto
new file mode 100644
index 00000000..bc3fdabb
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/billing_config.proto
@@ -0,0 +1,43 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "sentry_protos/billing/v1/common/v1/sponsored_type.proto";
+import "sentry_protos/billing/v1/services/contract/v1/billing_config.proto";
+
+// Configuration for a sponsored contract. The presence of this message on a
+// BillingConfig indicates the contract is sponsored; its absence means it is
+// not.
+message SponsorshipConfig {
+  // Whether this sponsored Contract is eligible to start trials.
+  bool can_trial = 1;
+
+  // Whether this sponsored Contract can checkout.
+  bool can_checkout = 2;
+
+  sentry_protos.billing.v1.common.v1.SponsoredType sponsorship_type = 3;
+}
+
+message BillingConfig {
+  // The number-of-months interval the contract was signed under
+  // (1 = monthly, 12 = annual). Frozen for the life of the contract.
+  uint32 month_interval = 1;
+
+  // Whether the org is allowed to incur pay-as-you-go usage.
+  // Credit-card orgs always support payg; invoiced orgs that should
+  // support it are an explicit override.
+  bool supports_payg = 2;
+
+  // Whether this is a managed (sales-assisted) subscription rather than
+  // self-serve.
+  bool is_managed = 3;
+
+  // Whether the org has a soft cap: usage past reserved volume is allowed
+  // (and billed) instead of hard-stopping ingestion.
+  bool has_soft_cap = 4;
+
+  // Sponsorship configuration. Absent means the contract is not sponsored.
+  optional SponsorshipConfig sponsorship_config = 5;
+
+  sentry_protos.billing.v1.services.contract.v1.ChargeConfig charge_config = 6;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/contract.proto b/proto/sentry_protos/billing/v1/services/contract/v2/contract.proto
new file mode 100644
index 00000000..1d50ccdb
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/contract.proto
@@ -0,0 +1,15 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "sentry_protos/billing/v1/services/contract/v1/retention_config.proto";
+import "sentry_protos/billing/v1/services/contract/v2/billing_config.proto";
+import "sentry_protos/billing/v1/services/contract/v2/contract_metadata.proto";
+import "sentry_protos/billing/v1/services/contract/v2/pricing_config.proto";
+
+message Contract {
+  ContractMetadata metadata = 1;
+  BillingConfig billing_config = 2;
+  PricingConfig pricing_config = 3;
+  sentry_protos.billing.v1.services.contract.v1.RetentionConfig retention_config = 4;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/contract_metadata.proto b/proto/sentry_protos/billing/v1/services/contract/v2/contract_metadata.proto
new file mode 100644
index 00000000..07a823fe
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/contract_metadata.proto
@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "sentry_protos/billing/v1/services/contract/v1/contract_metadata.proto";
+
+message ContractMetadata {
+  uint64 id = 1;
+  uint64 organization_id = 2;
+  // The set of BillingRules that the BillingRulesEngine has to execute for this contract.
+  string ruleset_version = 3;
+  // Catch-all for overrides and information not covered above.
+  sentry_protos.billing.v1.services.contract.v1.MetadataOptions custom_options = 4;
+  string package_uid = 5;
+
+  optional uint64 previous_id = 6;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_create_contract.proto b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_create_contract.proto
new file mode 100644
index 00000000..dd6e9d2a
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_create_contract.proto
@@ -0,0 +1,53 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "sentry_protos/billing/v1/common/v1/address.proto";
+import "sentry_protos/billing/v1/common/v1/sponsored_type.proto";
+import "sentry_protos/billing/v1/services/contract/v1/billing_config.proto";
+import "sentry_protos/billing/v1/services/contract/v1/invoice.proto";
+import "sentry_protos/billing/v1/services/contract/v1/pricing_config.proto";
+
+message CreateContractRequest {
+  uint64 organization_id = 1;
+  string package_uid = 2;
+  repeated sentry_protos.billing.v1.services.contract.v1.UserConfig user_configs = 3;
+  repeated sentry_protos.billing.v1.services.contract.v1.InvoiceLineItem line_items = 4;
+  sentry_protos.billing.v1.common.v1.Address address = 5;
+  // The customer's chosen cadence. Must be one of the package's
+  // supported_month_intervals. If unset, defaults to the package's first
+  // supported interval.
+  uint32 month_interval = 6;
+
+  // How the contract is billed. If unset (BILLING_TYPE_UNSPECIFIED), the
+  // contract defaults to credit-card.
