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[wip] Read EMV data from card#12294

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[wip] Read EMV data from card#12294
davidme-stripe wants to merge 2 commits intomasterfrom
experiments/read-emv-data

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@davidme-stripe davidme-stripe commented Jan 31, 2026

Summary

Motivation

Testing

  • Added tests
  • Modified tests
  • Manually verified

Screenshots

Before After
before screenshot after screenshot

Changelog

@davidme-stripe davidme-stripe force-pushed the experiments/read-emv-data branch from ebae5fe to d56799b Compare January 31, 2026 03:36
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github-actions bot commented Jan 31, 2026 •
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Diffuse output:

OLD: paymentsheet-example-release-master.apk (signature: V1, V2)
NEW: paymentsheet-example-release-pr.apk (signature: V1, V2)

          │              compressed              │           uncompressed            
          ├─────────────┬─────────────┬──────────┼───────────┬───────────┬───────────
 APK      │ old         │ new         │ diff     │ old       │ new       │ diff      
──────────┼─────────────┼─────────────┼──────────┼───────────┼───────────┼───────────
      dex │       5 MiB │       5 MiB │ +6.6 KiB │  11.1 MiB │  11.1 MiB │ +16.5 KiB 
     arsc │     3.6 MiB │     3.6 MiB │      0 B │   3.6 MiB │   3.6 MiB │       0 B 
 manifest │     5.7 KiB │     5.7 KiB │      0 B │  30.2 KiB │  30.2 KiB │       0 B 
      res │ 1,006.4 KiB │ 1,006.4 KiB │      0 B │   1.7 MiB │   1.7 MiB │       0 B 
   native │   949.9 KiB │   949.9 KiB │      0 B │   2.5 MiB │   2.5 MiB │       0 B 
    asset │      27 KiB │    27.2 KiB │   +243 B │  47.6 KiB │  47.9 KiB │    +243 B 
    other │   222.3 KiB │   222.3 KiB │     -1 B │ 448.6 KiB │ 448.6 KiB │       0 B 
──────────┼─────────────┼─────────────┼──────────┼───────────┼───────────┼───────────
    total │    10.7 MiB │    10.7 MiB │ +6.8 KiB │  19.3 MiB │  19.3 MiB │ +16.7 KiB 

         │         raw          │               unique                
         ├───────┬───────┬──────┼───────┬───────┬─────────────────────
 DEX     │ old   │ new   │ diff │ old   │ new   │ diff                
─────────┼───────┼───────┼──────┼───────┼───────┼─────────────────────
   files │     2 │     2 │    0 │       │       │                     
 strings │ 58626 │ 58863 │ +237 │ 52457 │ 52445 │ -12 (+4383 -4395)   
   types │ 20659 │ 20852 │ +193 │ 17566 │ 17567 │  +1 (+4378 -4377)   
 classes │ 14749 │ 14750 │   +1 │ 14749 │ 14750 │  +1 (+3431 -3430)   
 methods │ 78280 │ 78557 │ +277 │ 73832 │ 73833 │  +1 (+28389 -28388) 
  fields │ 51438 │ 51745 │ +307 │ 49347 │ 49349 │  +2 (+23058 -23056) 

 ARSC    │ old  │ new  │ diff 
─────────┼──────┼──────┼──────
 configs │  325 │  325 │  0   
 entries │ 6978 │ 6978 │  0
APK 
      compressed       │     uncompressed      │                                           
───────────┬───────────┼───────────┬───────────┤                                           
 size      │ diff      │ size      │ diff      │ path                                      
───────────┼───────────┼───────────┼───────────┼───────────────────────────────────────────
 789.8 KiB │   +31 KiB │   1.8 MiB │   +58 KiB │ ∆ classes2.dex                            
   4.2 MiB │ -24.5 KiB │   9.4 MiB │ -41.6 KiB │ ∆ classes.dex                             
  10.7 KiB │    +214 B │  10.6 KiB │    +214 B │ ∆ assets/dexopt/baseline.prof             
     127 B │    +127 B │       5 B │      +5 B │ + META-INF/services/cn.x                  
     127 B │    +127 B │       5 B │      +5 B │ + META-INF/services/dn.a                  
           │    -127 B │           │      -5 B │ - META-INF/services/bn.x                  
           │    -127 B │           │      -5 B │ - META-INF/services/cn.a                  
   1.3 KiB │     +29 B │   1.2 KiB │     +29 B │ ∆ assets/dexopt/baseline.profm            
  58.1 KiB │      +3 B │ 128.7 KiB │       0 B │ ∆ META-INF/CERT.SF                        
     270 B │      -2 B │     120 B │       0 B │ ∆ META-INF/version-control-info.textproto 
   1.2 KiB │      -2 B │   1.2 KiB │       0 B │ ∆ META-INF/CERT.RSA                       
───────────┼───────────┼───────────┼───────────┼───────────────────────────────────────────
   5.1 MiB │  +6.8 KiB │  11.3 MiB │ +16.7 KiB │ (total)
DEX 
STRINGS:

   old   │ new   │ diff              
  ───────┼───────┼───────────────────
   52457 │ 52445 │ -12 (+4383 -4395) 
  
