[SDK] buildApproveCalldata for wrapper exact-amount approve - #9479
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Encode exact-amount ERC-20 approve(wrapper, amount) for the shield path (selector 0x095ea7b3), including approve(0) reset. Validates EIP-55 address checksum and non-negative amount; does not set gasLimit. Ticket: CHALO-1153 Co-authored-by: Cursor <cursoragent@cursor.com>
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Description
Adds
buildApproveCalldata(wrapperAddress, amount)to@bitgo/abstract-ethfor the ERC-7984 shield path. Encodes ERC-20approve(spender, amount)with selector0x095ea7b3for exact-amount approvals of the confidential wrapper as spender, includingapprove(0)for the USDT-style reset branch.Validates EIP-55 address checksum and non-negative amount. Does not set
gasLimit(WP owns gas).Issue Number
CHALO-1153
Parent: CHALO-1135
Type of change
How Has This Been Tested?
yarn workspace @bitgo/abstract-eth unit-test --grep "Zama Utils"(62 passing, including new approve cases)Checklist:
Made with Cursor