+  sentry_protos.billing.v1.services.contract.v1.BillingType billing_type = 7;
+
+  // Whether usage past reserved volume is allowed (and billed) instead of
+  // hard-stopping ingestion.
+  bool has_soft_cap = 8;
+
+  // The tax provider's reference for the tax document opened for this invoice.
+  // When set, the contract service records it on the created invoice as a
+  // pending tax transaction atomically with invoice creation. Unset means no
+  // tax document was opened.
+  optional string tax_transaction_code = 9;
+
+  // The sponsored type of the contract. If unset, then this is a non-sponsored
+  // contract.
+  optional sentry_protos.billing.v1.common.v1.SponsoredType sponsorship_type = 10;
+
+  // The customer's tax registration number (e.g. VAT ID) on file.
+  optional string tax_number = 11;
+
+  // Whether the tax provider placed this invoice under reverse charge.
+  bool is_reverse_charge = 12;
+}
+
+message CreateContractResponse {
+  uint64 id = 1;
+  uint64 invoice_id = 2;
+  string invoice_guid = 3;
+  bool needs_charge = 4;
+  uint64 amount_billed = 5;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_all_contracts_for_organization.proto b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_all_contracts_for_organization.proto
new file mode 100644
index 00000000..bea43b15
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_all_contracts_for_organization.proto
@@ -0,0 +1,13 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "sentry_protos/billing/v1/services/contract/v2/contract.proto";
+
+message GetAllContractsForOrganizationRequest {
+  uint64 organization_id = 1;
+}
+
+message GetAllContractsForOrganizationResponse {
+  repeated Contract contracts = 1;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_contract.proto b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_contract.proto
new file mode 100644
index 00000000..fb7887ea
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_contract.proto
@@ -0,0 +1,21 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "sentry_protos/billing/v1/date.proto";
+import "sentry_protos/billing/v1/services/contract/v2/contract.proto";
+
+message GetContractRequest {
+  uint64 organization_id = 1;
+
+  // If provided, returns the Contract active on this date. Otherwise, returns the current Contract.
+  sentry_protos.billing.v1.Date date = 2;
+}
+
+message GetSpecificContractRequest {
+  uint64 contract_id = 1;
+}
+
+message GetContractResponse {
+  Contract contract = 1;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_uninvoiced_contracts.proto b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_uninvoiced_contracts.proto
new file mode 100644
index 00000000..88e949b7
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/endpoint_get_uninvoiced_contracts.proto
@@ -0,0 +1,25 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "google/protobuf/timestamp.proto";
+
+message GetUninvoicedContractsRequest {
+  // Returns Contracts whose current billing period ends before this time and
+  // have not yet been invoiced for the current period.
+  google.protobuf.Timestamp current_ts = 1;
+
+  // Maximum number of contracts to return in the response. If more contracts
+  // match the request than this limit, the response will have truncated set
+  // to true.
+  uint32 max_items = 2;
+
+  optional uint32 offset = 3;
+}
+
+message GetUninvoicedContractsResponse {
+  // True if additional matching contracts existed beyond max_items and were
+  // not included in this response.
+  bool truncated = 1;
+  repeated uint64 contract_ids = 2;
+}
diff --git a/proto/sentry_protos/billing/v1/services/contract/v2/pricing_config.proto b/proto/sentry_protos/billing/v1/services/contract/v2/pricing_config.proto
new file mode 100644
index 00000000..08224b08
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/contract/v2/pricing_config.proto
@@ -0,0 +1,20 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.contract.v2;
+
+import "google/protobuf/timestamp.proto";
+import "sentry_protos/billing/v1/services/contract/v1/billing_config.proto";
+import "sentry_protos/billing/v1/services/contract/v1/pricing_config.proto";
+
+message PricingConfig {
+  // Determines when to reset quotas and charge the subscription price.
