Dapp-a-day 3: Eth Token Wrapper by nikolai

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ethereum · @nikolai · Aug 10 '16 (edited)

$32.66

Dapp-a-day 3: Eth Token Wrapper

![Nexus Logo](https://avatars3.githubusercontent.com/u/16971904?v=3&s=200)

**Each weekday leading up to devcon2, Nexus will highlight a dapp, library, or package (something with a `dappfile`) as a promotion of our toolchain and as case studies for other developers. [Yesterday's Post.](https://steemit.com/ethereum/@nikolai/dapp-a-day-2-base-actor)**

The Ether token wrapper wraps "native" Ether into an ERC20-compliant address. Using `.send` or `.call` to transfer Ether both have their own unintuitive edge cases and is a common cause of vulnerabilities.

https://github.com/nexusdev/ds-eth-token

An example app using the ETH token wrapper is https://mkr.market, which will get its own dapp-a-day later.

Between this package and `ds-actor`, most of the gotchas related to native direct calls are now non-issues.

We are almost ready to start looking at interesting dapps. There are a just a few more building blocks to cover. Stay tuned!

👍 summon, riverhead, eeks, kennyrowe, geoffrey, anonymous, nikolai, zebbra2014, murh, lantto, dbrock, soupernerd, cryptocylon, takenbtc, weenis, nicoleta, stevenh512, immortalking, igetgames, akaninyene-etuk, vodorog, emilyelizabeth, steemit.tips, abctrade, praisenoone, chonesta, redredwinewine, softpunk, hasherfromhell, koolaidssss, steemitlove, steemlove, countrytalented, gaspot, alniskobs, daysmega1421, anarchypory, crumaner, backetri, cheremet, angevel, daysaiyan, daysmega, amboyst, curls4life, cozyone123, dotersvilic, eternalabove, sugarfromhell

`author`	nikolai
`permlink`	dapp-a-day-3-eth-token-wrapper
`category`	ethereum
`json_metadata`	{"tags":["ethereum","dapp","blockchain","cryptocurrency"],"links":["https://avatars3.githubusercontent.com/u/16971904?v=3&s=200"]}
`created`	2016-08-10 16:18:21
`last_update`	2016-08-10 16:19:45
`depth`	0
`children`	3
`last_payout`	2016-09-10 05:33:00
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	29.598 HBD
`curator_payout_value`	3.061 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	943
`author_reputation`	9,571,877,600,096
`root_title`	"Dapp-a-day 3: Eth Token Wrapper"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	727,225
`net_rshares`	19,983,312,520,867
`author_curate_reward`	""

properties (23)vote details (49)

voter	rshares	pct
anonymous	28,850,811,064	1%
summon	12,891,706,677,024	100%
riverhead	6,306,361,362,730	100%
nikolai	19,347,368,111	100%
eeks	613,563,750,160	100%
murh	1,808,347,585	33.01%
kennyrowe	73,602,991,312	100%
akaninyene-etuk	53,447,148	100%
zebbra2014	4,139,383,401	100%
dbrock	352,733,312	100%
geoffrey	40,825,411,053	100%
soupernerd	226,085,432	10%
nicoleta	122,935,915	100%
cryptocylon	208,797,394	100%
emilyelizabeth	17,025,145	10%
weenis	166,415,113	10%
steemitlove	5,179,895	10%
steemlove	5,157,062	10%
steemit.tips	11,386,634	10%
curls4life	4,974,375	10%
alniskobs	5,070,951	10%
amboyst	4,974,431	10%
cheremet	5,024,576	10%
anarchypory	5,032,451	10%
angevel	5,014,001	10%
backetri	5,028,691	10%
chonesta	6,296,493	10%
countrytalented	5,126,390	10%
cozyone123	4,968,646	10%
crumaner	5,030,723	10%
daysaiyan	4,995,608	10%
daysmega	4,995,315	10%
daysmega1421	5,036,118	10%
dotersvilic	4,968,322	10%
eternalabove	4,936,293	10%
sugarfromhell	4,934,027	10%
gaspot	5,103,013	10%
abctrade	8,206,304	10%
praisenoone	6,591,935	10%
softpunk	6,256,684	10%
redredwinewine	6,288,439	10%
koolaidssss	6,114,670	10%
hasherfromhell	6,213,972	10%
immortalking	58,265,380	100%
takenbtc	187,286,281	100%
stevenh512	60,259,754	100%
lantto	1,390,183,093	100%
vodorog	53,054,177	100%
igetgames	57,024,264	100%

@alaynaspop · Aug 15 '16

Simply Great Information and Presentation

properties (22)

`author`	alaynaspop
`permlink`	re-nikolai-dapp-a-day-3-eth-token-wrapper-20160815t083016304z
`category`	ethereum
`json_metadata`	{"tags":["ethereum"]}
`created`	2016-08-15 08:30:15
`last_update`	2016-08-15 08:30:15
`depth`	1
`children`	0
`last_payout`	2016-09-10 05:33:00
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	0.000 HBD
`curator_payout_value`	0.000 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	41
`author_reputation`	-513,734,219,690
`root_title`	"Dapp-a-day 3: Eth Token Wrapper"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	813,544
`net_rshares`	0

@cryptocylon · Aug 11 '16

This series of writeups makes me so happy. Thank you for doing it!

properties (22)

`author`	cryptocylon
`permlink`	re-nikolai-dapp-a-day-3-eth-token-wrapper-20160811t014306889z
`category`	ethereum
`json_metadata`	{"tags":["ethereum"]}
`created`	2016-08-11 01:43:06
`last_update`	2016-08-11 01:43:06
`depth`	1
`children`	0
`last_payout`	2016-09-10 05:33:00
`cashout_time`	1969-12-31 23:59:59
`total_payout_value`	0.000 HBD
`curator_payout_value`	0.000 HBD
`pending_payout_value`	0.000 HBD
`promoted`	0.000 HBD
`body_length`	66
`author_reputation`	187,849,994,124
`root_title`	"Dapp-a-day 3: Eth Token Wrapper"
`beneficiaries`	`[]`
`max_accepted_payout`	1,000,000.000 HBD
`percent_hbd`	10,000
`post_id`	737,523
`net_rshares`	0

@kennyrowe · Aug 10 '16

@nikolai could you say anything more about the "gotchas"? Are there some known minor gatchas? What should people be careful of when deploying this package?

properties (22)