commit 0705a59b22cfe45cb656605f9cecfecd2a874289 · bretton.dev/coves

+72
internal/db/migrations/005_create_phone_verification_tables.sql
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       -- +goose Up

     

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       -- Phone verification tables (privacy-first: only hashed phones stored)

     

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       -- Stores phone verification status (hashed phone only, no plaintext)

     

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       CREATE TABLE phone_verifications (

     

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           did TEXT PRIMARY KEY REFERENCES users(did) ON DELETE CASCADE,

     

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           phone_hash TEXT UNIQUE NOT NULL, -- HMAC-SHA256(phone, pepper) for duplicate detection

     

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           verified_at TIMESTAMP WITH TIME ZONE NOT NULL,

     

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           expires_at TIMESTAMP WITH TIME ZONE NOT NULL, -- Annual re-verification (365 days)

     

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           created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,

     

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           updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP

     

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       );

     

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       -- Index for checking if phone is already verified (duplicate prevention)

     

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       CREATE INDEX idx_phone_verifications_phone_hash ON phone_verifications(phone_hash);

     

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       CREATE INDEX idx_phone_verifications_expires_at ON phone_verifications(expires_at);

     

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       -- Stores pending verification requests (short-lived, auto-cleanup)

     

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       CREATE TABLE phone_verification_requests (

     

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           request_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),

     

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           did TEXT NOT NULL REFERENCES users(did) ON DELETE CASCADE,

     

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           phone_hash TEXT NOT NULL, -- Same hash as phone_verifications for duplicate check

     

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           otp_code_hash TEXT NOT NULL, -- Bcrypt hash of OTP code

     

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           attempts INT DEFAULT 0, -- Track failed attempts (max 3)

     

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           created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,

     

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           expires_at TIMESTAMP WITH TIME ZONE NOT NULL -- OTP expires in 10 minutes

     

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       );

     

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       CREATE INDEX idx_phone_verification_requests_did ON phone_verification_requests(did);

     

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       CREATE INDEX idx_phone_verification_requests_expires_at ON phone_verification_requests(expires_at);

     

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       -- Rate limiting table (prevent SMS abuse)

     

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       CREATE TABLE phone_verification_rate_limits (

     

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           identifier TEXT PRIMARY KEY, -- Could be DID or phone_hash

     

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           request_count INT DEFAULT 1,

     

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           window_start TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,

     

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           last_request_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP

     

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       );

     

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       CREATE INDEX idx_phone_verification_rate_limits_window ON phone_verification_rate_limits(window_start);

     

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       -- Audit log for security monitoring

     

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       CREATE TABLE phone_verification_audit_log (

     

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           id BIGSERIAL PRIMARY KEY,

     

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           did TEXT REFERENCES users(did) ON DELETE SET NULL,

     

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           event_type TEXT NOT NULL, -- 'request_sent', 'verification_success', 'verification_failed', 'rate_limit_hit'

     

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           phone_hash TEXT, -- Optional, for tracking abuse patterns

     

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           ip_address INET, -- Track source IP for fraud detection

     

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           user_agent TEXT,

     

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           metadata JSONB, -- Additional context (error details, etc.)

     

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           created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP

     

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       );

     

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       CREATE INDEX idx_phone_verification_audit_log_did ON phone_verification_audit_log(did);

     

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       CREATE INDEX idx_phone_verification_audit_log_event_type ON phone_verification_audit_log(event_type);

     

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       CREATE INDEX idx_phone_verification_audit_log_created_at ON phone_verification_audit_log(created_at);

     

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       -- Cleanup function for expired requests (run via cron)

     

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       CREATE OR REPLACE FUNCTION cleanup_expired_verification_requests()

     

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       RETURNS void AS $$

     

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       BEGIN

     

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           DELETE FROM phone_verification_requests WHERE expires_at < NOW();

     

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           DELETE FROM phone_verification_rate_limits WHERE window_start < NOW() - INTERVAL '1 hour';

     

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       END;

     

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       $$ LANGUAGE plpgsql;

     

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       -- +goose Down

     

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       DROP FUNCTION IF EXISTS cleanup_expired_verification_requests();

     

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       DROP TABLE IF EXISTS phone_verification_audit_log;

     

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       DROP TABLE IF EXISTS phone_verification_rate_limits;

     

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       DROP TABLE IF EXISTS phone_verification_requests;

     

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       DROP TABLE IF EXISTS phone_verifications;