+  sentry_protos.billing.v1.services.contract.v1.Date billing_period_start_date = 1;
+  sentry_protos.billing.v1.services.contract.v1.Date billing_period_end_date = 2;
+
+  //Determines when the on demand period for invoicing the organization starts and ends, even for annual plans we bill ondemand monthly
+  sentry_protos.billing.v1.services.contract.v1.Date ondemand_period_start_date = 3;
+  sentry_protos.billing.v1.services.contract.v1.Date ondemand_period_end_date = 4;
+  optional google.protobuf.Timestamp usage_watermark_ts = 5;
+
+  repeated sentry_protos.billing.v1.services.contract.v1.UserConfig user_config = 6;
+}
diff --git a/proto/sentry_protos/billing/v1/services/invoicer/v2/endpoint_bill_contract_change.proto b/proto/sentry_protos/billing/v1/services/invoicer/v2/endpoint_bill_contract_change.proto
new file mode 100644
index 00000000..c2edbc14
--- /dev/null
+++ b/proto/sentry_protos/billing/v1/services/invoicer/v2/endpoint_bill_contract_change.proto
@@ -0,0 +1,29 @@
+syntax = "proto3";
+
+package sentry_protos.billing.v1.services.invoicer.v2;
+
+import "sentry_protos/billing/v1/common/v1/pending_change.proto";
+
+// Invoices an immediate mid-term contract change and rolls the contract over
+// now. The caller supplies the change to apply (target package/interval and the
+// caps taking effect now). The invoicer prices the prorated new-plan charge and
+// the credit for unused time on the current plan itself, settles accrued
+// pay-as-you-go usage at the current contract's rates, applies monetary grants
+// and sales tax, closes the current contract immediately, and opens the new
+// contract with the supplied change applied.
+message BillContractChangeRequest {
+  uint64 contract_id = 1;
+  // The change applied to the new contract: the target package/interval and the
+  // PAYG caps taking effect now. Reuses the PendingChange shape the rollover
+  // consumes, but here it applies immediately rather than at a period boundary,
+  // so the caller does not stage it in the pending-change store.
+  sentry_protos.billing.v1.common.v1.PendingChange change = 2;
+
+  // Whether the requested change should result in a new billing period.
+  bool start_new_term = 3;
+}
+
+message BillContractChangeResponse {
+  // The invoice that settles the change (and closes the previous contract).
+  uint64 invoice_id = 1;
+}
diff --git a/rust/src/_include.rs b/rust/src/_include.rs
index e7ec5d80..2c0cda89 100644
--- a/rust/src/_include.rs
+++ b/rust/src/_include.rs
@@ -33,6 +33,9 @@ pub mod sentry_protos {
                     pub mod v1 {
                         include!("sentry_protos.billing.v1.services.contract.v1.rs");
                     }
+                    pub mod v2 {
+                        include!("sentry_protos.billing.v1.services.contract.v2.rs");
+                    }
                 }
                 pub mod contract_budget_enforcer {
                     pub mod v1 {
@@ -53,6 +56,9 @@ pub mod sentry_protos {
                     pub mod v1 {
                         include!("sentry_protos.billing.v1.services.invoicer.v1.rs");
                     }
+                    pub mod v2 {
+                        include!("sentry_protos.billing.v1.services.invoicer.v2.rs");
+                    }
                 }
                 pub mod package {
                     pub mod v1 {
diff --git a/rust/src/sentry_protos.billing.v1.services.contract.v2.rs b/rust/src/sentry_protos.billing.v1.services.contract.v2.rs
new file mode 100644
index 00000000..108cb8e1
--- /dev/null
+++ b/rust/src/sentry_protos.billing.v1.services.contract.v2.rs
@@ -0,0 +1,195 @@
+// This file is @generated by prost-build.
+/// Configuration for a sponsored contract. The presence of this message on a
+/// BillingConfig indicates the contract is sponsored; its absence means it is
+/// not.
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct SponsorshipConfig {
+    /// Whether this sponsored Contract is eligible to start trials.
+    #[prost(bool, tag = "1")]
+    pub can_trial: bool,
+    /// Whether this sponsored Contract can checkout.
+    #[prost(bool, tag = "2")]
+    pub can_checkout: bool,
+    #[prost(enumeration = "super::super::super::common::v1::SponsoredType", tag = "3")]
+    pub sponsorship_type: i32,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct BillingConfig {
+    /// The number-of-months interval the contract was signed under
+    /// (1 = monthly, 12 = annual). Frozen for the life of the contract.
+    #[prost(uint32, tag = "1")]
+    pub month_interval: u32,
+    /// Whether the org is allowed to incur pay-as-you-go usage.
+    /// Credit-card orgs always support payg; invoiced orgs that should
+    /// support it are an explicit override.
+    #[prost(bool, tag = "2")]
+    pub supports_payg: bool,
+    /// Whether this is a managed (sales-assisted) subscription rather than
+    /// self-serve.
+    #[prost(bool, tag = "3")]
+    pub is_managed: bool,
+    /// Whether the org has a soft cap: usage past reserved volume is allowed
+    /// (and billed) instead of hard-stopping ingestion.
