Implement "Donate to REX" ACTON

[DenisCarriere]

Purpose

Create donatetorex ACTION where any account can donate EOS funds to REX pool.

System contract transfers EOS from owner account and adds liquidity to REX pool (increases APY%).

Donating to REX can be implemented by via automated smart contracts fee distribution or done via manual operation.

Feedback provided by

• @DenisCarriere
• @nsjames
• Tim Weston / Rob

donatetorex ACTION

/**
 * Donate funds to REX, increases REX pool return buckets
 * An inline transfer from payer to system contract of tokens will be executed.
 *
 * @param payer - the payer of donated funds.
 * @param quantity - the quantity of tokens to donated to REX with.
 * @param memo - the memo string to accompany the transaction.
 */
[[eosio::action]]
void donatetorex( const name& payer, const asset& quantity, const std::string& memo );

Preconditions

• require_auth(payer)
• must provide quantity above 0 amount
• funds received to contribute to REX return buckets

References

• channel_to_rex
• add_to_rex_pool

Note: changes should be pushed to Antelope Reference contracts https://github.com/AntelopeIO/reference-contracts

[DenisCarriere]

Implemented via: AntelopeIO/reference-contracts#61