  + Laf/u;
  + Laf/v;
  + Laf/w;
  + Laf/x;
  + Laf/y;
  + Laf/z;
  + Lag/a1;
  + Lag/a2;
  + Lag/a3;
  + Lag/a4;
  + Lag/b1;
  + Lag/b2;
  + Lag/b3;
  + Lag/b4;
  + Lag/c1;
  + Lag/c2;
  + Lag/c3;
  + Lag/c4;
  + Lag/d1;
  + Lag/d2;
  + Lag/d3;
  + Lag/d4;
  + Lag/e1;
  + Lag/e2;
  + Lag/e3;
  + Lag/e4;
  + Lag/f1;
  + Lag/f2;
  + Lag/f3;
  + Lag/f4;
  + Lag/g1;
  + Lag/g2;
  + Lag/g3;
  + Lag/g4;
  + Lag/h1;
  + Lag/h2;
  + Lag/h3;
  + Lag/h4;
  + Lag/i1;
  + Lag/i2;
  + Lag/i3;
  + Lag/i4;
  + Lag/j1;
  + Lag/j2;
  + Lag/j3;
  + Lag/j4;
  + Lag/k1;
  + Lag/k2;
  + Lag/k3;
  + Lag/k4;
  + Lag/l1;
  + Lag/l2;
  + Lag/l3;
  + Lag/l4;
  + Lag/m1;
  + Lag/m2;
  + Lag/m3;
  + Lag/m4;
  + Lag/n1;
  + Lag/n2;
  + Lag/n3;
  + Lag/n4;
  + Lag/o1;
  + Lag/o2;
  + Lag/o3;
  + Lag/o4;
  + Lag/p1;
  + Lag/p2;
  + Lag/p3;
  + Lag/p4;
  + Lag/q1;
  + Lag/q2;
  + Lag/q3;
  + Lag/q4;
  + Lag/r1;
  + Lag/r2;
  + Lag/r3;
  + Lag/r4;
  + Lag/s1;
  + Lag/s2;
  + Lag/s3;
  + Lag/s4;
  + Lag/t1;
  + Lag/t2;
  + Lag/t3;
  + Lag/t4;
  + Lag/u1;
  + Lag/u2;
  + Lag/u3;
  + Lag/u4;
  + Lag/v1;
  + Lag/v2;
  + Lag/v3;
  + Lag/v4;
  + Lag/w1;
  + Lag/w2;
  + Lag/w3;
  + Lag/w4;
  + Lag/x0;
  + Lag/x1;
  + Lag/x2;
  + Lag/x3;
  + Lag/x4;
  + Lag/y0;
  + Lag/y1;
  + Lag/y2;
  + Lag/y3;
  + Lag/y4;
  + Lag/z0;
  + Lag/z1;
  + Lag/z2;
  + Lag/z3;
  + Lai/a0;
  + Lai/b0;
  + Lai/c0;
  + Lai/d0;
  + Lai/e0;
  + Lai/f0;
  + Lai/g0;
  + Lai/h0;
  + Lai/i0;
  + Lai/y;
  + Lai/z;
  + Lal/a2;
  + Lal/a3;
  + Lal/a4;
  + Lal/a5;
  + Lal/a6;
  + Lal/b0;
  + Lal/b2;
  + Lal/b5;
  + Lal/c2;
  + Lal/c5;
  + Lal/d3;
  + Lal/d4;
  + Lal/d5;
  + Lal/d6;
  + Lal/e0;
  + Lal/e1;
  + Lal/e2;
  + Lal/e3;
  + Lal/f1;
  + Lal/f2;
  + Lal/f3;
  + Lal/f6;
  + Lal/g1;
  + Lal/g2;
  + Lal/g3;
  + Lal/g4;
  + Lal/g5;
  + Lal/h2;
  + Lal/i0;
  + Lal/i1;
  + Lal/i2;
  + Lal/i3;
  + Lal/i4;
  + Lal/i;
  + Lal/j0;
  + Lal/j1;
  + Lal/j2;
  + Lal/j3;
  + Lal/j4;
  + Lal/j5;
  + Lal/j;
  + Lal/k1;
  + Lal/k3;
  + Lal/k5;
  + Lal/k;
  + Lal/l0;
  + Lal/l1;
  + Lal/l2;
  + Lal/l3;
  + Lal/l5;
  + Lal/l;
  + Lal/m0;
  + Lal/m1;
  + Lal/m2;
  + Lal/m4;
  + Lal/n1;
  + Lal/n3;
  + Lal/n4;
  + Lal/n5;
  + Lal/o1;
  + Lal/o2;
  + Lal/o;
  + Lal/p0;