+    #[prost(bool, tag = "4")]
+    pub has_soft_cap: bool,
+    /// Sponsorship configuration. Absent means the contract is not sponsored.
+    #[prost(message, optional, tag = "5")]
+    pub sponsorship_config: ::core::option::Option<SponsorshipConfig>,
+    #[prost(message, optional, tag = "6")]
+    pub charge_config: ::core::option::Option<super::v1::ChargeConfig>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct ContractMetadata {
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    #[prost(uint64, tag = "2")]
+    pub organization_id: u64,
+    /// The set of BillingRules that the BillingRulesEngine has to execute for this contract.
+    #[prost(string, tag = "3")]
+    pub ruleset_version: ::prost::alloc::string::String,
+    /// Catch-all for overrides and information not covered above.
+    #[prost(message, optional, tag = "4")]
+    pub custom_options: ::core::option::Option<super::v1::MetadataOptions>,
+    #[prost(string, tag = "5")]
+    pub package_uid: ::prost::alloc::string::String,
+    #[prost(uint64, optional, tag = "6")]
+    pub previous_id: ::core::option::Option<u64>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct PricingConfig {
+    /// Determines when to reset quotas and charge the subscription price.
+    #[prost(message, optional, tag = "1")]
+    pub billing_period_start_date: ::core::option::Option<super::v1::Date>,
+    #[prost(message, optional, tag = "2")]
+    pub billing_period_end_date: ::core::option::Option<super::v1::Date>,
+    /// Determines when the on demand period for invoicing the organization starts and ends, even for annual plans we bill ondemand monthly
+    #[prost(message, optional, tag = "3")]
+    pub ondemand_period_start_date: ::core::option::Option<super::v1::Date>,
+    #[prost(message, optional, tag = "4")]
+    pub ondemand_period_end_date: ::core::option::Option<super::v1::Date>,
+    #[prost(message, optional, tag = "5")]
+    pub usage_watermark_ts: ::core::option::Option<::prost_types::Timestamp>,
+    #[prost(message, repeated, tag = "6")]
+    pub user_config: ::prost::alloc::vec::Vec<super::v1::UserConfig>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Contract {
+    #[prost(message, optional, tag = "1")]
+    pub metadata: ::core::option::Option<ContractMetadata>,
+    #[prost(message, optional, tag = "2")]
+    pub billing_config: ::core::option::Option<BillingConfig>,
+    #[prost(message, optional, tag = "3")]
+    pub pricing_config: ::core::option::Option<PricingConfig>,
+    #[prost(message, optional, tag = "4")]
+    pub retention_config: ::core::option::Option<super::v1::RetentionConfig>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct CreateContractRequest {
+    #[prost(uint64, tag = "1")]
+    pub organization_id: u64,
+    #[prost(string, tag = "2")]
+    pub package_uid: ::prost::alloc::string::String,
+    #[prost(message, repeated, tag = "3")]
+    pub user_configs: ::prost::alloc::vec::Vec<super::v1::UserConfig>,
+    #[prost(message, repeated, tag = "4")]
+    pub line_items: ::prost::alloc::vec::Vec<super::v1::InvoiceLineItem>,
+    #[prost(message, optional, tag = "5")]
+    pub address: ::core::option::Option<super::super::super::common::v1::Address>,
+    /// The customer's chosen cadence. Must be one of the package's
+    /// supported_month_intervals. If unset, defaults to the package's first
+    /// supported interval.
+    #[prost(uint32, tag = "6")]
+    pub month_interval: u32,
+    /// How the contract is billed. If unset (BILLING_TYPE_UNSPECIFIED), the
+    /// contract defaults to credit-card.
+    #[prost(enumeration = "super::v1::BillingType", tag = "7")]
+    pub billing_type: i32,
+    /// Whether usage past reserved volume is allowed (and billed) instead of
+    /// hard-stopping ingestion.
+    #[prost(bool, tag = "8")]
+    pub has_soft_cap: bool,
+    /// The tax provider's reference for the tax document opened for this invoice.
+    /// When set, the contract service records it on the created invoice as a
+    /// pending tax transaction atomically with invoice creation. Unset means no
+    /// tax document was opened.
+    #[prost(string, optional, tag = "9")]
+    pub tax_transaction_code: ::core::option::Option<::prost::alloc::string::String>,
+    /// The sponsored type of the contract. If unset, then this is a non-sponsored
+    /// contract.
