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author | Amir Bandeali <abandeali1@gmail.com> | 2018-05-16 03:52:49 +0800 |
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committer | Amir Bandeali <abandeali1@gmail.com> | 2018-05-16 03:52:49 +0800 |
commit | 9e0471bfbb4bb2b3b490e10ce34b16c88e8bab9a (patch) | |
tree | f72aae5170b6f1f6d3d70ebf6c03ed171680ff50 /packages/order-utils/src/salt.ts | |
parent | 9744b1906a111aa0c65c8fafb4db66aef32a5a23 (diff) | |
parent | 6aed4fb1ae27dabed027c855f2cbdc0bfb4f3b6b (diff) | |
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Merge branch 'development' into v2-prototype
Diffstat (limited to 'packages/order-utils/src/salt.ts')
-rw-r--r-- | packages/order-utils/src/salt.ts | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/packages/order-utils/src/salt.ts b/packages/order-utils/src/salt.ts new file mode 100644 index 000000000..90a4197c0 --- /dev/null +++ b/packages/order-utils/src/salt.ts @@ -0,0 +1,18 @@ +import { BigNumber } from '@0xproject/utils'; + +const MAX_DIGITS_IN_UNSIGNED_256_INT = 78; + +/** + * Generates a pseudo-random 256-bit salt. + * The salt can be included in a 0x order, ensuring that the order generates a unique orderHash + * and will not collide with other outstanding orders that are identical in all other parameters. + * @return A pseudo-random 256-bit number that can be used as a salt. + */ +export function generatePseudoRandomSalt(): BigNumber { + // BigNumber.random returns a pseudo-random number between 0 & 1 with a passed in number of decimal places. + // Source: https://mikemcl.github.io/bignumber.js/#random + const randomNumber = BigNumber.random(MAX_DIGITS_IN_UNSIGNED_256_INT); + const factor = new BigNumber(10).pow(MAX_DIGITS_IN_UNSIGNED_256_INT - 1); + const salt = randomNumber.times(factor).round(); + return salt; +} |