Examine hamt

[willscott]

note: gocmp won't handle the full extent of a 3 way diff, so if we decide we need that, we'll end up with a bunch of additional logic to write.

This expands and provides insight into state root differences down to actor level:

Diff:   (*main.hamtNode)(Inverse(hamt.Node, &main.dag{
- 	ID:       s"bafy2bzacebuvoa3sslpbvz7qdkielph2gthzogp747747q3l7reogzxmkoeas",
+ 	ID:       s"bafy2bzacebqcoge3qnuv2kcqztnvlngd2cpydh2aitkup4njh3hl5ch2lg7qs",
  	Children: map[cid.Cid]interface{}{},
  	KVs: []main.kv{
  		{
  			Key: []uint8{0x00, 0x04},
  			Value: &types.Actor{
  				Code:    s"bafkqaetgnfwc6mjpon2g64tbm5sxa33xmvza",
- 				Head:    s"bafy2bzacednn4752arbtc25yjc3gkzj75a4kozuxkimvdr7njp4psv4lpvo6s",
+ 				Head:    s"bafy2bzaceapigtzewavukvtpjz6vlaje6ljv5oal4zchowqj6oo5rbn4yazsg",
  				Nonce:   0x00,
  				Balance: big.Int{Int: s"30000000000000"},
  			},
  		},
  		{
  			Key: []uint8{0x00, 0xe2, 0x32},
  			Value: &types.Actor{
  				Code:    s"bafkqaetgnfwc6mjpon2g64tbm5sw22lomvza",
- 				Head:    s"bafy2bzacecnwc267dnvctlal4logruamgalxidz2gymglpspga54sghoy5zsc",
+ 				Head:    s"bafy2bzacea6o3uyjvrbspot2ctx3zywzzx3woayguybztpskjutjdpakomdak",
  				Nonce:   0x00,
  				Balance: big.Int{Int: s"3073736017153794680188896"},
  			},
  		},
  		{
  			Key: []uint8{0x00, 0xe6, 0x25},
  			Value: &types.Actor{
  				Code:    s"bafkqadlgnfwc6mjpmfrwg33vnz2a",
  				Head:    s"bafy2bzaceaj5s2datvfhmex4u6p2mb66huqqq6qanckuwwfo73fc5gfzsalxy",
- 				Nonce:   0x1fad,
+ 				Nonce:   0x1fae,
- 				Balance: big.Int{Int: s"7073326284564908077557230"},
+ 				Balance: big.Int{Int: s"7073326284564786636283430"},
  			},
  		},
  		{Key: []uint8{0x00, 0x01}, Value: &types.Actor{Code: s"bafkqactgnfwc6mjpnfxgs5a", Head: s"bafy2bzacecxlid3ntwbnq775nx6vqrg6ozxii2hyhcd4n4gktxlilufzdhq7c", Balance: big.Int{Int: s"0"}}},
  		{
  			Key: []uint8{0x00, 0x02},
  			Value: &types.Actor{
  				Code:    s"bafkqaddgnfwc6mjpojsxoylsmq",
  				Head:    s"bafy2bzacecrdsz2scyuqqscs7v32oelqlpq4oymicptzclrmfntlzf2krotac",
  				Nonce:   0x00,
- 				Balance: big.Int{Int: s"1099624989525574571780738896"},
+ 				Balance: big.Int{Int: s"1099624989525574693222012696"},
  			},
  		},
  	},
  }))

Currently it takes in one test case and shows what changes between the pre and post root.

TODO:

• Ascribe prettier names to actors
• Expand the actor Head to its internal state tree

[willscott]

factored to separate command / continued in #227