allowed_breaking_change.patch

diff --git a/src/internet_identity/internet_identity.did b/src/internet_identity/internet_identity.did
index 500ef4d6..eb75b075 100644
--- a/src/internet_identity/internet_identity.did
+++ b/src/internet_identity/internet_identity.did
@@ -435,6 +435,17 @@ type IdentityInfoError = variant {
     InternalCanisterError: text;
 };
 
+
+
+type IdentityRegisterError = variant {
+    // No more registrations are possible in this instance of the II service canister.
+    CanisterFull;
+    // The captcha check was not successful.
+    BadCaptcha;
+    // The metadata of the provided authentication method contains invalid entries.
+    InvalidMetadata: text;
+};
+
 type AuthnMethodAddError = variant {
     InvalidMetadata: text;
 };
@@ -521,72 +532,6 @@ type SignedIdAlias = record {
     id_dapp : principal;
 };
 
-type IdRegNextStepResult = record {
-    // The next step in the registration flow
-    next_step: RegistrationFlowNextStep;
-};
-
-type IdRegStartError = variant {
-    // The method was called anonymously, which is not supported.
-    InvalidCaller;
-    // Too many registrations. Please try again later.
-    RateLimitExceeded;
-    // A registration flow is already in progress.
-    AlreadyInProgress;
-};
-
-// The next step in the registration flow:
-// - CheckCaptcha: supply the solution to the captcha using `check_captcha`
-// - Finish: finish the registration using `identity_registration_finish`
-type RegistrationFlowNextStep = variant {
-    // Supply the captcha solution using check_captcha
-    CheckCaptcha: record {
-        captcha_png_base64: text;
-    };
-    // Finish the registration using identity_registration_finish
-    Finish;
-};
-
-type CheckCaptchaArg = record {
-    solution : text;
-};
-
-type CheckCaptchaError = variant {
-    // The supplied solution was wrong. Try again with the new captcha.
-    WrongSolution: record {
-        new_captcha_png_base64: text;
-    };
-    // This call is unexpected, see next_step.
-    UnexpectedCall: record {
-        next_step: RegistrationFlowNextStep;
-    };
-    // No registration flow ongoing for the caller.
-    NoRegistrationFlow;
-};
-
-type IdRegFinishArg = record {
-    authn_method: AuthnMethodData;
-};
-
-type IdRegFinishResult = record {
-    identity_number: nat64;
-};
-
-type IdRegFinishError = variant {
-    // The configured maximum number of identities has been reached.
-    IdentityLimitReached;
-    // This call is unexpected, see next_step.
-    UnexpectedCall: record {
-        next_step: RegistrationFlowNextStep;
-    };
-    // No registration flow ongoing for the caller.
-    NoRegistrationFlow;
-    // The supplied authn_method is not valid.
-    InvalidAuthnMethod: text;
-    // Error while persisting the new identity.
-    StorageError: text;
-};
-
 service : (opt InternetIdentityInit) -> {
     // Legacy identity management API
     // ==============================
@@ -613,17 +558,16 @@ service : (opt InternetIdentityInit) -> {
 
     // V2 Identity Management API
     // ==========================
-    // WARNING: The following methods are experimental and may ch 0ange in the future.
-
-    // Starts the identity registration flow to create a new identity.
-    identity_registration_start: () -> (variant {Ok: IdRegNextStepResult; Err: IdRegStartError;});
+    // WARNING: The following methods are experimental and may change in the future.
 
-    // Check the captcha challenge
-    // If successful, the registration can be finished with `identity_registration_finish`.
-    check_captcha: (CheckCaptchaArg) -> (variant {Ok: IdRegNextStepResult; Err: CheckCaptchaError;});
+    // Creates a new captcha. The solution needs to be submitted using the
+    // `identity_register` call.
+    captcha_create: () -> (variant {Ok: Challenge; Err;});
 
-    // Starts the identity registration flow to create a new identity.
-    identity_registration_finish: (IdRegFinishArg) -> (variant {Ok: IdRegFinishResult; Err: IdRegFinishError;});
+    // Registers a new identity with the given authn_method.
+    // A valid captcha solution to a previously generated captcha (using create_captcha) must be provided.
+    // The sender needs to match the supplied authn_method.
+    identity_register: (AuthnMethodData, CaptchaResult, opt principal) -> (variant {Ok: IdentityNumber; Err: IdentityRegisterError;});
 
     // Returns information about the authentication methods of the identity with the given number.
     // Only returns the minimal information required for authentication without exposing any metadata such as aliases.