+    #[prost(
+        enumeration = "super::super::super::common::v1::SponsoredType",
+        optional,
+        tag = "10"
+    )]
+    pub sponsorship_type: ::core::option::Option<i32>,
+    /// The customer's tax registration number (e.g. VAT ID) on file.
+    #[prost(string, optional, tag = "11")]
+    pub tax_number: ::core::option::Option<::prost::alloc::string::String>,
+    /// Whether the tax provider placed this invoice under reverse charge.
+    #[prost(bool, tag = "12")]
+    pub is_reverse_charge: bool,
+}
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct CreateContractResponse {
+    #[prost(uint64, tag = "1")]
+    pub id: u64,
+    #[prost(uint64, tag = "2")]
+    pub invoice_id: u64,
+    #[prost(string, tag = "3")]
+    pub invoice_guid: ::prost::alloc::string::String,
+    #[prost(bool, tag = "4")]
+    pub needs_charge: bool,
+    #[prost(uint64, tag = "5")]
+    pub amount_billed: u64,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetAllContractsForOrganizationRequest {
+    #[prost(uint64, tag = "1")]
+    pub organization_id: u64,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct GetAllContractsForOrganizationResponse {
+    #[prost(message, repeated, tag = "1")]
+    pub contracts: ::prost::alloc::vec::Vec<Contract>,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetContractRequest {
+    #[prost(uint64, tag = "1")]
+    pub organization_id: u64,
+    /// If provided, returns the Contract active on this date. Otherwise, returns the current Contract.
+    #[prost(message, optional, tag = "2")]
+    pub date: ::core::option::Option<super::super::super::Date>,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetSpecificContractRequest {
+    #[prost(uint64, tag = "1")]
+    pub contract_id: u64,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct GetContractResponse {
+    #[prost(message, optional, tag = "1")]
+    pub contract: ::core::option::Option<Contract>,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetUninvoicedContractsRequest {
+    /// Returns Contracts whose current billing period ends before this time and
+    /// have not yet been invoiced for the current period.
+    #[prost(message, optional, tag = "1")]
+    pub current_ts: ::core::option::Option<::prost_types::Timestamp>,
+    /// Maximum number of contracts to return in the response. If more contracts
+    /// match the request than this limit, the response will have truncated set
+    /// to true.
+    #[prost(uint32, tag = "2")]
+    pub max_items: u32,
+    #[prost(uint32, optional, tag = "3")]
+    pub offset: ::core::option::Option<u32>,
+}
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct GetUninvoicedContractsResponse {
+    /// True if additional matching contracts existed beyond max_items and were
+    /// not included in this response.
+    #[prost(bool, tag = "1")]
+    pub truncated: bool,
+    #[prost(uint64, repeated, tag = "2")]
+    pub contract_ids: ::prost::alloc::vec::Vec<u64>,
+}
diff --git a/rust/src/sentry_protos.billing.v1.services.invoicer.v2.rs b/rust/src/sentry_protos.billing.v1.services.invoicer.v2.rs
new file mode 100644
index 00000000..6adf1f38
--- /dev/null
+++ b/rust/src/sentry_protos.billing.v1.services.invoicer.v2.rs
@@ -0,0 +1,28 @@
+// This file is @generated by prost-build.
+/// Invoices an immediate mid-term contract change and rolls the contract over
+/// now. The caller supplies the change to apply (target package/interval and the
+/// caps taking effect now). The invoicer prices the prorated new-plan charge and
+/// the credit for unused time on the current plan itself, settles accrued
+/// pay-as-you-go usage at the current contract's rates, applies monetary grants
+/// and sales tax, closes the current contract immediately, and opens the new
+/// contract with the supplied change applied.
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct BillContractChangeRequest {
+    #[prost(uint64, tag = "1")]
+    pub contract_id: u64,
+    /// The change applied to the new contract: the target package/interval and the
+    /// PAYG caps taking effect now. Reuses the PendingChange shape the rollover
+    /// consumes, but here it applies immediately rather than at a period boundary,
+    /// so the caller does not stage it in the pending-change store.
+    #[prost(message, optional, tag = "2")]
+    pub change: ::core::option::Option<super::super::super::common::v1::PendingChange>,
+    /// Whether the requested change should result in a new billing period.
+    #[prost(bool, tag = "3")]
+    pub start_new_term: bool,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct BillContractChangeResponse {
+    /// The invoice that settles the change (and closes the previous contract).
+    #[prost(uint64, tag = "1")]
+    pub invoice_id: u64,
+}