  + Lal/p1;
  + Lal/p2;
  + Lal/p3;
  + Lal/p;
  + Lal/q0;
  + Lal/q3;
  + Lal/q4;
  + Lal/q5;
  + Lal/r3;
  + Lal/r4;
  + Lal/r5;
  + Lal/s0;
  + Lal/s2;
  + Lal/s5;
  + Lal/s;
  + Lal/t3;
  + Lal/t5;
  + Lal/t;
  + Lal/u2;
  + Lal/u3;
  + Lal/u4;
  + Lal/u5;
  + Lal/v1;
  + Lal/v3;
  + Lal/v5;
  + Lal/w0;
  + Lal/w5;
  + Lal/w;
  + Lal/x0;
  + Lal/x2;
  + Lal/x4;
  + Lal/x;
  + Lal/y0;
  + Lal/y1;
  + Lal/y3;
  + Lal/y4;
  + Lal/y;
  + Lal/z0;
  + Lal/z4;
  + Lal/z5;
  + Lan/e;
  + Lan/h;
  + Lan/i;
  + Lan/j;
  + Lan/k;
  + Lan/l;
  + Lan/m;
  + Landroidx/fragment/app/k2;
  + Landroidx/lifecycle/a1_a;
  + Lb1/k;
  + Lbb/v;
  + Lbd/e;
  + Lbd/f;
  + Lbd/g;
  + Lbd/h;
  + Lbd/i;
  + Lbd/j;
  + Lbd/k;
  + Lbd/l;
  + Lbd/m;
  + Lbd/n;
  + Lbd/o;
  + Lbd/p;
  + Lbd/q;
  + Lbd/r;
  + Lbd/s;
  + Lbd/t;
  + Lbf/q;
  + Lbf/r;
  + Lbf/s;
  + Lbf/t;
  + Lbg/a0;
  + Lbg/b0;
  + Lbg/c0;
  + Lbg/d0;
  + Lbg/e0;
  + Lbg/f0;
  + Lbg/g0;
  + Lbg/h0;
  + Lbg/i0;
  + Lbg/i;
  + Lbg/j0;
  + Lbg/j;
  + Lbg/k0;
  + Lbg/k;
  + Lbg/l0;
  + Lbg/l;
  + Lbg/m0;
  + Lbg/m;
  + Lbg/n0;
  + Lbg/n;
  + Lbg/o0;
  + Lbg/o;
  + Lbg/p0;
  + Lbg/p;
  + Lbg/q0;
  + Lbg/q;
  + Lbg/r0;
  + Lbg/r;
  + Lbg/s0;
  + Lbg/s;
  + Lbg/t0;
  + Lbg/t;
  + Lbg/u;
  + Lbg/v;
  + Lbg/w;
  + Lbg/x;
  + Lbg/y;
  + Lbg/z;
  + Lbh/a0;
  + Lbh/b0;
  + Lbh/b;
  + Lbh/c0;
  + Lbh/c;
  + Lbh/d0;
  + Lbh/d;
  + Lbh/e0;
  + Lbh/e;
  + Lbh/f0;
  + Lbh/f;
  + Lbh/g0;
  + Lbh/g;
  + Lbh/h0;
  + Lbh/h;
  + Lbh/i0;
  + Lbh/i;
  + Lbh/j0;
  + Lbh/j;
  + Lbh/k0;
  + Lbh/k;
  + Lbh/l0;
  + Lbh/l;
  + Lbh/m0;
  + Lbh/m;
  + Lbh/n0;
  + Lbh/n;
  + Lbh/o0;
  + Lbh/o;
  + Lbh/p0;
  + Lbh/p;
  + Lbh/q0;
  + Lbh/q;
  + Lbh/r0;
  + Lbh/r;
  + Lbh/s0;
  + Lbh/s;
  + Lbh/t0;
  + Lbh/t;
  + Lbh/u0;
  + Lbh/u;
  + Lbh/v0;
  + Lbh/v;
  + Lbh/w;
  + Lbh/x;
  + Lbh/y;
  + Lbh/z;
  + Lbi/f;
  + Lbi/g;
  + Lbi/h;
  + Lbi/i;
  + Lbi/j;
  + Lbi/k;
  + Lbi/l;
  + Lbi/m;
  + Lbi/n;
  + Lbi/o;
  + Lbi/p;
  + Lbi/q;
  + Lbi/r;
  + Lbi/s;
  + Lbi/t;
  + Lbi/u;
  + Lbi/v;
  + Lbj/a0;
  + Lbj/a1;
  + Lbj/a2;
  + Lbj/a3;
  + Lbj/b0;
  + Lbj/b1;
  + Lbj/b2;
  + Lbj/b3;
  + Lbj/c0;
  + Lbj/c1;
  + Lbj/c2;
  + 
...✂

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